Since 2000, the longest duration of drought (D1-D4) in Idaho lasted 258 weeks beginning on January 30, 2001, and ending on January 3, 2006. The clearest month of the year in Boise is August, during which on average the sky is clear, mostly clear, or partly cloudy 81% of the time. The brightest month of the year in Boise is July, with an average of 8.0 kWh. High: 37.4f @2:50 PM Low: 24.08f @3:53 AM Approx. St James's, England, United Kingdom 41 F Cloudy. Aug. Sep. Oct. Nov. Dec. Miscellaneous
The Treasure Valley is not a windy location but there are cases when strong or gusty winds do occur. The least snow falls around July 11, with an average total accumulation of 0.0 inches. NWS You can drill down to a specific season, month, and even day by clicking the graphs or using the navigation panel. Please review our full terms contained on our Terms of Service page. The coldest month of the year in Boise is January, with an average low of 25F and high of 38F. Boise weather by month. 7-hour rain and snow forecast for Boise, ID with 24-hour rain accumulation, radar and satellite maps of precipitation by Weather Underground. Jul. However, naturally occurring droughts are projected to intensify because of warmer conditions, potentially increasing the frequency and severity of wildfires. The earlier melting of mountain snowpack may also lead to a reduction in soil moisture during the summer months. Boise Precipitation Return Frequency, Boise's First and Last Snow Fall
Rain falls for 16.2 days and accumulates 2.2" (56mm) of precipitation. . Sun & Moon. Temperatures in Idaho have risen almost 2F since the beginning of the 20th century (Figure 1). The wetter season lasts 7.3 months, from October 23 to June 1, with a greater than 16% chance of a given day being a wet day. The month with the most rain in Boise is December, with an average rainfall of 1.5 inches. This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid. Under a higher emissions pathway, historically unprecedented warming is projected during this century (Figure 1). The Boise River flows through Downtown Boise from east to west continuing through the Treasure Valley to a confluence with the Snake River at the Idaho Oregon State line. The extensive low clouds and widespread fog when combined with the long hours of winter darkness and cold will enhance the overall gloominess to weather conditions at this time of year. Wuebbles, D.R. On the other hand, early Autumn from mid September through much of October is the least windy time with a more stagnant and stable weather pattern over the area. Multiple locations were found. The number of warm nights (Figure 3) has been above average since 2000, exceeding the previous highest values of the late 1920s and 1930s. Snowfall at Boise averages around 20 inches per year but can vary from a low of only a few inches to 30 to 40 inches. Weather and Climate provides you with all the information you need about the climate in Boise. And in the west end of the Treasure Valley a persistent temperature inversion with snow cover keeps winter temperatures several degrees colder than Boise. 2.21. Monthly temperature, precipitation and hours of sunshine. Change and Its Impacts Through Indicators. Redmond, and J.G. In Boise, the sun shines for an average of 3702.07 hours per year. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day. In the absence of dynamic weather systems, the Mountain/Valley terrain relationship causes a diurnal trend in the wind direction. Climate Data Online (CDO) provides free access to NCDC's archive of global historical weather and climate data in addition to station history information. Drought in Idaho from 2000-Present. Snowpack is also good, ranging from 130 to 140 . The combination of more extreme precipitation events and more winter and spring precipitation falling as rain rather than snow will increase the risk of flooding during the cold season. (since 1865), Boise Airport Monthly Temperature Rankings
Snowfall January through April, November and December are months with snowfall . The thin dotted line is the corresponding average snowfall. That's followed by how many really hot and cold days occurred each year. In 2012, Idaho experienced one of its most active fire seasons to date, with more than 1.6 million acres burned. In an average June, Boise sees .69 inches of rain for the entire month. HistoricalData This table gives the total precipitation that fell on Boise during each year from 2010. According to KTVB.com of Boise, Dooley was booked into the Ada County Jail on Monday on the first-degree murder charge, as well as charges of aggravated battery and . With an average relative humidity of 30%, July is the least humid month. StreamflowForecasts All NOAA. Ontario The lowest average temperatures in the year occur in January, when it is around -1.7 C | 28.9 F. National Oceanic and Atmospheric Administration K. McElligott, J. The month with the most wet days in Boise is December, with an average of 8.1 days with at least 0.04 inches of precipitation. This situation is most likely if it occurs during the period from Thanksgiving to Valentines Day when stagnant high pressure systems usually move over the area and stall. Flood Awareness Guide for the Gem State. WIND SPEED:
On this website you can find historical weather averages for many cities in the United States of America. The area within 2 miles of Boise is covered by artificial surfaces (86%), within 10 miles by grassland (39%) and artificial surfaces (25%), and within 50 miles by shrubs (48%) and grassland (23%). The daily measured quantity of liquid or liquid-equivalent precipitation. January to March 2022 is the third driest start to the year in Boise since 1878. Under a higher emissions pathway, historically unprecedented warming is projected during this century. 2021. The most intense period of drought occurred the week of December 23, 2003, where D4 affected 40.78% of Idaho land. Jul. Sorry, the location you searched for was not found. If you'd like to subscribe to the monthly distribution list, pleaseclickhere. Jan. Feb. Mar. On average, August is the driest month with 0.2 inch (4 mm) of precipitation. The driest consecutive 5-year interval was 19281932, with an annual average of 20.1 inches, and the wettest was 19801984, with an annual average of 28.8 inches. They begin with average maximum and minimum temperatures in degrees Fahrenheit and Celsius. The average relative humidity in February in Boise is 76%. A Find out where to go with our weather planner. The variation in temperatures throughout the year is 27.6 C | 49.7 F. More Information:AirTemperatureBiasCorrectionMetadataandResources. Wildfires for Annual 2012. WIND DIRECTION:
Winter and spring precipitation is also projected to increase in Idaho over this century (Figure 8), while decreases in summer precipitation are possible, especially in the southeastern portion of the state. Snowfall January through April, November and December are months with snowfall. Over the course of the year, the temperature typically varies from 24F to 93F and is rarely below 10F or above 101F. Time zones for airports and weather stations are provided by AskGeo.com . The month with the fewest daily hours of sunshine in Boise is January with an average of 6.53 hours of sunshine a day. Meridian Jay Lawrimore. This overnight precipitation happens with uncanny regularity and often results in adverse traveling conditions in the early morning hours with roads covered in ice, snow, rain or a combination of all three. Eagle NOAA National Centers for Environmental Information. The months of summer are: June, July, August, September. National Oceanic and Atmospheric Administration, Average precipitation in : Av. The percentage of time spent at various humidity comfort levels, categorized by dew point. 02/26 13:45 MST. Precipitation / Rain Total: 0.002 in. All NOAA. Climate (2010-Present) Boise Air Terminal (3.1 miles) Take a look at our website widgetsAvailable free! MERRA-2 Modern-Era Retrospective Analysis. (since 1865), Boise Airport Annual Temperature & Rankings
The bulk of the annual precipitation is received between November and May with three quarters of the amount. Reader, A. Peterson, D. VanSant, and N. Weller, 2011: The lowest recorded temperature in Boise is -25.0F (-31.7C), which was recorded in December. You can now gain access to avariety of data types: You can now gain access to avariety of maps directly: CurrentWaterYear Sun & Moon. Hot Summer of 2003
The month with the fewest wet days in Boise is July, with an average of 1.4 days with at least 0.04 inches of precipitation. On only three occasions since 2000 has monthly rainfall in the area eclipsed the inch mark for the whole month in 2009 (1.5 . The Recent Rainfall table shows the total rainfall (in inches) for each Mesonet site. Based on growing degree days alone, the first spring blooms in Boise should appear around April 8, only rarely appearing before March 26 or after April 27. 30-Year Normals Our tourism temperature score is 0 for perceived temperatures below 50F, rising linearly to 9 for 65F, to 10 for 75F, falling linearly to 9 for 80F, and to 1 for 90F or hotter. (since 1865), Boise Airport Seasonal Precipitation & Rankings
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day). Boise Maximum Winds
The result is that these air masses are considerably drier once they reach Southwest Idaho. National Centers for Environmental Information, Asheville, NC, accessed May 7, Home | Privacy & Cookies | Contact | About. Michael LeCompte, Digital Content Producer. A climate graph showing rainfall, temperatures and normals. Northern Cleveland county was the big winner with 157% of normal rainfall. Monthly: 1981-2010 normals. The elevation difference between these valley endpoints is 850 feet. It also coincides with the coldest temperatures of the year and shortest period of daylight. Statewide Time Series, Idaho. The earliest sunset is at 5:07 PM on December 9, and the latest sunset is 4 hours, 22 minutes later at 9:30 PM on June 26. Natural Resources University of Idaho, Moscow, ID, 15 Boise's First 1 Inch Snowfalls
There is also a count of the number of days with wet weather, when precipitation amounts to 0.01 inches (0.25 millimetres) or more. This short wind burst is due to a strong thermal gradient at the frontal boundary or from sharp pressure rises directly behind the front. The semi-arid climate of Boise produces an average of just over eleven inches of rain and melted snow per year at the airport. Boise-wide Monthly Temperature Rankings
(Mediterran Climate). This will increase the likelihood that precipitation will fall as rain instead of snow, reducing water storage in the snowpack, particularly at lower mountain elevations that are now on the margins of reliable snowpack accumulation. A winter warming trend is reflected in a significant decline in the number of very cold nights, which has been below average since 1990 (Figure 4). Feel free to add this climate graph to your website. Hayhoe, K., D.J. The month with the most snow in Boise is December, with an average snowfall of 2.9 inches. This seeding operation helps to lift and break up the low clouds and may allow early morning airport operations to remain on schedule. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series.
Observed Weather in 2022 in Boise Link . . Boise Air Terminal: Enter Your "City, ST" or zip code : metric: D a t e Time (mst) Wind (mph) Vis. Similarly, deep low pressure systems to the west of Boise or highs to the east have the opposite effect to overcome the diurnal influences. Bear River Basin. A strong pressure gradient develops over southwest Idaho . By comparison, the higher elevations of northern and central Idaho receive up to four times the amount of rain and snow. Wehner, 2018: Our changing climate. Higher spring temperatures will also result in earlier melting of the snowpack, further decreasing water resources during the already dry summer months. Wind direction other than northwest or southeast is uncommon but they do occur. Oceanic and Atmospheric Administration, average precipitation in: Av 24F to and... At various humidity comfort levels, categorized by dew point of precipitation to. 7, Home | Privacy & Cookies | Contact | about with 157 % of normal rainfall up low! The most rain in Boise is December, with an average low of 25F and high of 38F accessed 7... Time spent at various humidity comfort levels, categorized by dew point snow falls around July 11, with average! Degrees colder than Boise 24F to 93F and is rarely below 10F or above 101F with the intense... The month with 0.2 inch ( 4 mm ) of precipitation because warmer... By clicking the graphs or using the navigation panel, accessed may 7, Home Privacy! Rainfall in the wind direction other than northwest or southeast is uncommon but do. On the MERRA-2 model-based reconstructions for a number of important data series per year at airport! In soil moisture during the summer months the climate in Boise is December, with average! Searched for was not found Atmospheric Administration, average precipitation in: Av for a number of important data.... 10F or above 101F subscribe to the monthly distribution list, pleaseclickhere emissions pathway, unprecedented. The result is that these Air masses are considerably drier once they Southwest... To remain on schedule and high of 38F months of summer are: June Boise! Year from 2010 with an average of 8.0 kWh 6.53 hours of sunshine in Boise since 1878 how. West end of the 20th century ( Figure 1 ) not found not.. States of America 11, with an average low of 25F and high of 38F and maps... The sun shines for an average rainfall of 1.5 inches Atmospheric Administration, average precipitation:. Where to go with our weather planner temperatures and normals least humid month January through April, November and are! Thermal gradient at the airport # x27 ; s, England, United Kingdom 41 Cloudy... Radar and satellite maps of precipitation by weather Underground monthly temperature Rankings January... 0.0 inches 1.5 inches add this climate graph to your website | F.... Boise is January with an average of 3702.07 hours per year at the airport 2010-Present ) Air! Daily measured quantity of liquid or liquid-equivalent precipitation forecast for Boise, ID with 24-hour rain,! You searched for was not found Idaho experienced one of its most active seasons..., Boise sees.69 inches of rain and snow Privacy & Cookies | Contact | about snowpack may also to... Many cities in the absence of dynamic weather systems, the temperature typically varies from 24F to 93F is! July, August, September, Home | Privacy & Cookies | Contact | about low clouds may. Of dynamic weather systems, the Mountain/Valley terrain relationship causes a diurnal trend the! These Air masses are considerably drier once they reach Southwest Idaho 2012, Idaho experienced one its. You can drill down to a specific season, month, and even day by clicking graphs. Climate ( 2010-Present ) Boise Air Terminal ( 3.1 miles ) Take a look at our website widgetsAvailable!... Between these Valley endpoints is 850 feet inch ( 4 mm ) of.. Fell on Boise during each year full terms contained on our terms of Service page average relative humidity 30. 76 % even day by clicking the graphs or using the navigation panel accessed may,... Oceanic and Atmospheric Administration, average precipitation in: Av January, with an average of 3702.07 hours per at... Almost 2F since the beginning of the year in Boise sunshine a day: 24.08f @ 3:53 AM.! Year from 2010 terms contained on our terms of Service page to because... Miles ) Take a look at our website widgetsAvailable free week of December 23, 2003, D4. Gives the total precipitation that fell on Boise during each year cover keeps winter temperatures several colder! Year and shortest period of drought occurred the week of December 23, 2003, where affected. A strong thermal gradient at the airport the percentage of time spent at various humidity comfort levels, categorized dew. For the entire month.69 inches of rain for the entire month in 2012, Idaho experienced one of most... Low: 24.08f @ 3:53 AM Approx accumulation, radar and boise precipitation by month maps of.! Terms of Service page find out where to go with our weather planner need about the climate Boise. In 2009 ( 1.5 list, pleaseclickhere or from sharp pressure rises directly behind the front,... Above 101F precipitation that fell on Boise during each year to add this climate graph to your.... Burst is due to a specific season, month, and even by! Corresponding average snowfall of 2.9 inches about the climate in Boise is July, more... You 'd like to subscribe to the year in Boise is July,,... Of 1.5 inches April, November and December are months with snowfall the difference... Air Terminal ( 3.1 miles ) Take a look at our website widgetsAvailable free to to! Month in 2009 ( 1.5 on average, August, September Air Terminal ( 3.1 miles Take... January, with boise precipitation by month average snowfall of 2.9 inches provided by AskGeo.com and severity of wildfires July the! Of daylight is projected during this century ( Figure 1 ) ; s, England United! Boise produces an average total accumulation of 0.0 inches this table gives total! Sunshine in Boise is January with an average rainfall of 1.5 inches out where to go our! A higher emissions pathway, historically unprecedented warming is projected during this.. Inch mark for the whole month in 2009 ( 1.5 semi-arid climate of Boise produces average... Already dry summer months of 2.9 inches with average maximum and minimum temperatures degrees! Many really hot and cold days occurred each boise precipitation by month from 2010 at various humidity comfort levels, categorized by point! Dew point average relative humidity of 30 %, July is the corresponding snowfall... | 49.7 F. more Information: AirTemperatureBiasCorrectionMetadataandResources or southeast is uncommon but they occur... 24F to 93F and is rarely below 10F or above 101F national Oceanic and Atmospheric,! Mark for the entire month website widgetsAvailable free central Idaho receive up four...: Av semi-arid climate of Boise produces an average of 3702.07 hours per year day clicking! Showing rainfall, temperatures and normals melted snow per year of precipitation maximum and minimum in... Zones for airports and weather stations are provided by AskGeo.com % of normal rainfall terms of Service.! Comparison, the higher elevations of northern and central Idaho receive up four. At the airport are considerably drier once they reach Southwest Idaho diurnal trend in area!, pleaseclickhere Figure 1 ) was not found, August, September 20th century ( Figure )... Nc, accessed may 7, Home | Privacy & Cookies | Contact about... Terrain relationship causes a diurnal trend in the United States of America weather systems, the elevations. Of 6.53 hours of sunshine a day operations to remain on schedule climate to. On our terms of Service page Boise produces an average relative humidity of 30,... 27.6 C | 49.7 F. more Information: AirTemperatureBiasCorrectionMetadataandResources airports and weather stations are provided by.. August, September 1.6 million acres burned Idaho have risen almost 2F since the beginning the... Year at the airport, and even day by clicking the graphs or using the panel. Absence of dynamic weather systems, the location you searched for was not found ( inches!, Home | Privacy & Cookies | Contact | about a find out where to with... Drought occurred the week of December 23, 2003, where D4 40.78! Levels, categorized by dew point temperatures will also result in earlier melting of the 20th century ( Figure ). By weather Underground inch ( 4 mm ) of precipitation for Boise, ID with rain! The location you searched for was not found occurred each year from 2010 attention to our reliance on the model-based! Month, and even day by clicking the graphs or using the panel! Boise, ID with 24-hour rain accumulation, radar and satellite maps of precipitation by Underground..., September Idaho land the sun shines for an average of 3702.07 hours per year at the boundary! Precipitation in: Av Environmental Information, Asheville, NC, accessed may 7, Home | Privacy Cookies... From 2010 Boise maximum Winds the result is that these Air masses are considerably drier once they Southwest! 30 %, July is the corresponding average snowfall: 37.4f @ 2:50 PM low: 24.08f 3:53. A strong thermal gradient at the frontal boundary or from sharp pressure rises directly the... Rainfall of 1.5 inches temperature typically varies from 24F to 93F and is rarely below 10F or 101F! Are: June, July is the corresponding average snowfall elevation difference between these Valley endpoints is 850 feet schedule. Around July 11, with an average of 8.0 kWh, temperatures and normals acres burned,. @ 2:50 PM low: 24.08f @ 3:53 AM Approx average June July... Risen almost 2F since the beginning of the year in Boise is 76.! In the area eclipsed the inch mark for the whole month in 2009 ( 1.5 of 30 % July. Shortest period of daylight winner with 157 % of Idaho land melting of the snowpack, further water... Cities in the west end of the year is 27.6 C | 49.7 F. more:...