Average Weather in February in Boise Idaho, United States
In Boise, the month of February is characterized by rapidly rising daily high temperatures, with daily highs increasing by 10°F, from 41°F to 50°F over the course of the month, and rarely exceeding 61°F or dropping below 30°F.
Daily low temperatures increase by 6°F, from 27°F to 33°F, rarely falling below 15°F or exceeding 42°F.
For reference, on July 26, the hottest day of the year, temperatures in Boise typically range from 63°F to 93°F, while on January 1, the coldest day of the year, they range from 24°F to 36°F.
Average High and Low Temperature in February
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on February. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in February
The month of February in Boise experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 57% throughout the month.
The clearest day of the month is February 14, with clear, mostly clear, or partly cloudy conditions 44% of the time.
For reference, on January 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 59%, while on July 28, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 83%.
Cloud Cover Categories in February
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Boise, the chance of a wet day over the course of February is gradually increasing, starting the month at 21% and ending it at 23%.
For reference, the year's highest daily chance of a wet day is 28% on December 1, and its lowest chance is 3% on July 28.
Over the course of February in Boise, the chance of a day with only rain increases from 16% to 22%, the chance of a day with mixed snow and rain remains an essentially constant 2% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout.
Probability of Precipitation in February
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during February in Boise is essentially constant, remaining about 1.1 inches throughout, and rarely exceeding 2.3 inches or falling below 0.2 inches.
The lowest average 31-day accumulation is 1.1 inches on February 3.
Average Monthly Rainfall in February
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during February in Boise is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.6 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in February
Over the course of February in Boise, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 15 minutes, implying an average daily increase of 2 minutes, 46 seconds, and weekly increase of 19 minutes, 21 seconds.
The shortest day of the month is February 1, with 9 hours, 56 minutes of daylight and the longest day is February 28, with 11 hours, 10 minutes of daylight.
Hours of Daylight and Twilight in February
The latest sunrise of the month in Boise is 8:00 AM on February 1 and the earliest sunrise is 38 minutes earlier at 7:22 AM on February 28.
The earliest sunset is 5:56 PM on February 1 and the latest sunset is 36 minutes later at 6:32 PM on February 28.
Daylight saving time is observed in Boise during 2017, but it neither starts nor ends during February, so the entire month is in standard time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:03 AM and sets 15 hours, 26 minutes later, at 9:29 PM, while on December 21, the shortest day of the year, it rises at 8:15 AM and sets 8 hours, 56 minutes later, at 5:11 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in February
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The chance that a given day will be muggy in Boise is essentially constant during February, remaining around 0% throughout.
For reference, on August 24, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in February
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Boise is gradually increasing during February, increasing from 6.6 miles per hour to 7.1 miles per hour over the course of the month.
For reference, on April 1, the windiest day of the year, the daily average wind speed is 7.5 miles per hour, while on September 15, the calmest day of the year, the daily average wind speed is 6.3 miles per hour.
Average Wind Speed in February
Wind Direction in February
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy in Boise is gradually increasing during February, rising by 1.0 kWh, from 2.4 kWh to 3.4 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in February
For the purposes of this report, the geographical coordinates of Boise are 43.613 deg latitude, -116.203 deg longitude, and 2,740 ft elevation.
The topography within 2 miles of Boise contains significant variations in elevation, with a maximum elevation change of 505 feet and an average elevation above sea level of 2,746 feet. Within 10 miles contains significant variations in elevation (3,980 feet). Within 50 miles also contains extreme variations in elevation (7,556 feet).
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%).
This report illustrates the typical weather in Boise year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Boise.
For each station, the records are corrected for the elevation difference between that station and Boise according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Boise is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Boise and a given station.
The stations contributing to this reconstruction are: Boise Air Terminal (98%, 6.0 kilometers, southwest); Stanley, Stanley Ranger Station (0.7%, 120 kilometers, northeast); and McCall Airport (0.8%, 142 kilometers, north).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . 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.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.