Average Weather in February in Granite Falls Washington, United States
Daily high temperatures increase by 8°F, from 35°F to 43°F, rarely falling below 25°F or exceeding 51°F.
Daily low temperatures increase by 4°F, from 24°F to 28°F, rarely falling below 13°F or exceeding 36°F.
For reference, on August 1, the hottest day of the year, temperatures in Granite Falls typically range from 59°F to 86°F, while on December 25, the coldest day of the year, they range from 21°F to 30°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 Granite Falls experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 64% throughout the month.
The clearest day of the month is February 21, with clear, mostly clear, or partly cloudy conditions 38% of the time.
For reference, on January 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 67%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 79%.
Cloud Cover Categories in February
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Granite Falls, the chance of a wet day over the course of February is essentially constant, remaining around 28% throughout.
For reference, the year's highest daily chance of a wet day is 38% on November 18, and its lowest chance is 6% on August 10.
Over the course of February in Granite Falls, the chance of a day with only rain increases from 10% to 18%, the chance of a day with mixed snow and rain decreases from 8% to 6%, and the chance of a day with only snow decreases from 10% to 5%.
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 Granite Falls is gradually increasing, starting the month at 1.0 inches, when it rarely exceeds 2.3 inches or falls below 0.1 inches, and ending the month at 1.3 inches, when it rarely exceeds 2.6 inches or falls below 0.2 inches.
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 Granite Falls is decreasing, starting the month at 1.0 inches, when it rarely exceeds 2.0 inches or falls below 0.1 inches, and ending the month at 0.5 inches, when it rarely exceeds 1.1 inches.
Average Monthly Liquid-Equivalent Snowfall in February
Over the course of February in Granite Falls, 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, 27 minutes, implying an average daily increase of 3 minutes, 14 seconds, and weekly increase of 22 minutes, 37 seconds.
The shortest day of the month is February 1, with 9 hours, 34 minutes of daylight and the longest day is February 28, with 11 hours, 1 minute of daylight.
Hours of Daylight and Twilight in February
The latest sunrise of the month in Granite Falls is 7:27 AM on February 1 and the earliest sunrise is 45 minutes earlier at 6:43 AM on February 28.
The earliest sunset is 5:01 PM on February 1 and the latest sunset is 43 minutes later at 5:44 PM on February 28.
Daylight saving time is observed in Granite Falls during 2018, 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 5:01 AM and sets 16 hours, 2 minutes later, at 9:03 PM, while on December 21, the shortest day of the year, it rises at 7:47 AM and sets 8 hours, 23 minutes later, at 4:10 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 Granite Falls is essentially constant during February, remaining around 0% throughout.
Humidity Comfort Levels in February
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Granite Falls is essentially constant during February, remaining within 0.2 miles per hour of 4.2 miles per hour throughout.
For reference, on May 6, the windiest day of the year, the daily average wind speed is 5.1 miles per hour, while on December 21, the calmest day of the year, the daily average wind speed is 3.9 miles per hour.
Average Wind Speed in February
Wind Direction in February
Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).
The growing season in Granite Falls typically lasts for 5.9 months (179 days), from around April 22 to around October 18, rarely starting before April 1 or after May 12, and rarely ending before October 1 or after November 4.
The month of February in Granite Falls is reliably fully outside of the growing season.
Time Spent in Various Temperature Bands and the Growing Season in February
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.
The average accumulated growing degree days in Granite Falls are essentially constant during February, remaining around 0°F throughout.
Growing Degree Days 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 Granite Falls is increasing during February, rising by 1.1 kWh, from 1.8 kWh to 2.9 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 Granite Falls are 47.890 deg latitude, -120.214 deg longitude, and 1,873 ft elevation.
The topography within 2 miles of Granite Falls contains large variations in elevation, with a maximum elevation change of 3,035 feet and an average elevation above sea level of 1,860 feet. Within 10 miles contains large variations in elevation (6,444 feet). Within 50 miles also contains extreme variations in elevation (9,938 feet).
The area within 2 miles of Granite Falls is covered by shrubs (38%), water (29%), and sparse vegetation (19%), within 10 miles by shrubs (48%) and sparse vegetation (17%), and within 50 miles by shrubs (43%) and trees (25%).
This report illustrates the typical weather in Granite Falls 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 Granite Falls.
For each station, the records are corrected for the elevation difference between that station and Granite Falls 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 Granite Falls is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Granite Falls and a given station.
The stations contributing to this reconstruction are: Pangborn Field (55%, 55 kilometers, south); Omak Airport (32%, 82 kilometers, northeast); and Arlington Municipal Airport (13%, 148 kilometers, west).
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.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.