Average Weather in February in Sunnyside Washington, United States
In Sunnyside, the month of February is characterized by rapidly rising daily high temperatures, with daily highs increasing by 10°F, from 43°F to 53°F over the course of the month, and rarely exceeding 62°F or dropping below 31°F.
Daily low temperatures increase by 4°F, from 29°F to 33°F, rarely falling below 19°F or exceeding 42°F.
For reference, on July 30, the hottest day of the year, temperatures in Sunnyside typically range from 62°F to 94°F, while on December 23, the coldest day of the year, they range from 26°F to 37°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 Sunnyside experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 61% throughout the month.
The clearest day of the month is February 21, with clear, mostly clear, or partly cloudy conditions 41% of the time.
For reference, on January 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 65%, while on August 4, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 83%.
Cloud Cover in February
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Sunnyside, the chance of a wet day over the course of February is essentially constant, remaining around 17% throughout.
For reference, the year's highest daily chance of a wet day is 23% on December 1, and its lowest chance is 2% on August 16.
Over the course of February in Sunnyside, the chance of a day with only rain remains an essentially constant 13% throughout, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow decreases from 3% to 1%.
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 Sunnyside is essentially constant, remaining about 0.6 inches throughout, and rarely exceeding 1.3 inches or falling below 0.1 inches.
The highest average 31-day accumulation is 0.6 inches on February 18.
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 Sunnyside 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 Sunnyside, 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, 22 minutes, implying an average daily increase of 3 minutes, 3 seconds, and weekly increase of 21 minutes, 22 seconds.
The shortest day of the month is February 1, with 9 hours, 43 minutes of daylight and the longest day is February 28, with 11 hours, 5 minutes of daylight.
Hours of Daylight and Twilight in February
The latest sunrise of the month in Sunnyside is 7:22 AM on February 1 and the earliest sunrise is 42 minutes earlier at 6:40 AM on February 28.
The earliest sunset is 5:05 PM on February 1 and the latest sunset is 40 minutes later at 5:45 PM on February 28.
Daylight saving time is observed in Sunnyside 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 5:07 AM and sets 15 hours, 48 minutes later, at 8:55 PM, while on December 21, the shortest day of the year, it rises at 7:40 AM and sets 8 hours, 36 minutes later, at 4:16 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 Sunnyside is essentially constant during February, remaining around 0% throughout.
For reference, on July 15, 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 Sunnyside is essentially constant during February, remaining within 0.1 miles per hour of 4.3 miles per hour throughout.
For reference, on March 31, the windiest day of the year, the daily average wind speed is 4.7 miles per hour, while on September 9, 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
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 Sunnyside is increasing during February, rising by 1.1 kWh, from 1.9 kWh to 3.0 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 Sunnyside are 46.324 deg latitude, -120.009 deg longitude, and 778 ft elevation.
The topography within 2 miles of Sunnyside contains only modest variations in elevation, with a maximum elevation change of 308 feet and an average elevation above sea level of 768 feet. Within 10 miles contains only modest variations in elevation (2,116 feet). Within 50 miles contains large variations in elevation (5,597 feet).
The area within 2 miles of Sunnyside is covered by cropland (55%) and artificial surfaces (45%), within 10 miles by cropland (61%) and shrubs (25%), and within 50 miles by shrubs (60%) and cropland (27%).
This report illustrates the typical weather in Sunnyside 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Sunnyside.
For each station, the records are corrected for the elevation difference between that station and Sunnyside 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 Sunnyside is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Sunnyside and a given station.
The stations contributing to this reconstruction are: Hanford (43%, 41 kilometers, northeast); Yakima Air Terminal Airport (32%, 49 kilometers, northwest); Hermiston Municipal Airport (16%, 80 kilometers, southeast); and The Dalles Municipal Airport (9%, 119 kilometers, southwest).
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.