Average Weather in March in Coulee Dam Washington, United States
Daily high temperatures increase by 11°F, from 46°F to 58°F, rarely falling below 37°F or exceeding 68°F.
Daily low temperatures increase by 6°F, from 29°F to 35°F, rarely falling below 21°F or exceeding 42°F.
For reference, on July 31, the hottest day of the year, temperatures in Coulee Dam typically range from 61°F to 90°F, while on January 1, the coldest day of the year, they range from 21°F to 30°F.
Average High and Low Temperature in March
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on March. 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 March
Ivanivka, Ukraine (5,630 miles away); Kemaliye, Turkey (6,260 miles); and Suluktu, Kyrgyzstan (6,348 miles) are the far-away foreign places with temperatures most similar to Coulee Dam (view comparison).
The month of March in Coulee Dam experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 60% throughout the month.
The clearest day of the month is March 28, with clear, mostly clear, or partly cloudy conditions 42% of the time.
For reference, on January 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 70%, 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 March
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Coulee Dam, the chance of a wet day over the course of March is gradually decreasing, starting the month at 20% and ending it at 17%.
For reference, the year's highest daily chance of a wet day is 28% on November 28, and its lowest chance is 5% on August 18.
Over the course of March in Coulee Dam, the chance of a day with only rain remains an essentially constant 16% 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 2% to 0%.
Probability of Precipitation in March
The average sliding 31-day rainfall during March in Coulee Dam is essentially constant, remaining about 0.8 inches throughout, and rarely exceeding 2.0 inches or falling below 0.1 inches.
The highest average 31-day accumulation is 0.9 inches on March 12.
Average Monthly Rainfall in March
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 March in Coulee Dam is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.4 inches or falling to 0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in March
Over the course of March in Coulee Dam, 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, 45 minutes, implying an average daily increase of 3 minutes, 30 seconds, and weekly increase of 24 minutes, 27 seconds.
The shortest day of the month is March 1, with 11 hours, 4 minutes of daylight and the longest day is March 31, with 12 hours, 49 minutes of daylight.
Hours of Daylight and Twilight in March
The earliest sunrise of the month in Coulee Dam is 6:18 AM on March 10 and the latest sunrise is 58 minutes later at 7:16 AM on March 11.
The earliest sunset is 5:40 PM on March 1 and the latest sunset is 1 hour, 44 minutes later at 7:24 PM on March 31.
Daylight saving time (DST) starts at 3:00 AM on March 11, 2018, shifting sunrise and sunset to be an hour later.
For reference, on June 21, the longest day of the year, the Sun rises at 4:56 AM and sets 16 hours, 3 minutes later, at 8:59 PM, while on December 21, the shortest day of the year, it rises at 7:42 AM and sets 8 hours, 23 minutes later, at 4:05 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in March
The chance that a given day will be muggy in Coulee Dam is essentially constant during March, remaining around 0% throughout.
For reference, on July 17, 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 March
The average hourly wind speed in Coulee Dam is essentially constant during March, remaining within 0.2 miles per hour of 6.8 miles per hour throughout.
For reference, on March 26, the windiest day of the year, the daily average wind speed is 7.0 miles per hour, while on January 5, the calmest day of the year, the daily average wind speed is 5.9 miles per hour.
The highest daily average wind speed during March is 7.0 miles per hour on March 29.
Average Wind Speed in March
Wind Direction in March
The growing season in Coulee Dam typically lasts for 5.7 months (173 days), from around April 24 to around October 14, rarely starting before April 5 or after May 13, and rarely ending before September 27 or after October 31.
The month of March in Coulee Dam is very likely fully outside of the growing season, with the chance that a given day is in the growing season gradually increasing from 0% to 5% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in March
The average accumulated growing degree days in Coulee Dam are essentially constant during March, remaining within 15°F of 17°F throughout.
Growing Degree Days in March
The average daily incident shortwave solar energy in Coulee Dam is increasing during March, rising by 1.5 kWh, from 2.8 kWh to 4.3 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in March
For the purposes of this report, the geographical coordinates of Coulee Dam are 47.965 deg latitude, -118.976 deg longitude, and 1,768 ft elevation.
The topography within 2 miles of Coulee Dam contains very significant variations in elevation, with a maximum elevation change of 1,539 feet and an average elevation above sea level of 1,633 feet. Within 10 miles contains very significant variations in elevation (3,510 feet). Within 50 miles also contains extreme variations in elevation (6,355 feet).
The area within 2 miles of Coulee Dam is covered by shrubs (84%) and water (14%), within 10 miles by shrubs (68%) and cropland (11%), and within 50 miles by shrubs (48%) and cropland (16%).
This report illustrates the typical weather in Coulee Dam 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 Coulee Dam.
For each station, the records are corrected for the elevation difference between that station and Coulee Dam 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 Coulee Dam is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Coulee Dam and a given station.
The stations contributing to this reconstruction are: Omak Airport (44%, 68 kilometers, northwest); Ephrata Municipal Airport (33%, 84 kilometers, southwest); and Fairchild Air Force Base (23%, 106 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .