Average Weather in August in Chewelah Washington, United States
Daily high temperatures decrease by 6°F, from 89°F to 82°F, rarely falling below 71°F or exceeding 98°F. The highest daily average high temperature is 89°F on August 4.
Daily low temperatures decrease by 5°F, from 55°F to 50°F, rarely falling below 42°F or exceeding 62°F. The highest daily average low temperature is 55°F on August 1.
For reference, on August 3, the hottest day of the year, temperatures in Chewelah typically range from 55°F to 89°F, while on January 1, the coldest day of the year, they range from 22°F to 32°F.
Average High and Low Temperature in August
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. 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 August
The month of August in Chewelah experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 22% to 32%. The lowest chance of overcast or mostly cloudy conditions is 22% on August 3.
The clearest day of the month is August 3, with clear, mostly clear, or partly cloudy conditions 78% of the time.
For reference, on January 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 75%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 78%.
Cloud Cover Categories in August
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 Chewelah, the chance of a wet day over the course of August is essentially constant, remaining around 9% throughout.
For reference, the year's highest daily chance of a wet day is 37% on November 27, and its lowest chance is 8% on August 20.
Probability of Precipitation in August
The average sliding 31-day rainfall during August in Chewelah is essentially constant, remaining about 0.5 inches throughout, and rarely exceeding 1.3 inches.
The lowest average 31-day accumulation is 0.5 inches on August 10.
Average Monthly Rainfall in August
Over the course of August in Chewelah, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 34 minutes, implying an average daily decrease of 3 minutes, 8 seconds, and weekly decrease of 21 minutes, 59 seconds.
The shortest day of the month is August 31, with 13 hours, 27 minutes of daylight and the longest day is August 1, with 15 hours, 1 minute of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Chewelah is 5:26 AM on August 1 and the latest sunrise is 41 minutes later at 6:07 AM on August 31.
The latest sunset is 8:27 PM on August 1 and the earliest sunset is 53 minutes earlier at 7:33 PM on August 31.
Daylight saving time is observed in Chewelah during 2018, but it neither starts nor ends during August, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 4:49 AM and sets 16 hours, 5 minutes later, at 8:55 PM, while on December 21, the shortest day of the year, it rises at 7:39 AM and sets 8 hours, 20 minutes later, at 3:58 PM.
Sunrise & Sunset with Twilight in August
The chance that a given day will be muggy in Chewelah is essentially constant during August, remaining around 0% throughout.
For reference, on July 6, 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 August
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Chewelah is essentially constant during August, remaining around 4.0 miles per hour throughout.
For reference, on April 18, the windiest day of the year, the daily average wind speed is 4.4 miles per hour, while on January 5, the calmest day of the year, the daily average wind speed is 3.8 miles per hour.
The lowest daily average wind speed during August is 3.9 miles per hour on August 6.
Average Wind Speed in August
Wind Direction in August
The growing season in Chewelah typically lasts for 5.0 months (154 days), from around May 1 to around October 2, rarely starting before April 9 or after May 20, and rarely ending before September 14 or after October 19.
The month of August in Chewelah is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in August
The average accumulated growing degree days in Chewelah are rapidly increasing during August, increasing by 544°F, from 1,288°F to 1,832°F, over the course of the month.
Growing Degree Days in August
The average daily incident shortwave solar energy in Chewelah is decreasing during August, falling by 1.5 kWh, from 7.1 kWh to 5.6 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in August
For the purposes of this report, the geographical coordinates of Chewelah are 48.276 deg latitude, -117.716 deg longitude, and 1,795 ft elevation.
The topography within 2 miles of Chewelah contains very significant variations in elevation, with a maximum elevation change of 1,430 feet and an average elevation above sea level of 1,757 feet. Within 10 miles contains very significant variations in elevation (4,167 feet). Within 50 miles also contains extreme variations in elevation (6,007 feet).
The area within 2 miles of Chewelah is covered by sparse vegetation (47%), cropland (23%), and shrubs (19%), within 10 miles by trees (45%) and shrubs (30%), and within 50 miles by trees (47%) and shrubs (30%).
This report illustrates the typical weather in Chewelah 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 Chewelah.
For each station, the records are corrected for the elevation difference between that station and Chewelah 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 Chewelah is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Chewelah and a given station.
The stations contributing to this reconstruction are: Deer Park Airport (68%, 40 kilometers, southeast); West Kootenay Regional Airport (20%, 94 kilometers, north); and Omak Airport (12%, 135 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .