Average Weather in August in Granite Falls Minnesota, United States
Daily high temperatures decrease by 4°F, from 81°F to 77°F, rarely falling below 67°F or exceeding 90°F.
Daily low temperatures decrease by 4°F, from 60°F to 56°F, rarely falling below 46°F or exceeding 69°F.
For reference, on July 18, the hottest day of the year, temperatures in Granite Falls typically range from 61°F to 82°F, while on January 15, the coldest day of the year, they range from 7°F to 24°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
Talghar, Kazakhstan (6,340 miles away); Jiayuguan, China (6,534 miles); and Hohhot, China (6,293 miles) are the far-away foreign places with temperatures most similar to Granite Falls (view comparison).
The month of August in Granite Falls experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 25% to 30%.
The clearest day of the month is August 1, with clear, mostly clear, or partly cloudy conditions 75% of the time.
For reference, on February 6, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 58%, while on July 28, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 75%.
Cloud Cover Categories in August
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 August is essentially constant, remaining around 31% throughout.
For reference, the year's highest daily chance of a wet day is 40% on June 12, and its lowest chance is 6% on January 15.
Probability of Precipitation in August
The average sliding 31-day rainfall during August in Granite Falls is essentially constant, remaining about 2.8 inches throughout, and rarely exceeding 4.7 inches or falling below 0.9 inches.
Average Monthly Rainfall in August
Over the course of August in Granite Falls, 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, 23 minutes, implying an average daily decrease of 2 minutes, 45 seconds, and weekly decrease of 19 minutes, 16 seconds.
The shortest day of the month is August 31, with 13 hours, 17 minutes of daylight and the longest day is August 1, with 14 hours, 40 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Granite Falls is 6:08 AM on August 1 and the latest sunrise is 35 minutes later at 6:43 AM on August 31.
The latest sunset is 8:48 PM on August 1 and the earliest sunset is 47 minutes earlier at 8:00 PM on August 31.
Daylight saving time is observed in Granite Falls 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 5:36 AM and sets 15 hours, 36 minutes later, at 9:11 PM, while on December 21, the shortest day of the year, it rises at 7:56 AM and sets 8 hours, 47 minutes later, at 4:44 PM.
Sunrise & Sunset with Twilight in August
The chance that a given day will be muggy in Granite Falls is rapidly decreasing during August, falling from 35% to 21% over the course of the month.
For reference, on July 20, the muggiest day of the year, there are muggy conditions 37% of the time, while on November 15, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in August
The average hourly wind speed in Granite Falls is increasing during August, increasing from 8.6 miles per hour to 9.7 miles per hour over the course of the month.
For reference, on April 8, the windiest day of the year, the daily average wind speed is 12.9 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 8.5 miles per hour.
The lowest daily average wind speed during August is 8.5 miles per hour on August 2.
Average Wind Speed in August
Wind Direction in August
The growing season in Granite Falls typically lasts for 5.2 months (156 days), from around April 28 to around October 1, rarely starting before April 10 or after May 17, and rarely ending before September 13 or after October 20.
The month of August in Granite Falls 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 Granite Falls are rapidly increasing during August, increasing by 550°F, from 1,606°F to 2,156°F, over the course of the month.
Growing Degree Days in August
The average daily incident shortwave solar energy in Granite Falls is decreasing during August, falling by 1.1 kWh, from 6.7 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 Granite Falls are 44.810 deg latitude, -95.546 deg longitude, and 1,020 ft elevation.
The topography within 2 miles of Granite Falls contains only modest variations in elevation, with a maximum elevation change of 187 feet and an average elevation above sea level of 965 feet. Within 10 miles also contains only modest variations in elevation (220 feet). Within 50 miles contains only modest variations in elevation (1,043 feet).
The area within 2 miles of Granite Falls is covered by cropland (69%) and trees (14%), within 10 miles by cropland (95%), and within 50 miles by cropland (94%).
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 4 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: Granite Falls Municipal Airport/Lenzen-Roe Memorial Field (79%, 6 kilometers, south); Montevideo-Chippewa County Airport (13%, 22 kilometers, northwest); Olivia Regional Airport (5.0%, 41 kilometers, east); and Willmar Municipal Airport-John L Rice Field (4.0%, 47 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .