Average Weather in August in South Coatesville Pennsylvania, United States
Daily high temperatures decrease by 4°F, from 84°F to 79°F, rarely falling below 71°F or exceeding 91°F.
Daily low temperatures decrease by 5°F, from 67°F to 62°F, rarely falling below 54°F or exceeding 73°F.
For reference, on July 21, the hottest day of the year, temperatures in South Coatesville typically range from 67°F to 84°F, while on January 30, the coldest day of the year, they range from 24°F to 39°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
Zebil, Romania (4,946 miles away); Saratovskaya, Russia (5,340 miles); and Sighnaghi, Georgia (5,727 miles) are the far-away foreign places with temperatures most similar to South Coatesville (view comparison).
The month of August in South Coatesville experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 37% throughout the month.
The clearest day of the month is August 28, with clear, mostly clear, or partly cloudy conditions 64% of the time.
For reference, on January 11, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 55%, while on September 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.
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 South Coatesville, the chance of a wet day over the course of August is rapidly decreasing, starting the month at 35% and ending it at 28%.
For reference, the year's highest daily chance of a wet day is 37% on June 16, and its lowest chance is 21% on January 29.
Probability of Precipitation in August
The average sliding 31-day rainfall during August in South Coatesville is essentially constant, remaining about 3.5 inches throughout, and rarely exceeding 5.9 inches or falling below 1.3 inches.
The lowest average 31-day accumulation is 3.4 inches on August 25.
Average Monthly Rainfall in August
Over the course of August in South Coatesville, 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, 9 minutes, implying an average daily decrease of 2 minutes, 18 seconds, and weekly decrease of 16 minutes, 4 seconds.
The shortest day of the month is August 31, with 13 hours, 7 minutes of daylight and the longest day is August 1, with 14 hours, 16 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in South Coatesville is 6:01 AM on August 1 and the latest sunrise is 28 minutes later at 6:29 AM on August 31.
The latest sunset is 8:17 PM on August 1 and the earliest sunset is 40 minutes earlier at 7:36 PM on August 31.
Daylight saving time is observed in South Coatesville during 2019, 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 5:34 AM and sets 15 hours, 1 minute later, at 8:35 PM, while on December 22, the shortest day of the year, it rises at 7:21 AM and sets 9 hours, 20 minutes later, at 4:41 PM.
Sunrise & Sunset with Twilight in August
The chance that a given day will be muggy in South Coatesville is very rapidly decreasing during August, falling from 62% to 39% over the course of the month.
For reference, on July 29, the muggiest day of the year, there are muggy conditions 62% of the time, while on January 24, 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 South Coatesville is essentially constant during August, remaining within 0.1 miles per hour of 4.5 miles per hour throughout.
For reference, on February 26, the windiest day of the year, the daily average wind speed is 7.8 miles per hour, while on August 12, the calmest day of the year, the daily average wind speed is 4.3 miles per hour.
The lowest daily average wind speed during August is 4.3 miles per hour on August 13.
Average Wind Speed in August
Wind Direction in August
South Coatesville is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in South Coatesville is essentially constant during August, remaining within 1°F of 74°F throughout.
The highest average surface water temperature during August is 74°F on August 10.
Average Water Temperature in August
The growing season in South Coatesville typically lasts for 6.8 months (208 days), from around April 7 to around November 2, rarely starting before March 20 or after April 24, and rarely ending before October 15 or after November 18.
The month of August in South Coatesville 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 South Coatesville are rapidly increasing during August, increasing by 675°F, from 1,966°F to 2,641°F, over the course of the month.
Growing Degree Days in August
The average daily incident shortwave solar energy in South Coatesville is gradually decreasing during August, falling by 0.7 kWh, from 6.4 kWh to 5.7 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 South Coatesville are 39.974 deg latitude, -75.820 deg longitude, and 482 ft elevation.
The topography within 2 miles of South Coatesville contains only modest variations in elevation, with a maximum elevation change of 397 feet and an average elevation above sea level of 456 feet. Within 10 miles contains only modest variations in elevation (814 feet). Within 50 miles contains significant variations in elevation (1,686 feet).
The area within 2 miles of South Coatesville is covered by artificial surfaces (46%), trees (38%), and cropland (15%), within 10 miles by cropland (54%) and trees (38%), and within 50 miles by cropland (43%) and trees (29%).
This report illustrates the typical weather in South Coatesville 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 South Coatesville.
For each station, the records are corrected for the elevation difference between that station and South Coatesville 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 South Coatesville is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between South Coatesville and a given station.
The stations contributing to this reconstruction are: Chester County G O Carlson Airport (84%, 4.1 kilometers, west); Pottstown Limerick Airport (6%, 37 kilometers, northeast); New Castle Airport (6%, 38 kilometers, southeast); and Philadelphia International Airport (3.8%, 52 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .