August weather forecastSlippery Rock, PA
August
Weather in August
August, the last month of the summer in Slippery Rock, is also a moderately hot month, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 58.3°F (14.6°C).Temperature
August's advent notes a subtle adjustment in average high-temperature to a still moderately hot 79.7°F (26.5°C) from July. In August, the temperature drops to an average of 58.3°F (14.6°C) at night.Humidity
April through August, with an average relative humidity of 79%, are the least humid months.Rainfall
In Slippery Rock, during August, the rain falls for 17.3 days and regularly aggregates up to 2.56" (65mm) of precipitation. Throughout the year, there are 177.8 rainfall days, and 36.65" (931mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In August, the average length of the day is 13h and 46min.On the first day of August, sunrise is at 6:16 am and sunset at 8:36 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 7:54 pm EDT.
Sunshine
July and August, with an average of 9.7h of sunshine, are months with the most sunshine.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In August, a daily maximum UV index of 5 leads to the following instructions:
Be vigilant - A duty to shield skin and eyes from injury exists. When the Sun is at its strongest around midday, find shade and limit exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Slippery Rock, PA
- Average high temperature in August: 79.7°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in August: 58.3°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in August
Slippery Rock, PA
- Average pressure in August: 29.99"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in August
Slippery Rock, PA
- Average wind speed in August: 5.2mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in August
Slippery Rock, PA
- Average humidity in August: 79%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April, May, June, July and August (79%).
Average rainfall in August
Slippery Rock, PA
- Average rainfall in August: 2.56"
The wettest month (with the highest rainfall) is April (3.74").
The driest month (with the least rainfall) is November (2.36").
Average rainfall days in August
Slippery Rock, PA
- Average rainfall days in August: 17.3 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in August
Slippery Rock, PA
- Average snowfall in August: 0"
The month with the highest snowfall is January (8.54").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Slippery Rock, PA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (19.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Slippery Rock, PA
- Average daylight in August: 13h and 48min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in August: 9h and 42min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in August
Slippery Rock, PA
- Average sunshine days in August: 11.5 days
The month with the most sunshine days is November (13.1 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in August
Slippery Rock, PA
- Average UV index in August: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Slippery Rock, PA
- Average cloud cover in August: 38
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in August
Slippery Rock, PA
- Average visibility in August: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).
