August weather forecastGrand Valley, PA
August
Weather in August
August, the last month of the summer in Grand Valley, is another warm month, with an average temperature varying between 56.8°F (13.8°C) and 77.4°F (25.2°C).Temperature
August brings an average high-temperature of a still warm 77.4°F (25.2°C), nearly identical to the preceding month. During August, Grand Valley consistently records a temperature low averaging a refreshing 56.8°F (13.8°C).Humidity
The average relative humidity in August is 81%.Rainfall
In Grand Valley, in August, it is raining for 16.5 days, with typically 1.73" (44mm) of accumulated precipitation. Throughout the year, there are 160.2 rainfall days, and 23.43" (595mm) of precipitation is accumulated.Snowfall
In Grand Valley, snow does not fall in June through September.Daylight
The average length of the day in August in Grand Valley is 13h and 49min.On the first day of the month, sunrise is at 6:13 am and sunset at 8:35 pm. On the last day of August, sunrise is at 6:43 am and sunset at 7:52 pm EDT.
Sunshine
The months with the most sunshine in Grand Valley are July and August, with an average of 9.8h of sunshine.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 5 in August converts into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Grand Valley, PA
- Average high temperature in August: 77.4°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in August: 56.8°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in August
Grand Valley, PA
- Average pressure in August: 29.99"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in August
Grand Valley, PA
- Average wind speed in August: 5.5mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).
Average humidity in August
Grand Valley, PA
- Average humidity in August: 81%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is May (79%).
Average rainfall in August
Grand Valley, PA
- Average rainfall in August: 1.73"
The wettest month (with the highest rainfall) is April (2.32").
The driest month (with the least rainfall) is November (1.57").
Average rainfall days in August
Grand Valley, PA
- Average rainfall days in August: 16.5 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in August
Grand Valley, PA
- Average snowfall in August: 0"
The month with the highest snowfall is January (7.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Grand Valley, PA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (21.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Grand Valley, PA
- Average daylight in August: 13h and 48min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in August: 9h and 48min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 12min).
Average sunshine days in August
Grand Valley, PA
- Average sunshine days in August: 11.2 days
The month with the most sunshine days is October (13.3 days).
The month with the least sunshine days is January (5.3 days).
Average UV index in August
Grand Valley, PA
- Average UV index in August: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in August
Grand Valley, PA
- Average cloud cover in August: 37
The month with the most cloud cover is January (Cloud cover 78).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in August
Grand Valley, 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).
