August weather forecastMount Gretna, PA
August
Weather in August
August, the last month of the summer in Mount Gretna, is another warm month, with an average temperature varying between 61.7°F (16.5°C) and 79.9°F (26.6°C).Temperature
In August, Mount Gretna's weather conditions record an average high-temperature of a still warm 79.9°F (26.6°C), demonstrating little divergence from the preceding month. Throughout August, the nighttime temperature averages to an enjoyable 61.7°F (16.5°C).Humidity
In Mount Gretna, the average relative humidity in August is 80%.Rainfall
August is the month with the most rainfall. Rain falls for 14.7 days and accumulates 2.13" (54mm) of precipitation.Snowfall
In Mount Gretna, snow does not fall in June through September.Daylight
In August, the average length of the day is 13h and 43min.On the first day of the month, sunrise is at 6:04 am and sunset at 8:19 pm. On the last day of August, sunrise is at 6:33 am and sunset at 7:38 pm EDT.
Sunshine
The average sunshine in August is 9.8h.UV index
The average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In August, a regular UV index of 5 translates into these guidelines:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Mount Gretna, PA
- Average high temperature in August: 79.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in August: 61.7°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in August
Mount Gretna, PA
- Average pressure in August: 30"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in August
Mount Gretna, PA
- Average wind speed in August: 4.8mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in August
Mount Gretna, PA
- Average humidity in August: 80%
The months with the highest relative humidity are February, May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in August
Mount Gretna, PA
- Average rainfall in August: 2.13"
The wettest month (with the highest rainfall) is August (2.13").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in August
Mount Gretna, PA
- Average rainfall days in August: 14.7 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.7 days).
Average snowfall in August
Mount Gretna, PA
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Mount Gretna, PA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Mount Gretna, PA
- Average daylight in August: 13h and 42min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in August: 9h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in August
Mount Gretna, PA
- Average sunshine days in August: 13.4 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in August
Mount Gretna, PA
- Average UV index in August: 5
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in August
Mount Gretna, PA
- Average cloud cover in August: 34
The months with the most cloud cover are February and December (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in August
Mount Gretna, PA
- Average visibility in August: 5mi
The months with the highest visibility are January, February, March, April, June, July, November and December (6mi).
The months with the lowest visibility are May, August, September and October (5mi).
