August weather forecastDerry, PA
August
Weather in August
August, the last month of the summer in Derry, is also a moderately hot month, with temperature in the range of an average high of 79.3°F (26.3°C) and an average low of 57.6°F (14.2°C).Temperature
Derry registers an average high-temperature of a still warm 79.3°F (26.3°C) with the arrival of August, showing minor deviation from the preceding month. August's nights in Derry exhibit a sharp contrast from day highs, with an average temperature of 57.6°F (14.2°C).Humidity
The months with the lowest humidity are April, July and August, with an average relative humidity of 78%.Rainfall
In Derry, in August, during 14.8 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, there are 156.2 rainfall days, and 19.45" (494mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Derry, the average length of the day in August is 13h and 43min.On the first day of August, sunrise is at 6:15 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 7:50 pm EDT.
Sunshine
July and August, with an average of 10h of sunshine, are months with the most sunshine.UV index
In August, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In August, the maximum UV index of 5 suggests these recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Derry, PA
- Average high temperature in August: 79.3°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 (32.2°F).
- Average low temperature in August: 57.6°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in August
Derry, PA
- Average pressure in August: 30"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in August
Derry, PA
- Average wind speed in August: 5mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in August
Derry, PA
- Average humidity in August: 78%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April, July and August (78%).
Average rainfall in August
Derry, PA
- Average rainfall in August: 1.54"
The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is November (1.02").
Average rainfall days in August
Derry, PA
- Average rainfall days in August: 14.8 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (7.6 days).
Average snowfall in August
Derry, PA
- Average snowfall in August: 0"
The month with the highest snowfall is January (3.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Derry, PA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Derry, 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: 10h
The months with the most sunshine are July and August (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 3h).
Average sunshine days in August
Derry, PA
- Average sunshine days in August: 13.8 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is May (8.9 days).
Average UV index in August
Derry, PA
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Derry, PA
- Average cloud cover in August: 36
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in August
Derry, PA
- Average visibility in August: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
