September weather forecastNew Derry, PA
September
Weather in September
September, the first month of the autumn in New Derry, is also a moderately hot month, with an average temperature fluctuating between 73.8°F (23.2°C) and 53.8°F (12.1°C).Temperature
The arrival of September correlates with a minor temperature reduction, down from August's 79.7°F (26.5°C) to a still moderately hot 73.8°F (23.2°C). Throughout September, New Derry anticipates an average low-temperature of 53.8°F (12.1°C).Humidity
In September, the average relative humidity in New Derry is 79%.Rainfall
In New Derry, in September, it is raining for 14.5 days, with typically 1.73" (44mm) of accumulated precipitation. In New Derry, during the entire year, the rain falls for 173.8 days and collects up to 25.55" (649mm) of precipitation.Snowfall
In New Derry, snow does not fall in May through September.Daylight
In New Derry, Pennsylvania, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:13 am and sunset at 7:00 pm EDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 4 in September translates into this advice:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
New Derry, PA
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in September
New Derry, PA
- Average pressure in September: 30.06"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 September
New Derry, PA
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
New Derry, PA
- Average humidity in September: 79%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April, June, July and August (78%).
Average rainfall in September
New Derry, PA
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is November (1.38").
Average rainfall days in September
New Derry, PA
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is May (20.4 days).
The month with the least rainy days is January (9.5 days).
Average snowfall in September
New Derry, PA
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.96").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
New Derry, PA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
New Derry, PA
- Average daylight in September: 12h and 24min
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 September: 8h and 42min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
New Derry, PA
- Average sunshine days in September: 13.4 days
The month with the most sunshine days is November (14.4 days).
The month with the least sunshine days is January (7 days).
Average UV index in September
New Derry, PA
- Average UV index in September: 4
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 September
New Derry, PA
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
New Derry, PA
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The month with the lowest visibility is January (4mi).
