September weather forecastPennington, NJ
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Pennington, New Jersey, with temperature in the range of an average low of 59°F (15°C) and an average high of 76.1°F (24.5°C).Temperature
The start of September involves a subtle temperature drop, shifting from a moderately hot 82.9°F (28.3°C) in August to a still warm 76.1°F (24.5°C). During the month of September, Pennington anticipates a mean low-temperature of 59°F (15°C).Humidity
The average relative humidity in September is 76%.Rainfall
In Pennington, during September, the rain falls for 11.6 days and regularly aggregates up to 0.98" (25mm) of precipitation. In Pennington, during the entire year, the rain falls for 138.1 days and collects up to 16.5" (419mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 27min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:42 pm EDT.
Sunshine
In Pennington, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Guard yourself - An obligation to protect skin and eyes from harm exists. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Pennington, NJ
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in September: 59°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Pennington, NJ
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Pennington, NJ
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Pennington, NJ
- Average humidity in September: 76%
The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April and July (73%).
Average rainfall in September
Pennington, NJ
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is July (2.24").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in September
Pennington, NJ
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is November (7.2 days).
Average snowfall in September
Pennington, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Pennington, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Pennington, NJ
- 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 48min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Pennington, NJ
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is January (20.7 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in September
Pennington, NJ
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Pennington, NJ
- Average cloud cover in September: 37
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Pennington, NJ
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
