September weather forecastSouth Seaville, NJ
September
Weather in September
September, the first month of the autumn in South Seaville, is also a moderately hot month, with an average temperature varying between 66.2°F (19°C) and 73.9°F (23.3°C).Temperature
September is marked by a subtle drop in average high-temperatures, transitioning from a warm 79.9°F (26.6°C) in August to a still moderately hot 73.9°F (23.3°C). South Seaville's nighttime temperature in September consistently rests at a comfortable 66.2°F (19°C).Humidity
In South Seaville, the average relative humidity in September is 77%.Rainfall
In South Seaville, during September, the rain falls for 10.6 days and regularly aggregates up to 0.91" (23mm) of precipitation. Throughout the year, there are 130.8 rainfall days, and 13.23" (336mm) of precipitation is accumulated.Snowfall
In South Seaville, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:29 pm. On the last day of September, in South Seaville, sunrise is at 6:54 am and sunset at 6:42 pm EDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In South Seaville, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: In September, a regular UV index of 5 translates into these guidelines:
Guard yourself - Avoiding sunburn is suggested. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Seaville, NJ
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in September: 66.2°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).
Average pressure in September
South Seaville, NJ
- Average pressure in September: 30.04"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 September
South Seaville, NJ
- Average wind speed in September: 9.5mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in September
South Seaville, NJ
- Average humidity in September: 77%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is November (73%).
Average rainfall in September
South Seaville, NJ
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is August (1.61").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in September
South Seaville, NJ
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (7 days).
Average snowfall in September
South Seaville, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.59").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
South Seaville, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
South Seaville, NJ
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
South Seaville, NJ
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is July (13.4 days).
Average UV index in September
South Seaville, NJ
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
South Seaville, NJ
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in September
South Seaville, NJ
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
