September weather forecastSouth Orange, NJ
September
Weather in September
September marks the onset of fall in South Orange, New Jersey. Following August, the month witnesses a drop in temperatures, with shorter daylight hours as a sign of the changing season. Reduction in rainfall and cooling temperatures become more apparent towards the month's end. This time of year is well-regarded for its colorful autumn foliage and moderate weather, ideal for exploring the outdoors.Temperature
The shift from August to September in South Orange coincides with a small decrease in the average high-temperature, down to a still warm 75°F (23.9°C) from 81.9°F (27.7°C). Throughout September, the nighttime temperature in South Orange averages to a moderate 60.1°F (15.6°C).Humidity
In South Orange, the average relative humidity in September is 74%.Rainfall
September is the month with the least rainfall. Rain falls for 13.1 days and accumulates 2.01" (51mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 27min.On the first day of September in South Orange, New Jersey, sunrise is at 6:24 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:40 pm EDT.
Sunshine
In September, the average sunshine in South Orange is 8.9h.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 exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Undertake precautions - Guarding against sun damage is counselled. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Orange, NJ
- Average high temperature in September: 75°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
South Orange, 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
South Orange, NJ
- Average wind speed in September: 6.5mph
The windiest months (with the highest average wind speed) are January and March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
South Orange, NJ
- Average humidity in September: 74%
The months with the highest relative humidity are February and December (77%).
The month with the lowest relative humidity is August (71%).
Average rainfall in September
South Orange, NJ
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is December (3.54").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in September
South Orange, NJ
- Average rainfall days in September: 13.1 days
The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in September
South Orange, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
South Orange, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
South Orange, NJ
- Average daylight in September: 12h and 30min
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 18min).
- Average sunshine in September: 8h and 54min
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 42min).
Average sunshine days in September
South Orange, NJ
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
South Orange, NJ
- Average UV index in September: 4
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, March, November and December (UV index 2).
Average cloud cover in September
South Orange, NJ
- Average cloud cover in September: 35
The month with the most cloud cover is March (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in September
South Orange, 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).
