September weather forecastNew Brunswick, NJ
September
Weather in September
The transition from sultry summers to pleasant falls occurs in September in New Brunswick. While days are warm, nights begin to cool off and the humidity gradually recedes, offering soothing rainfall. This makes it a comfortable month, particularly until it gives way to a chillier October. The decline in temperature becomes evident as autumn starts to take control. This transformation becomes noticeable with temperatures ranging between 59.9°F (15.5°C) and 75.9°F (24.4°C) and a rainfall of 1.61" (41mm) ensuring a mildly moist transition to autumn.Temperature
New Brunswick's progression into September involves a gentle drop in the average high-temperature, from a warm 82.6°F (28.1°C) in August to a still moderately hot 75.9°F (24.4°C). New Brunswick witnesses an average low-temperature of 59.9°F (15.5°C) throughout the month of September.Humidity
In September, the average relative humidity is 75%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.6 days and typically collects 1.61" (41mm) of precipitation.Snowfall
In New Brunswick, snow does not fall in June through October.Daylight
In New Brunswick, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:41 pm EDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In New Brunswick, New Jersey, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 5 suggests this advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
New Brunswick, NJ
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in September
New Brunswick, 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
New Brunswick, NJ
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).
Average humidity in September
New Brunswick, NJ
- Average humidity in September: 75%
The months with the highest relative humidity are February, October and December (77%).
The months with the lowest relative humidity are April and August (72%).
Average rainfall in September
New Brunswick, NJ
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in September
New Brunswick, NJ
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in September
New Brunswick, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.5").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
New Brunswick, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
New Brunswick, 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 18min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
New Brunswick, NJ
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is July (11.1 days).
Average UV index in September
New Brunswick, NJ
- Average UV index in September: 5
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
New Brunswick, NJ
- Average cloud cover in September: 39
The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
New Brunswick, 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).
