New Jersey (Newark)
September
Weather in New Jersey for September 2026
Your guide to New Jersey weather in September - trends and predictions
Until now, September 2026 in New Jersey has been nearly identical to the historical average, with a temperature of 25.4 °F (showing only a slight deviation of 0.3 °F).
The forecast for the next days in New Jersey predicts a temperature of 20.3 °F, which is cooler than the historical average.
In general, the average temperature in New Jersey at the beginning of September is 28.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.9 °F by the end of September.
New Jersey experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 220 mm.
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Temperatures
Rain 🌧️
More
9
Dry days
21
Rainy days
0
Snow days
24°/17°
Temperatures
16 km/h
Avg max wind
69 %
Avg humidity
New Jersey Weather September
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What’s the Weather Like in New Jersey This September?
Discover the average temperatures and weather trends across New Jersey’s cities this September.
Temperatures trend during September in New Jersey
See the weather trend as well as the moving average line
September weather in New Jersey day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 28° /18° | 51.1 mm | 5 | |
| Sept. 2 |  Partly cloudy | 27° /17° | 0.5 mm | 5 | |
| Sept. 3 | Partly cloudy | 28° /17° | 0.9 mm | 5 | |
| Sept. 4 | Sunny | 29° /19° | 0 mm | 7 | |
| Sept. 5 | Sunny | 29° /19° | 11.6 mm | 7 | |
| Sept. 6 | Partly cloudy | 30° /20° | 14.5 mm | 7 | |
| Sept. 7 |  Thundery outbreaks possible | 26° /17° | 24.1 mm | 6 | |
| Sept. 8 | Sunny | 27° /15° | 1.4 mm | 7 | |
| Sept. 9 | Partly cloudy | 27° /16° | 1.8 mm | 5 | |
| Sept. 10 |  Light rain shower | 26° /18° | 1.8 mm | 5 | |
| Sept. 11 | Light rain shower | 28° /18° | 1.4 mm | 6 | |
| Sept. 12 |  Cloudy | 27° /17° | 0 mm | 7 | |
| Sept. 13 |  Moderate or heavy rain shower | 26° /18° | 23.5 mm | 5 | |
| Sept. 14 |  Overcast | 26° /17° | 0 mm | 6 | |
| Sept. 15 | Overcast | 24° /16° | 2.9 mm | 6 | |
| Sept. 16 | Overcast | 25° /16° | 0 mm | 6 | |
| Sept. 17 | Overcast | 25° /17° | 1.3 mm | 6 | |
| Sept. 18 |  Mist | 24° /18° | 5.8 mm | 6 | |
| Sept. 19 | Overcast | 24° /16° | 3.9 mm | 5 | |
| Sept. 20 | Sunny | 21° /15° | 2.1 mm | 5 | |
| Sept. 21 | Overcast | 23° /14° | 0.4 mm | 5 | |
| Sept. 22 | Mist | 22° /13° | 0.7 mm | 4 | |
| Sept. 23 | Overcast | 21° /14° | 10.5 mm | 4 | |
| Sept. 24 | Overcast | 21° /14° | 1.9 mm | 5 | |
| Sept. 25 |  Moderate rain | 21° /15° | 24.7 mm | 4 | |
| Sept. 26 | Moderate or heavy rain shower | 22° /16° | 18.1 mm | 4 | |
| Sept. 27 | Moderate or heavy rain shower | 21° /14° | 19 mm | 4 | |
| Sept. 28 | Overcast | 21° /15° | 18.5 mm | 4 | |
| Sept. 29 | Overcast | 22° /14° | 0 mm | 4.2 | |
| Sept. 30 | Overcast | 25° /15° | 0 mm | 5.5 | |
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Important Notice
Our weather forecast for New Jersey in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the New Jersey forecast closer to your planned date for the most up-to-date weather information.
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New Jersey in September - FAQ
What are the expected maximum and minimum temperatures in New Jersey during September?
During September, expect a variety of temperatures with highs around 24° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in New Jersey during September?
Significant rainfall exceeding 220 mm is expected in New Jersey during September, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in New Jersey during September?
The average wind speed in New Jersey during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in New Jersey
Explore the daily rainfall trends and prepare for New Jerseys September weather 💧
Typically, New Jersey has 21 rainy days in September with a total of 220 mm of rainfall.
UV exposure in New Jersey during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Counties in New Jersey
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