New Jersey
September
Weather in New Jersey for September 2025
Your guide to New Jersey weather in September - trends and predictions
In general, the average temperature in New Jersey at the beginning of September is 28.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.4 °F by the end of September.
The climate of New Jersey in September is notably wet, with an average of 14 rainy days.
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16
Dry days
14
Rainy days
0
Snow days
25°/16°
Temperatures
16 km/h
Avg max wind
69 %
Avg humidity
New Jersey in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2  28° | 3 29° | 4 30° | 5 30° | 6 30° | 7  28° |
| 8  27° | 9  28° | 10 27° | 11 28° | 12  27° | 13  26° | 14  26° |
| 15 23° | 16 25° | 17  23° | 18 21° | 19  22° | 20 23° | 21 25° |
| 22 22° | 23  19° | 24 19° | 25  17° | 26 22° | 27 21° | 28 21° |
| 29  17° | 30 19° |
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Temperatures trend during September in New Jersey
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 27° /18° | 1.9 mm | 7 | |
| Sept. 2 | Partly cloudy | 28° /16° | 0 mm | 7 | |
| Sept. 3 | Partly cloudy | 29° /16° | 0 mm | 7 | |
| Sept. 4 | Partly cloudy | 30° /19° | 0 mm | 8 | |
| Sept. 5 | Partly cloudy | 30° /20° | 0 mm | 8 | |
| Sept. 6 | Partly cloudy | 30° /21° | 0 mm | 7 | |
| Sept. 7 | Thundery outbreaks possible | 28° /20° | 4.8 mm | 7 | |
| Sept. 8 | Light rain shower | 27° /17° | 2.7 mm | 7 | |
| Sept. 9 | Patchy light rain with thunder | 28° /17° | 3.5 mm | 7 | |
| Sept. 10 | Light rain shower | 27° /19° | 3 mm | 7 | |
| Sept. 11 | Light rain shower | 28° /18° | 2.8 mm | 7 | |
| Sept. 12 | Cloudy | 27° /18° | 0 mm | 7 | |
| Sept. 13 | Moderate or heavy rain shower | 26° /17° | 14.1 mm | 6 | |
| Sept. 14 | Overcast | 26° /17° | 0 mm | 6 | |
| Sept. 15 | Overcast | 23° /16° | 0 mm | 6 | |
| Sept. 16 | Overcast | 25° /16° | 0 mm | 6 | |
| Sept. 17 | Light rain | 23° /15° | 1.6 mm | 6 | |
| Sept. 18 | Moderate or heavy rain shower | 21° /16° | 11.6 mm | 5 | |
| Sept. 19 | Mist | 22° /16° | 7.8 mm | 5 | |
| Sept. 20 | Sunny | 23° /15° | 0 mm | 6 | |
| Sept. 21 | Partly cloudy | 25° /14° | 0 mm | 6 | |
| Sept. 22 | Mist | 22° /13° | 0 mm | 5 | |
| Sept. 23 | Heavy rain | 19° /14° | 21 mm | 5 | |
| Sept. 24 | Light rain | 19° /14° | 3.9 mm | 5 | |
| Sept. 25 | Moderate rain | 17° /14° | 33.2 mm | 4 | |
| Sept. 26 | Patchy rain possible | 22° /15° | 23.1 mm | 5 | |
| Sept. 27 | Cloudy | 21° /13° | 8.9 mm | 5 | |
| Sept. 28 | Overcast | 21° /15° | 0 mm | 5 | |
| Sept. 29 | Moderate or heavy rain with thunder | 17° /15° | 25.8 mm | 4 | |
| Sept. 30 | Light rain | 19° /14° | 9.2 mm | 4 | |
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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.
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 25° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in New Jersey during September?
Significant rainfall exceeding 244.6 mm is expected in New Jersey during September, occurring over more than 14 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 💧
UV exposure in New Jersey during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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