Weather in Sussex County, New Jersey for September 2025
Rip Current Statement - See hour by hour.
Until now, September 2025 in Sussex County has been nearly identical to the historical average, with a temperature of 23 °F (showing only a slight deviation of -0.4 °F).
The forecast for the next days in Sussex County predicts temperatures to be around 24 °F, close to the historical average.
In general, the average temperature in Sussex County at the beginning of September is 23.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 24.7 °F by the end of September.
With an average of 5 rainy days, Sussex County experiences minimal rainfall in September.
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Sussex County Weather September
Temperatures trend during September in Sussex County
September weather in Sussex County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 24° /17° | 2 mm | 6 | |
| Sept. 2 |  Partly cloudy | 25° /13° | 0 mm | 7 | |
| Sept. 3 |  Sunny | 22° /10° | 0 mm | 6 | |
| Sept. 4 | Sunny | 24° /12° | 0 mm | 6 | |
| Sept. 5 | Sunny | 25° /14° | 20 mm | 6 | |
| Sept. 6 |  Fog | 24° /15° | 2.4 mm | 6 | |
| Sept. 7 | Light rain shower | 18° /11° | 32.1 mm | 4 | |
| Sept. 8 | Sunny | 21° /8° | 0 mm | 6 | |
| Sept. 9 | Partly cloudy | 22° /10° | 0 mm | 6 | |
| Sept. 10 | Sunny | 22° /12° | 0 mm | 6 | |
| Sept. 11 | Partly cloudy | 24° /12° | 0 mm | 7 | |
| Sept. 12 | Sunny | 25° /14° | 0 mm | 7 | |
| Sept. 13 | Sunny | 25° /14° | 0 mm | 6 | |
| Sept. 14 | Partly cloudy | 27° /14° | 0 mm | 7 | |
| Sept. 15 | Partly cloudy | 26° /14° | 0 mm | 7 | |
| Sept. 16 | Patchy rain possible | 24° /16° | 1.2 mm | 1.4 | |
| Sept. 17 | Patchy rain possible | 15° /14° | 4.1 mm | 0.8 | |
| Sept. 18 | Partly cloudy | 24° /14° | 0 mm | 1.4 | |
| Sept. 19 | Sunny | 26° /15° | 0 mm | 1.4 | |
| Sept. 20 | Sunny | 21° /9° | 0 mm | 0 | |
| Sept. 21 | Sunny | 22° /10° | 0 mm | 4 | |
| Sept. 22 | Sunny | 24° /9° | 0 mm | 5 | |
| Sept. 23 | Sunny | 28° /13° | 0 mm | 5 | |
| Sept. 24 | Partly cloudy | 29° /16° | 0 mm | 6 | |
| Sept. 25 | Patchy rain possible | 27° /19° | 2 mm | 5 | |
| Sept. 26 | Sunny | 23° /13° | 0 mm | 5 | |
| Sept. 27 | Sunny | 25° /11° | 0 mm | 5 | |
| Sept. 28 | Sunny | 24° /9° | 0 mm | 5 | |
| Sept. 29 | Sunny | 28° /12° | 0 mm | 5 | |
| Sept. 30 |  Overcast | 17° /13° | 0 mm | 4 | |
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Sussex County in September - FAQ
September rainfall patterns in Sussex County
UV exposure in Sussex County during September
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Where is Sussex County?Get accurate weather forecasts for Sussex County, located at latitude 41.058 and longitude -74.753. Stay updated with localized weather information tailored for Sussex County.