Weather in Sussex County, New Jersey for September 2026
Wind Advisory - See hour by hour.
Until now, September 2026 in Sussex County has been nearly identical to the historical average, with a temperature of 23.2 °F (showing only a slight deviation of 0.2 °F).
The forecast for the next days in Sussex County predicts temperatures to be around 17 °F, close to the historical average.
In general, the average temperature in Sussex County at the beginning of September is 24.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.4 °F by the end of September.
Sussex County experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 191 mm.
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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 | 27° /17° | 2.9 mm | 4 | |
| Sept. 2 |  Partly cloudy | 23° /15° | 1.3 mm | 5 | |
| Sept. 3 |  Sunny | 24° /12° | 2.8 mm | 4 | |
| Sept. 4 | Sunny | 25° /14° | 0 mm | 6 | |
| Sept. 5 | Sunny | 25° /15° | 13.3 mm | 7 | |
| Sept. 6 |  Fog | 24° /15° | 1.6 mm | 6 | |
| Sept. 7 | Light rain shower | 21° /11° | 21.4 mm | 5 | |
| Sept. 8 | Sunny | 22° /9° | 0 mm | 6 | |
| Sept. 9 |  Overcast | 23° /12° | 0 mm | 4 | |
| Sept. 10 | Overcast | 24° /14° | 0.3 mm | 4 | |
| Sept. 11 | Partly cloudy | 25° /13° | 0 mm | 6 | |
| Sept. 12 | Sunny | 25° /12° | 0 mm | 6 | |
| Sept. 13 | Sunny | 25° /15° | 5.3 mm | 5 | |
| Sept. 14 | Partly cloudy | 25° /13° | 0 mm | 7 | |
| Sept. 15 | Partly cloudy | 23° /13° | 0 mm | 6 | |
| Sept. 16 |  Cloudy | 24° /12° | 0 mm | 6 | |
| Sept. 17 | Overcast | 23° /15° | 0.4 mm | 5 | |
| Sept. 18 | Fog | 23° /15° | 0 mm | 5 | |
| Sept. 19 | Overcast | 23° /15° | 0 mm | 5 | |
| Sept. 20 | Overcast | 20° /14° | 4.4 mm | 4 | |
| Sept. 21 | Cloudy | 20° /13° | 0 mm | 3 | |
| Sept. 22 | Cloudy | 20° /12° | 2.4 mm | 4 | |
| Sept. 23 | Overcast | 20° /12° | 0 mm | 4 | |
| Sept. 24 | Overcast | 20° /11° | 7.9 mm | 5 | |
| Sept. 25 |  Heavy rain at times | 20° /13° | 38.3 mm | 3 | |
| Sept. 26 | Light rain shower | 22° /17° | 20 mm | 5 | |
| Sept. 27 | Light rain shower | 14° /11° | 27.9 mm | 0.5 | |
| Sept. 28 | Light rain shower | 13° /11° | 16.3 mm | 0.2 | |
| Sept. 29 | Fog | 18° /11° | 0.3 mm | 4 | |
| Sept. 30 | Overcast | 22° /14° | 0 mm | 5.4 | |
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Sussex County in September - FAQ
What are the expected maximum and minimum temperatures in Sussex County during September?
How much rainfall should be expected in Sussex County during September?
What are the typical wind conditions in Sussex County during September?
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.