Sussex County (Newton)
September
Weather in Sussex County, New Jersey for September 2026
Your guide to Sussex County weather in September - trends and predictions
In general, the average temperature in Sussex County at the beginning of September is 23.1 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 21 °F by the end of September.
With an average of 5 rainy days, Sussex County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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25
Dry days
5
Rainy days
0
Snow days
22°/13°
Temperatures
12 km/h
Avg max wind
74 %
Avg humidity
Sussex County Weather September
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Temperatures trend during September in Sussex County
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September weather in Sussex County day by day
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| 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 | 24° /15° | 0 mm | 6 | |
| Sept. 16 |  Cloudy | 23° /13° | 0 mm | 5 | |
| Sept. 17 |  Overcast | 20° /14° | 0 mm | 5 | |
| Sept. 18 | Fog | 22° /15° | 0 mm | 5 | |
| Sept. 19 | Overcast | 24° /16° | 0 mm | 5 | |
| Sept. 20 | Overcast | 20° /14° | 0 mm | 5 | |
| Sept. 21 | Cloudy | 20° /14° | 0 mm | 5 | |
| Sept. 22 | Cloudy | 21° /13° | 0 mm | 5 | |
| Sept. 23 | Overcast | 20° /15° | 0 mm | 5 | |
| Sept. 24 | Overcast | 21° /15° | 11.8 mm | 5 | |
| Sept. 25 |  Heavy rain at times | 20° /16° | 57.5 mm | 5 | |
| Sept. 26 | Light rain shower | 22° /17° | 20 mm | 5 | |
| Sept. 27 | Light rain shower | 22° /15° | 3.4 mm | 6 | |
| Sept. 28 | Overcast | 22° /16° | 41.8 mm | 5 | |
| Sept. 29 | Mist | 20° /14° | 0 mm | 5 | |
| Sept. 30 | Overcast | 20° /13° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Sussex County 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 Sussex County forecast closer to your planned date for the most up-to-date weather information.
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Sussex County in September - FAQ
What are the expected maximum and minimum temperatures in Sussex County during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Sussex County during September?
Significant rainfall exceeding 112.8 mm is expected in Sussex County during September, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Sussex County during September?
The average wind speed in Sussex County during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Sussex County
Explore the daily rainfall trends and prepare for Sussex Countys September weather 💧
UV exposure in Sussex County during September
Stay informed about UV levels for safe outdoor activities throughout the month of 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.
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