Trenton (NJ)
September
Weather in Trenton, New Jersey for September 2026
Your guide to Trenton weather in September - trends and predictions
In general, the average temperature in Trenton at the beginning of September is 25.9 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 25.3 °F by the end of September.
Trenton experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 237.2 mm.
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Temperatures
Rain 🌧️
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23
Dry days
7
Rainy days
0
Snow days
25°/17°
Temperatures
14 km/h
Avg max wind
75 %
Avg humidity
Trenton Weather September
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Temperatures trend during September in Trenton
See the weather trend as well as the moving average line
September weather in Trenton day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 24° /16° | 0 mm | 6 | |
| Sept. 2 |  Partly cloudy | 27° /16° | 0 mm | 8 | |
| Sept. 3 |  Mist | 23° /14° | 0 mm | 7 | |
| Sept. 4 | Mist | 27° /16° | 0 mm | 7 | |
| Sept. 5 | Overcast | 31° /19° | 29.9 mm | 6 | |
| Sept. 6 |  Thundery outbreaks possible | 31° /22° | 53.6 mm | 8 | |
| Sept. 7 |  Light rain shower | 18° /15° | 69.1 mm | 3 | |
| Sept. 8 | Mist | 22° /11° | 0 mm | 8 | |
| Sept. 9 | Partly cloudy | 22° /14° | 0 mm | 8 | |
| Sept. 10 | Overcast | 19° /15° | 0 mm | 2 | |
| Sept. 11 | Partly cloudy | 26° /15° | 0 mm | 7 | |
| Sept. 12 | Partly cloudy | 25° /16° | 0 mm | 7 | |
| Sept. 13 |  Light rain | 24° /17° | 4 mm | 5 | |
| Sept. 14 | Overcast | 27° /18° | 0 mm | 7 | |
| Sept. 15 | Mist | 25° /17° | 0 mm | 7 | |
| Sept. 16 | Mist | 24° /16° | 0 mm | 4 | |
| Sept. 17 | Overcast | 20° /15° | 0 mm | 1 | |
| Sept. 18 | Fog | 24° /18° | 0 mm | 4 | |
| Sept. 19 | Overcast | 27° /17° | 0 mm | 6 | |
| Sept. 20 | Overcast | 19° /16° | 0 mm | 2 | |
| Sept. 21 | Overcast | 20° /14° | 0 mm | 4 | |
| Sept. 22 | Overcast | 25° /16° | 0 mm | 1 | |
| Sept. 23 | Overcast | 27° /19° | 0 mm | 3 | |
| Sept. 24 | Fog | 27° /19° | 0 mm | 3 | |
| Sept. 25 |  Moderate or heavy rain shower | 25° /20° | 29.3 mm | 1 | |
| Sept. 26 | Mist | 26° /19° | 7 mm | 5 | |
| Sept. 27 | Mist | 27° /16° | 0 mm | 5 | |
| Sept. 28 |  Heavy rain | 23° /17° | 44.3 mm | 2 | |
| Sept. 29 | Fog | 24° /16° | 0 mm | 2 | |
| Sept. 30 | Overcast | 25° /16° | 0 mm | 1 | |
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Important Notice
Our weather forecast for Trenton 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 Trenton forecast closer to your planned date for the most up-to-date weather information.
Change Month
Trenton in September - FAQ
What are the expected maximum and minimum temperatures in Trenton during September?
During September, expect a variety of temperatures with highs around 25° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Trenton during September?
Significant rainfall exceeding 237.2 mm is expected in Trenton during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Trenton during September?
The average wind speed in Trenton during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Trenton
Explore the daily rainfall trends and prepare for Trentons September weather 💧
Typically, Trenton has 7 rainy days in September with a total of 237.2 mm of rainfall.
UV exposure in Trenton during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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