Middlesex County (Old Bridge)
September
Weather in Middlesex County, New Jersey for September 2026
Your guide to Middlesex County weather in September - trends and predictions
So far, September 2026 in Middlesex County is slightly warmer than the historical average by 1.9 °F.
The forecast for the upcoming days in Middlesex County predicts a temperature of 19.1 °F, which is slightly above the historical average.
In general, the average temperature in Middlesex County at the beginning of September is 26.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.9 °F by the end of September.
The climate of Middlesex County in September is notably wet, with an average of 12 rainy days, and a total of 154.3 mm of precipitation.
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Temperatures
Rain 🌧️
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18
Dry days
12
Rainy days
0
Snow days
24°/17°
Temperatures
16 km/h
Avg max wind
71 %
Avg humidity
Middlesex County Weather September
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Temperatures trend during September in Middlesex County
See the weather trend as well as the moving average line
September weather in Middlesex County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 28° /19° | 30.5 mm | 6 | |
| Sept. 2 |  Overcast | 25° /18° | 0.5 mm | 5 | |
| Sept. 3 |  Sunny | 26° /16° | 10 mm | 4 | |
| Sept. 4 | Sunny | 27° /17° | 5 mm | 7 | |
| Sept. 5 | Sunny | 28° /17° | 10.3 mm | 7 | |
| Sept. 6 | Overcast | 27° /18° | 27.4 mm | 7 | |
| Sept. 7 |  Moderate or heavy rain shower | 24° /14° | 21.3 mm | 5 | |
| Sept. 8 | Sunny | 25° /12° | 0 mm | 6 | |
| Sept. 9 |  Partly cloudy | 25° /14° | 0 mm | 5 | |
| Sept. 10 | Overcast | 26° /17° | 0 mm | 4 | |
| Sept. 11 | Sunny | 27° /17° | 0 mm | 7 | |
| Sept. 12 | Sunny | 26° /15° | 0 mm | 6 | |
| Sept. 13 | Sunny | 26° /17° | 16.1 mm | 5 | |
| Sept. 14 | Sunny | 26° /16° | 0 mm | 7 | |
| Sept. 15 | Sunny | 23° /16° | 0 mm | 6 | |
| Sept. 16 |  Cloudy | 24° /15° | 0 mm | 6 | |
| Sept. 17 | Overcast | 25° /17° | 1.4 mm | 5 | |
| Sept. 18 | Overcast | 25° /19° | 0.8 mm | 5 | |
| Sept. 19 | Overcast | 25° /17° | 2.1 mm | 5 | |
| Sept. 20 | Patchy rain possible | 21° /17° | 2.7 mm | 3 | |
| Sept. 21 | Overcast | 20° /17° | 1.7 mm | 5.1 | |
| Sept. 22 | Light rain shower | 19° /13° | 38.6 mm | 0.4 | |
| Sept. 23 | Patchy rain possible | 17° /12° | 8.9 mm | 2 | |
| Sept. 24 | Overcast | 17° /12° | 4.9 mm | 1.5 | |
| Sept. 25 | Overcast | 21° /12° | 3.5 mm | 5 | |
| Sept. 26 | Light rain shower | 13° /12° | 16.2 mm | 3 | |
| Sept. 27 | Patchy rain possible | 16° /13° | 1.7 mm | 4 | |
| Sept. 28 | Patchy rain possible | 17° /15° | 2.7 mm | 4 | |
| Sept. 29 | Light rain shower | 19° /16° | 10.1 mm | 4 | |
| Sept. 30 | Patchy rain possible | 22° /18° | 2.6 mm | 5 | |
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Important Notice
Our weather forecast for Middlesex 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 Middlesex County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Middlesex County in September - FAQ
What are the expected maximum and minimum temperatures in Middlesex County during September?
During September, expect a variety of temperatures with highs around 24° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Middlesex County during September?
Significant rainfall exceeding 154.3 mm is expected in Middlesex County during September, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Middlesex County during September?
The average wind speed in Middlesex County during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Middlesex County
Explore the daily rainfall trends and prepare for Middlesex Countys September weather 💧
Typically, Middlesex County has 12 rainy days in September with a total of 154.3 mm of rainfall.
UV exposure in Middlesex County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Middlesex County?Get accurate weather forecasts for Middlesex County, located at latitude 40.415 and longitude -74.365. Stay updated with localized weather information tailored for Middlesex County.
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