Morris County (Parsippany)
September
Weather in Morris County, New Jersey for September 2026
Your guide to Morris County weather in September - trends and predictions
Wind Advisory - See hour by hour.
So far, September 2026 in Morris County is slightly warmer than the historical average by 0.6 °F.
The forecast for the next days in Morris County predicts temperatures to be around 19 °F, close to the historical average.
In general, the average temperature in Morris County at the beginning of September is 26 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °F by the end of September.
The climate of Morris County in September is notably wet, with an average of 12 rainy days, and a total of 204.4 mm of precipitation.
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Temperatures
Rain 🌧️
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18
Dry days
12
Rainy days
0
Snow days
23°/15°
Temperatures
13 km/h
Avg max wind
70 %
Avg humidity
Morris County Weather September
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Temperatures trend during September in Morris County
See the weather trend as well as the moving average line
September weather in Morris County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 28° /18° | 13.2 mm | 5 | |
| Sept. 2 |  Overcast | 25° /16° | 0.9 mm | 4 | |
| Sept. 3 |  Sunny | 26° /14° | 1.8 mm | 4 | |
| Sept. 4 | Sunny | 27° /15° | 0.1 mm | 7 | |
| Sept. 5 | Sunny | 27° /16° | 16.3 mm | 6 | |
| Sept. 6 | Overcast | 27° /17° | 2.8 mm | 6 | |
| Sept. 7 | Light rain shower | 22° /12° | 31 mm | 5 | |
| Sept. 8 | Sunny | 25° /11° | 0 mm | 6 | |
| Sept. 9 |  Partly cloudy | 25° /12° | 0 mm | 5 | |
| Sept. 10 | Sunny | 26° /15° | 0.4 mm | 5 | |
| Sept. 11 | Sunny | 27° /15° | 0 mm | 7 | |
| Sept. 12 | Sunny | 27° /14° | 0 mm | 6 | |
| Sept. 13 | Sunny | 26° /16° | 11.5 mm | 5 | |
| Sept. 14 | Sunny | 27° /15° | 0 mm | 7 | |
| Sept. 15 | Partly cloudy | 25° /15° | 2.6 mm | 6 | |
| Sept. 16 | Overcast | 25° /14° | 0 mm | 6 | |
| Sept. 17 | Overcast | 24° /16° | 0.1 mm | 5 | |
| Sept. 18 |  Mist | 24° /17° | 0 mm | 5 | |
| Sept. 19 | Overcast | 24° /16° | 2.5 mm | 5 | |
| Sept. 20 | Overcast | 20° /15° | 4.8 mm | 4 | |
| Sept. 21 | Overcast | 22° /15° | 0.8 mm | 4 | |
| Sept. 22 | Overcast | 21° /13° | 1.7 mm | 4 | |
| Sept. 23 | Overcast | 21° /14° | 0.5 mm | 4 | |
| Sept. 24 |  Cloudy | 22° /13° | 1.1 mm | 5 | |
| Sept. 25 |  Heavy rain at times | 22° /15° | 29 mm | 3 | |
| Sept. 26 | Heavy rain at times | 25° /18° | 23.2 mm | 6 | |
| Sept. 27 | Light rain shower | 16° /13° | 45.5 mm | 0.8 | |
| Sept. 28 | Light rain shower | 15° /13° | 13.5 mm | 0.3 | |
| Sept. 29 | Patchy rain possible | 19° /12° | 0.3 mm | 3.1 | |
| Sept. 30 | Overcast | 24° /16° | 0 mm | 5.5 | |
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Important Notice
Our weather forecast for Morris 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 Morris County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Morris County in September - FAQ
What are the expected maximum and minimum temperatures in Morris County during September?
During September, expect a variety of temperatures with highs around 23° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Morris County during September?
Significant rainfall exceeding 204.4 mm is expected in Morris 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 Morris County during September?
The average wind speed in Morris County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Morris County
Explore the daily rainfall trends and prepare for Morris Countys September weather 💧
Typically, Morris County has 12 rainy days in September with a total of 204.4 mm of rainfall.
UV exposure in Morris County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Morris County?Get accurate weather forecasts for Morris County, located at latitude 40.858 and longitude -74.426. Stay updated with localized weather information tailored for Morris County.
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