Passaic County
September
Weather in Passaic County for September 2025
Your guide to Passaic County weather in September - trends and predictions
In general, the average temperature in Passaic County at the beginning of September is 28.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.9 °F by the end of September.
The climate of Passaic County in September is notably wet, with an average of 13 rainy days.
- New! Chat with our AI weatherman - it’s amazing and free.
17
Dry days
13
Rainy days
0
Snow days
25°/15°
Temperatures
15 km/h
Avg max wind
72 %
Avg humidity
Passaic County in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2  27° | 3 28° | 4  30° | 5 30° | 6 30° | 7 28° |
| 8  27° | 9  27° | 10 27° | 11 27° | 12  28° | 13  26° | 14  26° |
| 15  24° | 16 25° | 17  23° | 18 22° | 19 24° | 20 23° | 21 24° |
| 22 22° | 23  18° | 24 18° | 25  17° | 26 21° | 27 21° | 28 20° |
| 29  16° | 30 19° |
You can click on date
Access Passaic County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Passaic County
See the weather trend as well as the moving average line
September weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 27° /16° | 1.6 mm | 7 | |
| Sept. 2 | Partly cloudy | 27° /14° | 0 mm | 7 | |
| Sept. 3 | Partly cloudy | 28° /14° | 0 mm | 7 | |
| Sept. 4 | Thundery outbreaks possible | 30° /17° | 0 mm | 8 | |
| Sept. 5 | Partly cloudy | 30° /18° | 0.1 mm | 8 | |
| Sept. 6 | Partly cloudy | 30° /19° | 0 mm | 7 | |
| Sept. 7 | Thundery outbreaks possible | 28° /18° | 4.1 mm | 7 | |
| Sept. 8 | Light rain shower | 27° /16° | 3.6 mm | 7 | |
| Sept. 9 | Patchy light rain with thunder | 27° /16° | 5.8 mm | 7 | |
| Sept. 10 | Light rain shower | 27° /17° | 5.8 mm | 7 | |
| Sept. 11 | Light rain shower | 27° /15° | 3 mm | 7 | |
| Sept. 12 | Mist | 28° /16° | 0 mm | 7 | |
| Sept. 13 | Moderate or heavy rain shower | 26° /15° | 13.1 mm | 6 | |
| Sept. 14 | Cloudy | 26° /16° | 0 mm | 6 | |
| Sept. 15 | Overcast | 24° /14° | 0 mm | 6 | |
| Sept. 16 | Overcast | 25° /14° | 0 mm | 6 | |
| Sept. 17 | Light rain | 23° /14° | 1.5 mm | 6 | |
| Sept. 18 | Moderate or heavy rain shower | 22° /16° | 9.4 mm | 5 | |
| Sept. 19 | Partly cloudy | 24° /16° | 2.8 mm | 6 | |
| Sept. 20 | Sunny | 23° /14° | 1.7 mm | 6 | |
| Sept. 21 | Partly cloudy | 24° /13° | 0 mm | 6 | |
| Sept. 22 | Patchy rain possible | 22° /12° | 0 mm | 5 | |
| Sept. 23 | Heavy rain | 18° /13° | 20.2 mm | 4 | |
| Sept. 24 | Light rain shower | 18° /13° | 3.8 mm | 4 | |
| Sept. 25 | Moderate rain | 17° /14° | 42.6 mm | 4 | |
| Sept. 26 | Patchy rain possible | 21° /14° | 19 mm | 5 | |
| Sept. 27 | Cloudy | 21° /12° | 6.5 mm | 5 | |
| Sept. 28 | Mist | 20° /14° | 0 mm | 5 | |
| Sept. 29 | Moderate or heavy rain with thunder | 16° /13° | 27.8 mm | 4 | |
| Sept. 30 | Light rain | 19° /14° | 8.9 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Passaic 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 Passaic County forecast closer to your planned date for the most up-to-date weather information.
Passaic County in September - FAQ
What are the expected maximum and minimum temperatures in Passaic County during September?
During September, expect a variety of temperatures with highs around 25° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Passaic County during September?
Significant rainfall exceeding 259.7 mm is expected in Passaic County during September, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Passaic County during September?
The average wind speed in Passaic County during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Passaic County
Explore the daily rainfall trends and prepare for Passaic Countys September weather 💧
UV exposure in Passaic County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Passaic County
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Passaic County?Get accurate weather forecasts for Passaic County, located at latitude 40.917 and longitude -74.172. Stay updated with localized weather information tailored for Passaic County.
Found a mistake?
We appreciate your attention to details. Tell us here.