Westchester County (Yonkers)
September
Weather in Westchester County for September 2025
Your guide to Westchester County weather in September - trends and predictions
In general, the average temperature in Westchester County at the beginning of September is 28.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.3 °F by the end of September.
Westchester County in September brings notable rainfall, with an average of 16 rainy days and a total precipitation of 166.9 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
14
Dry days
16
Rainy days
0
Snow days
24°/16°
Temperatures
16 km/h
Avg max wind
67 %
Avg humidity
Westchester County in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2  28° | 3 29° | 4 30° | 5 30° | 6 29° | 7  28° |
| 8 26° | 9  28° | 10  27° | 11 28° | 12  28° | 13  26° | 14  26° |
| 15  24° | 16 24° | 17  24° | 18 21° | 19 24° | 20 23° | 21 24° |
| 22 21° | 23  18° | 24 19° | 25  17° | 26 21° | 27 21° | 28 20° |
| 29 17° | 30 20° |
You can click on date
Access Westchester County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Westchester 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° /18° | 1.8 mm | 7 | |
| Sept. 2 | Partly cloudy | 28° /17° | 0 mm | 7 | |
| Sept. 3 | Partly cloudy | 29° /16° | 0 mm | 7 | |
| Sept. 4 | Partly cloudy | 30° /19° | 0 mm | 8 | |
| Sept. 5 | Partly cloudy | 30° /20° | 0.2 mm | 8 | |
| Sept. 6 | Partly cloudy | 29° /20° | 0 mm | 7 | |
| Sept. 7 | Thundery outbreaks possible | 28° /19° | 3.6 mm | 7 | |
| Sept. 8 | Thundery outbreaks possible | 26° /17° | 1.5 mm | 7 | |
| Sept. 9 | Patchy light rain with thunder | 28° /17° | 4.2 mm | 7 | |
| Sept. 10 | Light rain shower | 27° /19° | 2.7 mm | 7 | |
| Sept. 11 | Light rain shower | 28° /17° | 2.5 mm | 7 | |
| Sept. 12 | Mist | 28° /17° | 0 mm | 7 | |
| Sept. 13 | Moderate or heavy rain shower | 26° /17° | 13.4 mm | 6 | |
| Sept. 14 | Cloudy | 26° /17° | 0.8 mm | 6 | |
| Sept. 15 | Overcast | 24° /16° | 0 mm | 6 | |
| Sept. 16 | Overcast | 24° /15° | 0 mm | 5 | |
| Sept. 17 | Light drizzle | 24° /15° | 0.8 mm | 6 | |
| Sept. 18 | Light rain shower | 21° /16° | 14.1 mm | 5 | |
| Sept. 19 | Sunny | 24° /16° | 0 mm | 6 | |
| Sept. 20 | Sunny | 23° /15° | 3.4 mm | 6 | |
| Sept. 21 | Partly cloudy | 24° /14° | 0 mm | 6 | |
| Sept. 22 | Patchy rain possible | 21° /13° | 0 mm | 6 | |
| Sept. 23 | Heavy rain | 18° /13° | 24.7 mm | 4 | |
| Sept. 24 | Light rain shower | 19° /13° | 2.6 mm | 5 | |
| Sept. 25 | Moderate rain | 17° /14° | 39.7 mm | 4 | |
| Sept. 26 | Patchy rain possible | 21° /14° | 16.6 mm | 5 | |
| Sept. 27 | Overcast | 21° /13° | 6.7 mm | 5 | |
| Sept. 28 | Overcast | 20° /14° | 0 mm | 5 | |
| Sept. 29 | Moderate or heavy rain shower | 17° /15° | 20.8 mm | 4 | |
| Sept. 30 | Light drizzle | 20° /14° | 6.8 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Westchester 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 Westchester County forecast closer to your planned date for the most up-to-date weather information.
Westchester County in September - FAQ
What are the expected maximum and minimum temperatures in Westchester County during September?
During September, expect a variety of temperatures with highs around 24° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Westchester County during September?
Significant rainfall exceeding 166.9 mm is expected in Westchester County during September, occurring over more than 16 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Westchester County during September?
The average wind speed in Westchester County during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Westchester County
Explore the daily rainfall trends and prepare for Westchester Countys September weather 💧
UV exposure in Westchester County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Westchester County
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Westchester County?Get accurate weather forecasts for Westchester County, located at latitude 40.931 and longitude -73.899. Stay updated with localized weather information tailored for Westchester County.
Found a mistake?
We appreciate your attention to details. Tell us here.