easeweather.com
Units
°C
°F
Westchester County
Forecast Today Tomorrow
more
New York United States

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.

  • The climate of Westchester County in September is notably wet, with an average of 15 rainy days.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
15
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
25°/16°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
70 %
Avg humidity

Westchester County in September average weather

Move between months or click on a day
Select a date

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.
Got it

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
Sunny
27° /18° 1.8 mm 7
Sept. 2 Partly cloudy
Partly cloudy
28° /17° 0 mm 7
Sept. 3 Partly cloudy
Partly cloudy
29° /16° 0 mm 7
Sept. 4 Partly cloudy
Partly cloudy
30° /19° 0 mm 8
Sept. 5 Partly cloudy
Partly cloudy
30° /20° 0.2 mm 8
Sept. 6 Partly cloudy
Partly cloudy
29° /20° 0 mm 7
Sept. 7 Thundery outbreaks possible
Thundery outbreaks possible
28° /19° 3.6 mm 7
Sept. 8 Thundery outbreaks possible
Thundery outbreaks possible
26° /17° 1.5 mm 7
Sept. 9 Patchy light rain with thunder
Patchy light rain with thunder
28° /17° 4.2 mm 7
Sept. 10 Light rain shower
Light rain shower
27° /19° 2.7 mm 7
Sept. 11 Light rain shower
Light rain shower
28° /17° 2.5 mm 7
Sept. 12 Mist
Mist
28° /17° 0 mm 7
Sept. 13 Moderate or heavy rain shower
Moderate or heavy rain shower
26° /17° 13.4 mm 6
Sept. 14 Cloudy
Cloudy
26° /17° 0.8 mm 6
Sept. 15 Overcast
Overcast
24° /16° 0 mm 6
Sept. 16 Overcast
Overcast
24° /15° 0 mm 5
Sept. 17 Light drizzle
Light drizzle
24° /15° 0.8 mm 6
Sept. 18 Light rain shower
Light rain shower
21° /16° 14.1 mm 5
Sept. 19 Sunny
Sunny
24° /16° 0 mm 6
Sept. 20 Sunny
Sunny
23° /15° 3.4 mm 6
Sept. 21 Partly cloudy
Partly cloudy
24° /14° 0 mm 6
Sept. 22 Patchy rain possible
Patchy rain possible
21° /13° 0 mm 6
Sept. 23 Heavy rain
Heavy rain
18° /13° 24.7 mm 4
Sept. 24 Light rain shower
Light rain shower
19° /13° 2.6 mm 5
Sept. 25 Moderate rain
Moderate rain
17° /14° 39.7 mm 4
Sept. 26 Patchy rain possible
Patchy rain possible
21° /14° 16.6 mm 5
Sept. 27 Overcast
Overcast
21° /13° 6.7 mm 5
Sept. 28 Overcast
Overcast
20° /14° 0 mm 5
Sept. 29 Moderate or heavy rain shower
Moderate or heavy rain shower
17° /15° 20.8 mm 4
Sept. 30 Light drizzle
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 25° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Westchester County during September?
Significant rainfall exceeding 242.9 mm is expected in Westchester County during September, occurring over more than 15 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

Location coordinates 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.