United States (New York City)
September
Weather in the United States for September 2025
Your guide to the United States weather in September - trends and predictions
In general, the average temperature in the United States at the beginning of September is 29 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.6 °F by the end of September.
The climate of United States in September is notably wet, with an average of 14 rainy days.
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16
Dry days
14
Rainy days
0
Snow days
25°/17°
Temperatures
19 km/h
Avg max wind
69 %
Avg humidity
United States in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2  28° | 3 29° | 4 30° | 5 30° | 6 30° | 7 29° |
| 8  26° | 9 28° | 10 27° | 11 28° | 12  27° | 13  26° | 14 26° |
| 15  24° | 16 25° | 17  23° | 18 21° | 19  24° | 20 23° | 21 25° |
| 22 22° | 23  19° | 24 19° | 25  18° | 26 22° | 27 21° | 28 21° |
| 29 17° | 30 19° |
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Temperatures trend during September in the United States
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 27° /18° | 2.7 mm | 7 | |
| Sept. 2 | Partly cloudy | 28° /17° | 0 mm | 7 | |
| Sept. 3 | Partly cloudy | 29° /17° | 0 mm | 7 | |
| Sept. 4 | Partly cloudy | 30° /20° | 0 mm | 8 | |
| Sept. 5 | Partly cloudy | 30° /21° | 0 mm | 8 | |
| Sept. 6 | Partly cloudy | 30° /22° | 0 mm | 7 | |
| Sept. 7 | Sunny | 29° /19° | 4.7 mm | 7 | |
| Sept. 8 | Light rain shower | 26° /17° | 2.1 mm | 7 | |
| Sept. 9 | Light rain shower | 28° /18° | 3.4 mm | 7 | |
| Sept. 10 | Light rain shower | 27° /20° | 2.5 mm | 7 | |
| Sept. 11 | Light rain shower | 28° /19° | 1.2 mm | 7 | |
| Sept. 12 | Cloudy | 27° /18° | 0 mm | 7 | |
| Sept. 13 | Moderate or heavy rain shower | 26° /17° | 18.2 mm | 6 | |
| Sept. 14 | Cloudy | 26° /18° | 0 mm | 6 | |
| Sept. 15 | Overcast | 24° /16° | 0 mm | 6 | |
| Sept. 16 | Overcast | 25° /16° | 0 mm | 6 | |
| Sept. 17 | Light drizzle | 23° /15° | 0.6 mm | 6 | |
| Sept. 18 | Light rain shower | 21° /17° | 14.1 mm | 5 | |
| Sept. 19 | Fog | 24° /16° | 7.3 mm | 6 | |
| Sept. 20 | Sunny | 23° /15° | 1.5 mm | 6 | |
| Sept. 21 | Partly cloudy | 25° /14° | 0 mm | 6 | |
| Sept. 22 | Mist | 22° /13° | 0 mm | 6 | |
| Sept. 23 | Heavy rain | 19° /14° | 23.1 mm | 5 | |
| Sept. 24 | Light rain | 19° /14° | 3.3 mm | 5 | |
| Sept. 25 | Moderate rain | 18° /15° | 35.7 mm | 4 | |
| Sept. 26 | Patchy rain possible | 22° /15° | 23.9 mm | 5 | |
| Sept. 27 | Overcast | 21° /14° | 8.4 mm | 5 | |
| Sept. 28 | Overcast | 21° /15° | 0 mm | 5 | |
| Sept. 29 | Moderate or heavy rain shower | 17° /15° | 24.3 mm | 4 | |
| Sept. 30 | Light drizzle | 19° /14° | 9 mm | 4 | |
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Important Notice
Our weather forecast for the United States 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 United States forecast closer to your planned date for the most up-to-date weather information.
United States in September - FAQ
What are the expected maximum and minimum temperatures in United States during September?
During September, expect a variety of temperatures with highs around 25° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in United States during September?
Significant rainfall exceeding 253.6 mm is expected in United States during September, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in United States during September?
The average wind speed in United States during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in the United States
Explore the daily rainfall trends and prepare for United Statess September weather 💧
UV exposure in United States during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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