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 27.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21 °F by the end of September.
United States experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 150 mm.
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Temperatures
Rain 🌧️
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8
Dry days
22
Rainy days
0
Snow days
24°/17°
Temperatures
18 km/h
Avg max wind
62 %
Avg humidity
United States in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2  26° | 3  27° | 4 29° | 5  27° | 6  28° | 7 27° |
| 8  27° | 9 28° | 10 27° | 11 26° | 12 28° | 13 27° | 14 27° |
| 15 26° | 16 25° | 17 24° | 18 25° | 19 26° | 20 24° | 21 25° |
| 22 23° | 23 20° | 24 21° | 25 21° | 26 23° | 27 23° | 28 21° |
| 29 19° | 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° | 12.8 mm | 7 | |
| Sept. 2 | Moderate or heavy rain shower | 26° /16° | 7 mm | 6 | |
| Sept. 3 | Partly cloudy | 27° /17° | 0 mm | 7 | |
| Sept. 4 | Sunny | 29° /19° | 0.8 mm | 7 | |
| Sept. 5 | Patchy rain possible | 27° /20° | 1.1 mm | 7 | |
| Sept. 6 | Overcast | 28° /20° | 5.7 mm | 6 | |
| Sept. 7 | Partly cloudy | 27° /18° | 3 mm | 7 | |
| Sept. 8 | Cloudy | 27° /18° | 1.4 mm | 6 | |
| Sept. 9 | Moderate or heavy rain shower | 28° /18° | 6 mm | 6 | |
| Sept. 10 | Sunny | 27° /18° | 1.2 mm | 7 | |
| Sept. 11 | Sunny | 26° /18° | 4.2 mm | 6 | |
| Sept. 12 | Sunny | 28° /18° | 1.5 mm | 7 | |
| Sept. 13 | Moderate or heavy rain shower | 27° /19° | 14.8 mm | 7 | |
| Sept. 14 | Overcast | 27° /18° | 0 mm | 6 | |
| Sept. 15 | Cloudy | 26° /17° | 0.3 mm | 6 | |
| Sept. 16 | Patchy rain possible | 25° /16° | 0.3 mm | 6 | |
| Sept. 17 | Patchy rain possible | 24° /17° | 0.4 mm | 6 | |
| Sept. 18 | Patchy rain possible | 25° /18° | 7.2 mm | 6 | |
| Sept. 19 | Sunny | 26° /17° | 3.7 mm | 6 | |
| Sept. 20 | Sunny | 24° /17° | 0.8 mm | 6 | |
| Sept. 21 | Overcast | 25° /15° | 0 mm | 6 | |
| Sept. 22 | Patchy rain possible | 23° /15° | 3.2 mm | 6 | |
| Sept. 23 | Moderate or heavy rain shower | 20° /14° | 15.7 mm | 5 | |
| Sept. 24 | Moderate or heavy rain shower | 21° /13° | 6.3 mm | 5 | |
| Sept. 25 | Partly cloudy | 21° /14° | 18.5 mm | 5 | |
| Sept. 26 | Overcast | 23° /15° | 12 mm | 5 | |
| Sept. 27 | Overcast | 23° /14° | 4.2 mm | 5 | |
| Sept. 28 | Overcast | 21° /14° | 1 mm | 5 | |
| Sept. 29 | Partly cloudy | 19° /13° | 12.1 mm | 5 | |
| Sept. 30 | Cloudy | 19° /13° | 4.7 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 24° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in United States during September?
Significant rainfall exceeding 150 mm is expected in United States during September, occurring over more than 22 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 18 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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