Richmond County (Staten Island)
September
Weather in Richmond County for September 2025
Your guide to Richmond County weather in September - trends and predictions
In general, the average temperature in Richmond County at the beginning of September is 28.6 °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 Richmond County 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°/16°
Temperatures
17 km/h
Avg max wind
71 %
Avg humidity
Richmond County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2  27° | 3 28° | 4 30° | 5 30° | 6 29° | 7  29° |
| 8  26° | 9 28° | 10  27° | 11 27° | 12  26° | 13  26° | 14  25° |
| 15 23° | 16 24° | 17  23° | 18 22° | 19 23° | 20 22° | 21 24° |
| 22 22° | 23  19° | 24  19° | 25 18° | 26 22° | 27 20° | 28 20° |
| 29  17° | 30 19° |
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Temperatures trend during September in Richmond County
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 mm | 7 | |
| Sept. 2 | Partly cloudy | 27° /16° | 0 mm | 7 | |
| Sept. 3 | Sunny | 28° /17° | 0 mm | 7 | |
| Sept. 4 | Partly cloudy | 30° /19° | 0 mm | 8 | |
| Sept. 5 | Partly cloudy | 30° /20° | 0 mm | 8 | |
| Sept. 6 | Partly cloudy | 29° /21° | 0.1 mm | 7 | |
| Sept. 7 | Thundery outbreaks possible | 29° /20° | 4.6 mm | 7 | |
| Sept. 8 | Patchy light rain with thunder | 26° /18° | 2.3 mm | 7 | |
| Sept. 9 | Patchy light rain with thunder | 28° /17° | 2.4 mm | 7 | |
| Sept. 10 | Light rain shower | 27° /19° | 1 mm | 7 | |
| Sept. 11 | Light rain shower | 27° /17° | 3 mm | 6 | |
| Sept. 12 | Overcast | 26° /18° | 0 mm | 6 | |
| Sept. 13 | Moderate or heavy rain shower | 26° /17° | 8.8 mm | 7 | |
| Sept. 14 | Cloudy | 25° /17° | 0 mm | 6 | |
| Sept. 15 | Overcast | 23° /16° | 0 mm | 6 | |
| Sept. 16 | Overcast | 24° /16° | 0 mm | 5 | |
| Sept. 17 | Light rain | 23° /15° | 0.9 mm | 6 | |
| Sept. 18 | Light rain shower | 22° /17° | 11.8 mm | 5 | |
| Sept. 19 | Partly cloudy | 23° /16° | 11.8 mm | 6 | |
| Sept. 20 | Sunny | 22° /15° | 0 mm | 6 | |
| Sept. 21 | Partly cloudy | 24° /15° | 0 mm | 6 | |
| Sept. 22 | Patchy rain possible | 22° /13° | 0 mm | 5 | |
| Sept. 23 | Heavy rain | 19° /14° | 19.7 mm | 5 | |
| Sept. 24 | Moderate rain | 19° /14° | 5.6 mm | 5 | |
| Sept. 25 | Light rain shower | 18° /15° | 22.5 mm | 4 | |
| Sept. 26 | Patchy rain possible | 22° /15° | 18.2 mm | 5 | |
| Sept. 27 | Overcast | 20° /14° | 4.3 mm | 5 | |
| Sept. 28 | Patchy rain possible | 20° /15° | 2.4 mm | 5 | |
| Sept. 29 | Moderate or heavy rain with thunder | 17° /15° | 25.9 mm | 4 | |
| Sept. 30 | Light rain | 19° /15° | 9.3 mm | 4 | |
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Important Notice
Our weather forecast for Richmond 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 Richmond County forecast closer to your planned date for the most up-to-date weather information.
Richmond County in September - FAQ
What are the expected maximum and minimum temperatures in Richmond 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 Richmond County during September?
Significant rainfall exceeding 204.7 mm is expected in Richmond County during September, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Richmond County during September?
The average wind speed in Richmond County during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Richmond County
Explore the daily rainfall trends and prepare for Richmond Countys September weather 💧
UV exposure in Richmond County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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