Niagara County (Niagara Falls)
September
Weather in Niagara County, New York for September 2025
Your guide to Niagara County weather in September - trends and predictions
Until now, September 2025 in Niagara County is slightly cooler than the historical average by -1.3 °F.
The forecast for the next days in Niagara County predicts temperatures to be around 24 °F, close to the historical average.
In general, the average temperature in Niagara County at the beginning of September is 24.7 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 22.3 °F by the end of September.
Niagara County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 21.2 mm.
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Temperatures
Rain 🌧️
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23
Dry days
7
Rainy days
0
Snow days
23°/14°
Temperatures
15 km/h
Avg max wind
71 %
Avg humidity
Niagara County Weather September
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Temperatures trend during September in Niagara County
See the weather trend as well as the moving average line
September weather in Niagara County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Mist | 24° /13° | 0.3 mm | 5 | |
| Sept. 2 | Mist | 22° /14° | 0.1 mm | 5 | |
| Sept. 3 |  Cloudy | 26° /14° | 0 mm | 6 | |
| Sept. 4 |  Partly cloudy | 26° /16° | 2 mm | 6 | |
| Sept. 5 |  Sunny | 28° /15° | 0 mm | 7 | |
| Sept. 6 |  Thundery outbreaks possible | 26° /17° | 0.7 mm | 6 | |
| Sept. 7 |  Light rain shower | 21° /14° | 5.4 mm | 5 | |
| Sept. 8 | Fog | 21° /11° | 0 mm | 5 | |
| Sept. 9 |  Overcast | 23° /12° | 0.3 mm | 5 | |
| Sept. 10 | Light rain shower | 22° /14° | 2.5 mm | 5 | |
| Sept. 11 | Cloudy | 24° /14° | 0 mm | 6 | |
| Sept. 12 | Mist | 25° /14° | 0 mm | 6 | |
| Sept. 13 | Overcast | 23° /13° | 0 mm | 6 | |
| Sept. 14 | Partly cloudy | 25° /13° | 0 mm | 6 | |
| Sept. 15 | Mist | 25° /12° | 0 mm | 6 | |
| Sept. 16 | Mist | 24° /12° | 0 mm | 6 | |
| Sept. 17 | Partly cloudy | 27° /11° | 0 mm | 1.3 | |
| Sept. 18 | Cloudy | 30° /12° | 0 mm | 1.3 | |
| Sept. 19 | Overcast | 19° /12° | 0 mm | 1.2 | |
| Sept. 20 | Sunny | 23° /8° | 0 mm | 1.3 | |
| Sept. 21 | Patchy rain possible | 27° /14° | 1.9 mm | 1.2 | |
| Sept. 22 | Patchy rain possible | 27° /18° | 0.8 mm | 0 | |
| Sept. 23 | Sunny | 29° /21° | 0 mm | 6 | |
| Sept. 24 | Sunny | 28° /20° | 0 mm | 6 | |
| Sept. 25 | Patchy rain possible | 22° /18° | 1.5 mm | 4 | |
| Sept. 26 | Patchy rain possible | 20° /17° | 2.1 mm | 4 | |
| Sept. 27 | Cloudy | 21° /15° | 0.1 mm | 4 | |
| Sept. 28 | Patchy rain possible | 20° /16° | 0.1 mm | 4 | |
| Sept. 29 | Partly cloudy | 22° /15° | 0 mm | 5 | |
| Sept. 30 | Sunny | 23° /15° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Niagara 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 Niagara County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Niagara County in September - FAQ
What are the expected maximum and minimum temperatures in Niagara County during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Niagara County during September?
In September, Niagara County can expect light to moderate rainfall, totaling 21.2 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Niagara County during September?
The average wind speed in Niagara County during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Niagara County
Explore the daily rainfall trends and prepare for Niagara Countys September weather 💧
UV exposure in Niagara County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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