Niagara County (Niagara Falls)
September
Weather in Niagara County for September 2025
Your guide to Niagara County weather in September - trends and predictions
In general, the average temperature in Niagara County at the beginning of September is 26 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.6 °F by the end of September.
With an average of 5 rainy days, Niagara County experiences minimal rainfall in September.
- New! Chat with our AI weatherman - it’s amazing and free.
25
Dry days
5
Rainy days
0
Snow days
24°/13°
Temperatures
16 km/h
Avg max wind
70 %
Avg humidity
Niagara County in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2 22° | 3  26° | 4  28° | 5  30° | 6  30° | 7  22° |
| 8 22° | 9  22° | 10 21° | 11 25° | 12 26° | 13 22° | 14 24° |
| 15 24° | 16 24° | 17 23° | 18 22° | 19 22° | 20 24° | 21 27° |
| 22 25° | 23 21° | 24 22° | 25 23° | 26 22° | 27 20° | 28 20° |
| 29 22° | 30 22° |
You can click on date
Access Niagara County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Niagara 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 | Mist | 24° /14° | 0.4 mm | 5 | |
| Sept. 2 | Mist | 22° /14° | 0.1 mm | 5 | |
| Sept. 3 | Cloudy | 26° /15° | 0 mm | 6 | |
| Sept. 4 | Partly cloudy | 28° /17° | 0 mm | 7 | |
| Sept. 5 | Sunny | 30° /17° | 0 mm | 8 | |
| Sept. 6 | Thundery outbreaks possible | 30° /19° | 1 mm | 7 | |
| Sept. 7 | Light rain shower | 22° /15° | 6 mm | 5 | |
| Sept. 8 | Fog | 22° /12° | 0.1 mm | 5 | |
| Sept. 9 | Overcast | 22° /13° | 0.5 mm | 5 | |
| Sept. 10 | Light rain shower | 21° /15° | 3.7 mm | 5 | |
| Sept. 11 | Cloudy | 25° /15° | 0 mm | 6 | |
| Sept. 12 | Mist | 26° /16° | 0 mm | 6 | |
| Sept. 13 | Overcast | 22° /14° | 0 mm | 6 | |
| Sept. 14 | Partly cloudy | 24° /13° | 0 mm | 7 | |
| Sept. 15 | Mist | 24° /13° | 0 mm | 6 | |
| Sept. 16 | Mist | 24° /13° | 0 mm | 6 | |
| Sept. 17 | Mist | 23° /13° | 0 mm | 5 | |
| Sept. 18 | Patchy rain possible | 22° /13° | 0.3 mm | 5 | |
| Sept. 19 | Fog | 22° /12° | 0 mm | 5 | |
| Sept. 20 | Mist | 24° /12° | 0 mm | 6 | |
| Sept. 21 | Mist | 27° /15° | 2.6 mm | 6 | |
| Sept. 22 | Partly cloudy | 25° /13° | 0 mm | 6 | |
| Sept. 23 | Overcast | 21° /14° | 3.5 mm | 5 | |
| Sept. 24 | Mist | 22° /12° | 1.2 mm | 5 | |
| Sept. 25 | Cloudy | 23° /15° | 0 mm | 5 | |
| Sept. 26 | Mist | 22° /14° | 0 mm | 5 | |
| Sept. 27 | Overcast | 20° /12° | 0 mm | 5 | |
| Sept. 28 | Patchy rain possible | 20° /12° | 1.8 mm | 5 | |
| Sept. 29 | Patchy rain possible | 22° /16° | 0 mm | 5 | |
| Sept. 30 | Mist | 22° /14° | 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.
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 24° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Niagara County during September?
Expect minimal rainfall in Niagara County during September, with a total of 19.5 mm over approximately 5 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Niagara County during September?
The average wind speed in Niagara County during September is 16 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 ☀️
Top locations in Niagara County
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Niagara County?Get accurate weather forecasts for Niagara County, located at latitude 43.095 and longitude -79.057. Stay updated with localized weather information tailored for Niagara County.
Found a mistake?
We appreciate your attention to details. Tell us here.