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Weather in Niagara Falls, New York for September 2025

Your guide to Niagara Falls weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Niagara Falls is slightly cooler than the historical average by -1.8 °F.

  • Expect cooler weather in the next days in Niagara Falls with the forecast suggesting a temperature of 21.8 °F, lower than the historical average.

  • In general, the average temperature in Niagara Falls at the beginning of September is 24.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.6 °F by the end of September.

    • Rain 🌧️

  • Niagara Falls experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 21.2 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/14°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Niagara Falls Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
24°
2
Mist
22°
3
Cloudy
26°
4
Partly cloudy
26°
5
Sunny
28°
6
Thundery outbreaks possible
26°
7
Light rain shower
21°
8
Fog
21°
9
Overcast
23°
10
Light rain shower
22°
11
Cloudy
24°
12
Mist
25°
13
Overcast
23°
14
Partly cloudy
26°
15
Mist
25°
16
Partly cloudy
25°
17
Partly cloudy
26°
18
Sunny
28°
19
Sunny
20°
20
Sunny
22°
21
Sunny
24°
22
Patchy rain possible
22°
23
Patchy rain possible
21°
24
Patchy rain possible
22°
25
Patchy rain possible
18°
26
Sunny
13°
27
Sunny
13°
28
Patchy rain possible
20°
29
Patchy rain possible
22°
30
Mist
22°

Temperatures trend during September in Niagara Falls

See the weather trend as well as the moving average line

September weather in Niagara Falls day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Mist
Mist
 24° /13° 0.3 mm 5
Sept. 2 Mist
Mist
 22° /14° 0.1 mm 5
Sept. 3 Cloudy
Cloudy
 26° /14° 0 mm 6
Sept. 4 Partly cloudy
Partly cloudy
 26° /16° 2 mm 6
Sept. 5 Sunny
Sunny
 28° /15° 0 mm 7
Sept. 6 Thundery outbreaks possible
Thundery outbreaks possible
 26° /17° 0.7 mm 6
Sept. 7 Light rain shower
Light rain shower
 21° /14° 5.4 mm 5
Sept. 8 Fog
Fog
 21° /11° 0 mm 5
Sept. 9 Overcast
Overcast
 23° /12° 0.3 mm 5
Sept. 10 Light rain shower
Light rain shower
 22° /14° 2.5 mm 5
Sept. 11 Cloudy
Cloudy
 24° /14° 0 mm 6
Sept. 12 Mist
Mist
 25° /14° 0 mm 6
Sept. 13 Overcast
Overcast
 23° /13° 0 mm 6
Sept. 14 Partly cloudy
Partly cloudy
 26° /14° 0 mm 1.3
Sept. 15 Mist
Mist
 25° /12° 0 mm 1.4
Sept. 16 Partly cloudy
Partly cloudy
 25° /12° 0 mm 1.3
Sept. 17 Partly cloudy
Partly cloudy
 26° /13° 0 mm 1.3
Sept. 18 Sunny
Sunny
 28° /17° 0 mm 0
Sept. 19 Sunny
Sunny
 20° /14° 0 mm 5
Sept. 20 Sunny
Sunny
 22° /10° 0 mm 4
Sept. 21 Sunny
Sunny
 24° /13° 0 mm 5
Sept. 22 Patchy rain possible
Patchy rain possible
 22° /16° 1.5 mm 4
Sept. 23 Patchy rain possible
Patchy rain possible
 21° /17° 3.4 mm 4
Sept. 24 Patchy rain possible
Patchy rain possible
 22° /17° 2 mm 4
Sept. 25 Patchy rain possible
Patchy rain possible
 18° /15° 4.8 mm 4
Sept. 26 Sunny
Sunny
 13° /10° 0 mm 4
Sept. 27 Sunny
Sunny
 13° /8° 0 mm 4
Sept. 28 Patchy rain possible
Patchy rain possible
 20° /12° 1.8 mm 5
Sept. 29 Patchy rain possible
Patchy rain possible
 22° /16° 0 mm 5
Sept. 30 Mist
Mist
 22° /14° 0 mm 5
Next
Important Notice
Our weather forecast for Niagara Falls 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 Falls forecast closer to your planned date for the most up-to-date weather information.
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Niagara Falls in September - FAQ

What are the expected maximum and minimum temperatures in Niagara Falls 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 Falls during September?
In September, Niagara Falls 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 Falls during September?
The average wind speed in Niagara Falls during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Niagara Falls

Explore the daily rainfall trends and prepare for Niagara Fallss September weather 💧

UV exposure in Niagara Falls during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Niagara Falls?

Get accurate weather forecasts for Niagara Falls, located at latitude 43.095 and longitude -79.057. Stay updated with localized weather information tailored for Niagara Falls.

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