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Niagara Falls weather in September 2025
Expect 21°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Niagara Falls in September. Check more long-term weather averages for Niagara Falls in September before you book your next holiday to Ontario in 2025/2026.
- 2121°C max day temperature
- 6 hours of sunshine per day
- 1010 days with some rainfall
- 1212°C min night temperature
- 1212 hours of daylight per day
- 0No heat & humidity
- 9696 mm of monthly rainfall
- 66 (High) UV index
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Recommended for Ontario
The September weather guide for Ontario (Niagara Falls) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about Canada
How hot is it in Niagara Falls in September?
Daytime temperatures usually reach 21°C in Niagara Falls in September, falling to 12°C at night.
How sunny is it in Niagara Falls in September?
There are normally 6 hours of bright sunshine each day in Niagara Falls in September - that's 51% of daylight hours.
Does it rain in Niagara Falls in September?
There are usually 10 days with some rain in Niagara Falls in September and the average monthly rainfall is 96mm.
Niagara Falls September sunrise & sunset times
Browse the sunrise and sunset times for Niagara Falls in September 2025. Select a month to view Niagara Falls sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:41 | 18:51 |
Monday, 15th September 2025 | 05:56 | 18:26 |
Tuesday, 30th September 2025 | 06:13 | 17:59 |
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