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 New York in 2025/2026.

  • 21°C maximum daytime temperature in September in Niagara Falls21
    21°C max day temperature
  • 6 hours of sunshine per day
  • 10 days with some rainfall in September in Niagara Falls10
    10 days with some rainfall
  • 12°C minimum night-time temperature in September in Niagara Falls12
    12°C min night temperature
  • 12 hours of daylight per day in September in Niagara Falls12
    12 hours of daylight per day
  • No heat & humidity in September in Niagara Falls0
    No heat & humidity
  • 96 mm monthly rainfall in September in Niagara Falls96
    96 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Niagara Falls6
    6 (High) UV index

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The September weather guide for New York (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)

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More about New York

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 18:50
Monday, 15th September 2025 05:56 18:25
Tuesday, 30th September 2025 06:13 17:58

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