Niagara Falls weather in May 2025

Expect 19°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Niagara Falls in May. Check more long-term weather averages for Niagara Falls in May before you book your next holiday to Ontario in 2025/2026.

  • 19°C maximum daytime temperature in May in Niagara Falls19
    19°C max day temperature
  • 8 hours of sunshine per day
  • 12 days with some rainfall in May in Niagara Falls12
    12 days with some rainfall
  • 8°C minimum night-time temperature in May in Niagara Falls8
    8°C min night temperature
  • 15 hours of daylight per day in May in Niagara Falls15
    15 hours of daylight per day
  • No heat & humidity in May in Niagara Falls0
    No heat & humidity
  • 75 mm monthly rainfall in May in Niagara Falls75
    75 mm of monthly rainfall
  • UV (maximum) index 7 (High) in May in Niagara Falls7
    7 (High) UV index

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The May 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)

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More about Canada

How hot is it in Niagara Falls in May?

Daytime temperatures usually reach 19°C in Niagara Falls in May, falling to 8°C at night.

How sunny is it in Niagara Falls in May?

There are normally 8 hours of bright sunshine each day in Niagara Falls in May - that's 52% of daylight hours.

Does it rain in Niagara Falls in May?

There are usually 12 days with some rain in Niagara Falls in May and the average monthly rainfall is 75mm.

Niagara Falls May sunrise & sunset times

Browse the sunrise and sunset times for Niagara Falls in May 2025. Select a month to view Niagara Falls sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:10 19:18
Friday, 16th May 2025 04:52 19:35
Saturday, 31st May 2025 04:40 19:49

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