Kingston weather in September 2025

Expect daytime maximum temperatures of 68°F in Kingston, Ontario in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 3.6 inches of rainfall in the month.

  • 68°F maximum daytime temperature in September in Kingston68
    68°F max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in September in Kingston11
    11 days with some rainfall
  • 52°F minimum night-time temperature in September in Kingston52
    52°F min night temperature
  • 12 hours of daylight per day in September in Kingston12
    12 hours of daylight per day
  • No heat & humidity in September in Kingston0
    No heat & humidity
  • 3.6 inches monthly rainfall in September in Kingston3.6
    3.6 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Kingston5
    5 (Moderate) UV index
  • 66°F sea temperature in September in Kingston66
    66°F sea temperature

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The September weather guide for Ontario (Kingston) 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)  |  Imperial (°F)

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More about Ontario

How hot is it in Kingston in September?

Daytime temperatures usually reach 68°F in Kingston in September, falling to 52°F at night.

How sunny is it in Kingston in September?

There are normally 6 hours of bright sunshine each day in Kingston in September - that's 46% of daylight hours.

How warm is the sea around Kingston in September?

The average sea temperature around Kingston in September is 66°F.

Does it rain in Kingston in September?

There are usually 11 days with some rain in Kingston in September and the average monthly rainfall is 3.6 inches.

Kingston September sunrise & sunset times

Browse the sunrise and sunset times for Kingston in September 2025. Select a month to view Kingston sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:29 18:42
Monday, 15th September 2025 05:45 18:16
Tuesday, 30th September 2025 06:03 17:48

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