Sudbury weather in September 2025

Expect daytime maximum temperatures of 18°C in Sudbury, Ontario in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 12 days with some rainfall and typically 97 mm of rainfall in the month.

  • 18°C maximum daytime temperature in September in Sudbury18
    18°C max day temperature
  • 5 hours of sunshine per day
  • 12 days with some rainfall in September in Sudbury12
    12 days with some rainfall
  • 8°C minimum night-time temperature in September in Sudbury8
    8°C min night temperature
  • 13 hours of daylight per day in September in Sudbury13
    13 hours of daylight per day
  • No heat & humidity in September in Sudbury0
    No heat & humidity
  • 97 mm monthly rainfall in September in Sudbury97
    97 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Sudbury5
    5 (Moderate) UV index

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The September weather guide for Ontario (Sudbury) 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 Ontario

How hot is it in Sudbury in September?

Daytime temperatures usually reach 18°C in Sudbury in September, falling to 8°C at night.

How sunny is it in Sudbury in September?

There are normally 5 hours of bright sunshine each day in Sudbury in September - that's 38% of daylight hours.

Does it rain in Sudbury in September?

There are usually 12 days with some rain in Sudbury in September and the average monthly rainfall is 97mm.

Sudbury September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:45 19:02
Monday, 15th September 2025 06:02 18:35
Tuesday, 30th September 2025 06:22 18:05

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