Summerside weather in September 2025

Expect 18°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Summerside in September. Check more long-term weather averages for Summerside in September before you book your next holiday to Prince Edward Island in 2025/2026.

  • 18°C maximum daytime temperature in September in Summerside18
    18°C max day temperature
  • 6 hours of sunshine per day
  • 12 days with some rainfall in September in Summerside12
    12 days with some rainfall
  • 10°C minimum night-time temperature in September in Summerside10
    10°C min night temperature
  • 13 hours of daylight per day in September in Summerside13
    13 hours of daylight per day
  • No heat & humidity in September in Summerside0
    No heat & humidity
  • 81 mm monthly rainfall in September in Summerside81
    81 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Summerside5
    5 (Moderate) UV index
  • 16°C sea temperature in September in Summerside16
    16°C sea temperature

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The September weather guide for Prince Edward Island (Summerside) 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 Summerside in September?

Daytime temperatures usually reach 18°C in Summerside in September, falling to 10°C at night.

How sunny is it in Summerside in September?

There are normally 6 hours of bright sunshine each day in Summerside in September - that's 44% of daylight hours.

How warm is the sea around Summerside in September?

The average sea temperature around Summerside in September is 16°C.

Does it rain in Summerside in September?

There are usually 12 days with some rain in Summerside in September and the average monthly rainfall is 81mm.

What is the chance of a hurricane in Summerside in September?

On average less than 1 day in September in Summerside is likely to be affected by the passage of one or more tropical storms.

Summerside September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:36 18:53
Monday, 15th September 2025 05:53 18:26
Tuesday, 30th September 2025 06:13 17:56

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