Stephenville weather in September 2025

Expect 15°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Stephenville in September. Check more long-term weather averages for Stephenville in September before you book your next holiday to Newfoundland & Labrador in 2025/2026.

  • 15°C maximum daytime temperature in September in Stephenville15
    15°C max day temperature
  • 4 hours of sunshine per day
  • 16 days with some rainfall in September in Stephenville16
    16 days with some rainfall
  • 7°C minimum night-time temperature in September in Stephenville7
    7°C min night temperature
  • 13 hours of daylight per day in September in Stephenville13
    13 hours of daylight per day
  • No heat & humidity in September in Stephenville0
    No heat & humidity
  • 113 mm monthly rainfall in September in Stephenville113
    113 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Stephenville4
    4 (Moderate) UV index
  • 14°C sea temperature in September in Stephenville14
    14°C sea temperature

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The September weather guide for Newfoundland & Labrador (Stephenville) 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 warm is it in Stephenville in September?

Daytime temperatures usually reach 15°C in Stephenville in September, falling to 7°C at night.

How sunny is it in Stephenville in September?

There are normally 4 hours of bright sunshine each day in Stephenville in September - that's 35% of daylight hours.

How warm is the sea around Stephenville in September?

The average sea temperature around Stephenville in September is 14°C.

Does it rain in Stephenville in September?

There are usually 16 days with some rain in Stephenville in September and the average monthly rainfall is 113mm.

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

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

Stephenville September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:42 19:06
Monday, 15th September 2025 06:01 18:36
Tuesday, 30th September 2025 06:23 18:05

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