St John's weather in May 2025

Expect 10°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in St John's in May based on long-term weather averages. There is usually 16 days with some rainfall and 102 mm of average monthly rainfall in May.

  • 10°C maximum daytime temperature in May in St John's10
    10°C max day temperature
  • 5 hours of sunshine per day
  • 16 days with some rainfall in May in St John's16
    16 days with some rainfall
  • 2°C minimum night-time temperature in May in St John's2
    2°C min night temperature
  • 15 hours of daylight per day in May in St John's15
    15 hours of daylight per day
  • No heat & humidity in May in St John's0
    No heat & humidity
  • 102 mm monthly rainfall in May in St John's102
    102 mm of monthly rainfall
  • UV (maximum) index 6 (High) in May in St John's6
    6 (High) UV index
  • 2°C sea temperature in May in St John's2
    2°C sea temperature

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The May weather guide for Newfoundland & Labrador (St John's) 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 St John's in May?

Daytime temperatures usually reach 10°C in St John's in May, falling to 2°C at night.

How sunny is it in St John's in May?

There are normally 5 hours of bright sunshine each day in St John's in May - that's 34% of daylight hours.

Is the sea cold around St John's in May?

The average sea temperature around St John's in May is 2°C.

Does it rain in St John's in May?

There are usually 16 days with some rain in St John's in May and the average monthly rainfall is 102mm.

St John's May sunrise & sunset times

Browse the sunrise and sunset times for St John's in May 2025. Select a month to view St John's sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:44 19:13
Friday, 16th May 2025 04:22 19:33
Saturday, 31st May 2025 04:08 19:50

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