Jan Mayen weather in September 2025

Expect 3°C daytime maximum temperatures in the shade with on average 2 hours of sunshine per day in Jan Mayen in September. Check more long-term weather averages for Jan Mayen in September before you book your next holiday to Jan Mayen in 2025/2026.

  • 3°C maximum daytime temperature in September in Jan Mayen3
    3°C max day temperature
  • 2 hours of sunshine per day
  • 19 days with some rainfall in September in Jan Mayen19
    19 days with some rainfall
  • -1°C minimum night-time temperature in September in Jan Mayen-1
    -1°C min night temperature
  • 13 hours of daylight per day in September in Jan Mayen13
    13 hours of daylight per day
  • No heat & humidity in September in Jan Mayen0
    No heat & humidity
  • 88 mm monthly rainfall in September in Jan Mayen88
    88 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in September in Jan Mayen1
    1 (Low) UV index
  • 5°C sea temperature in September in Jan Mayen5
    5°C sea temperature

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The September weather guide for Jan Mayen 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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How cold is it in Jan Mayen in September?

Daytime temperatures usually reach 3°C in Jan Mayen in September, falling to -1°C at night.

How sunny is it in Jan Mayen in September?

There are normally 2 hours of bright sunshine each day in Jan Mayen in September - that's 14% of daylight hours.

Is the sea cold around Jan Mayen in September?

The average sea temperature around Jan Mayen in September is 5°C.

Does it rain in Jan Mayen in September?

There are usually 19 days with some rain in Jan Mayen in September and the average monthly rainfall is 88mm. Rain may fall as snow in this month.

Jan Mayen September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:45 21:21
Monday, 15th September 2025 06:46 20:12
Tuesday, 30th September 2025 07:49 18:59

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