Alta weather in September 2025

Expect daytime maximum temperatures of 50°F in Alta, Norway in September based on long-term weather averages. There are 3 hours of sunshine per day on average with 18 days with some rainfall and typically 2.3 inches of rainfall in the month.

  • 50°F maximum daytime temperature in September in Alta50
    50°F max day temperature
  • 3 hours of sunshine per day
  • 18 days with some rainfall in September in Alta18
    18 days with some rainfall
  • 37°F minimum night-time temperature in September in Alta37
    37°F min night temperature
  • 13 hours of daylight per day in September in Alta13
    13 hours of daylight per day
  • No heat & humidity in September in Alta0
    No heat & humidity
  • 2.3 inches monthly rainfall in September in Alta2.3
    2.3 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in September in Alta1
    1 (Low) UV index
  • 48°F sea temperature in September in Alta48
    48°F sea temperature

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The September weather guide for Norway (Alta) 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)  |  Imperial (°F)

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More about Norway

How warm is it in Alta in September?

Daytime temperatures usually reach 50°F in Alta in September, falling to 37°F at night.

How sunny is it in Alta in September?

There are normally 3 hours of bright sunshine each day in Alta in September - that's 25% of daylight hours.

How warm is the sea around Alta in September?

The average sea temperature around Alta in September is 48°F.

Does it rain in Alta in September?

There are usually 18 days with some rain in Alta in September and the average monthly rainfall is 2.3 inches.

Alta September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 03:43 19:08
Monday, 15th September 2025 04:40 18:02
Tuesday, 30th September 2025 05:39 16:53

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