Sundsvall weather in September 2025

Expect 13°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Sundsvall in September. Check more long-term weather averages for Sundsvall in September before you book your next holiday to Sweden in 2025/2026.

  • 13°C maximum daytime temperature in September in Sundsvall13
    13°C max day temperature
  • 4 hours of sunshine per day
  • 15 days with some rainfall in September in Sundsvall15
    15 days with some rainfall
  • 5°C minimum night-time temperature in September in Sundsvall5
    5°C min night temperature
  • 13 hours of daylight per day in September in Sundsvall13
    13 hours of daylight per day
  • No heat & humidity in September in Sundsvall0
    No heat & humidity
  • 76 mm monthly rainfall in September in Sundsvall76
    76 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in September in Sundsvall2
    2 (Low) UV index
  • 12°C sea temperature in September in Sundsvall12
    12°C sea temperature

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The September weather guide for Sweden (Sundsvall) 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 warm is it in Sundsvall in September?

Daytime temperatures usually reach 13°C in Sundsvall in September, falling to 5°C at night.

How sunny is it in Sundsvall in September?

There are normally 4 hours of bright sunshine each day in Sundsvall in September - that's 31% of daylight hours.

How warm is the sea around Sundsvall in September?

The average sea temperature around Sundsvall in September is 12°C.

Does it rain in Sundsvall in September?

There are usually 15 days with some rain in Sundsvall in September and the average monthly rainfall is 76mm.

Sundsvall September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 04:39 19:00
Monday, 15th September 2025 05:16 18:14
Tuesday, 30th September 2025 05:56 17:24

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