Reykjavik weather in September 2025

Expect 9°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Reykjavik in September. Check more long-term weather averages for Reykjavik in September before you book your next holiday to Iceland in 2025/2026.

  • 9°C maximum daytime temperature in September in Reykjavik9
    9°C max day temperature
  • 4 hours of sunshine per day
  • 18 days with some rainfall in September in Reykjavik18
    18 days with some rainfall
  • 4°C minimum night-time temperature in September in Reykjavik4
    4°C min night temperature
  • 13 hours of daylight per day in September in Reykjavik13
    13 hours of daylight per day
  • No heat & humidity in September in Reykjavik0
    No heat & humidity
  • 86 mm monthly rainfall in September in Reykjavik86
    86 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in September in Reykjavik2
    2 (Low) UV index
  • 10°C sea temperature in September in Reykjavik10
    10°C sea temperature

More about Reykjavik

Reykjavik by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Iceland

TUI: up to 7% off holidays booked online

  • Book online with TUI & save up to 7% on holidays
  • FREE child places available for select holidays
  • Pay £0 deposits with direct debit & spread the cost
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

The September weather guide for Iceland (Reykjavik) 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)

Back to top

More about Iceland

How warm is it in Reykjavik in September?

Daytime temperatures usually reach 9°C in Reykjavik in September, falling to 4°C at night.

How sunny is it in Reykjavik in September?

There are normally 4 hours of bright sunshine each day in Reykjavik in September - that's 29% of daylight hours.

Is the sea cold around Reykjavik in September?

The average sea temperature around Reykjavik in September is 10°C.

Does it rain in Reykjavik in September?

There are usually 18 days with some rain in Reykjavik in September and the average monthly rainfall is 86mm.

Reykjavik September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:11 20:42
Monday, 15th September 2025 06:51 19:53
Tuesday, 30th September 2025 07:34 18:59

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^