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Climate · Oslo

Oslo in September

Mild and damp, as the days shorten.

Typical weather, averaged over 30 years

September in Oslo is mild: highs near 65°F, lows near 50°F. Rain falls on about three days a week, and the days shorten by 1 hour 57 minutes from the first week to the last.September in Oslo is mild: highs near 18°C, lows near 10°C. Rain falls on about three days a week, and the days shorten by 1 hour 57 minutes from the first week to the last.

High
65°F18°Caverage
Low
50°F10°Caverage
Wet days
3a week · 38% of days
Daylight
12h 41mon average

Is September a good time to visit Oslo?

A good month, just outside Oslo's best months, which run from June to August.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 65°F in September, against 32°F to 74°F through the year.Highs near 18°C in September, against 0°C to 23°C through the year.

Chance of a wet day

38% of days in September, against 28% to 46% through the year.

Cloud cover

59% cover in September, against 54% to 73% through the year.

Daylight

12h 41m in September, against 6h 02m to 18h 41m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August72°22°low 56°low 13°3 wet days a weekRain on about three days a week.
  2. September65°18°low 50°low 10°3 wet days a weekRain on about three days a week.
  3. October54°12°low 42°low 6°3 wet days a weekRain on about three days a week.

Where Oslo sits, in September

Europe/Oslo
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
6:43 AMsets 7:42 PM
Above the sea
0 mlow-lying
Latitude
59.9°Nnorthern hemisphere
Nearest of ours
Øyer151 km north

The land around Oslo, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Norway in September

high · low · wet days
See September on the planning mapThe whole year in Oslo

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Oslo. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (0 m) against the climate model's (127 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (0 m) against the climate model's (127 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.