Oslo Weather in September
15.3°C high · 7.4°C low · 79 mm rain · 4.1h sun
Sep is a warm month in Oslo — not peak season, but a good time to avoid crowds.
September at a glance
| Metric | Value |
|---|---|
| Average high | 15.3°C |
| Average low | 7.4°C |
| Rainfall | 79 mm |
| Sunshine | 4.1 hours/day |
| Daylight | 12.5 hours |
What to pack in September
Pack a jacket and layers for Oslo in September.
Oslo weather by month
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Frequently asked questions
What is the weather in Oslo in September?
Highs of 15.3°C and lows of 7.4°C, with about 79 mm of rain and 4.1 hours of sunshine per day.
Is September a good time to visit Oslo?
Sep is a warm month in Oslo — not peak season, but a good time to avoid crowds.
What to do in Oslo · Best time to visit Oslo
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.