Weather in Oslo in September
In an average September, Oslo sees a daily high around 15°C and a low around 8°C, based on 1980–2026 of local climate records.
| Average high | 15°C |
|---|---|
| Typical high range | 12°C to 19°C |
| Average low | 8°C |
| Typical low range | 4°C to 11°C |
| Average daily precipitation | 3 mm |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
25°C
2024-09-05
Lowest
6°C
1985-09-06
Low
Highest
15°C
2025-09-10
Lowest
-2°C
1990-09-27
Feels-like
Highest
25°C
2024-09-05
Lowest
-7°C
1990-09-26
Humidity
Highest
14.6 g/m³
2024-09-05
Lowest
3.9 g/m³
1983-09-28
Wind
Highest
34 km/h
1994-09-15
Lowest
4 km/h
2019-09-24
Gust
Highest
99 km/h
1994-09-15
Lowest
10 km/h
2008-09-17
Precip
Wettest
233 mm
2015
Driest
28 mm
1989
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