Oslo weather in September
September is a fair month to visit Oslo: highs of 14°C (58°F) and about 96 mm (3.8 in) of rain on average. Nights average 7°C (44°F) and cloud cover 73% (NASA POWER, 2001–2025 averages). It is the 5th wettest month of the year and the 4th warmest. Compared with August, it is cooler and drier; October brings highs of 7°C (45°F) and 104 mm (4.1 in) of rain.
Is September a good time to visit Oslo?
fair month Weather score 53/100.
September is a fair month in Oslo. The weather is usually best in Jun–Aug.
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Does it rain a lot in Oslo in September?
Some rain is normal: about 96 mm (3.8 in) falls in an average September. It is the 5th wettest month of the year.
How warm is Oslo in September?
Days average 14°C (58°F) and nights 7°C (44°F).
Oslo weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | -3°C (26°F) | -8°C (17°F) | 78 mm | 83% | least pleasant |
| February | -2°C (28°F) | -8°C (17°F) | 60 mm | 82% | least pleasant |
| March | 2°C (35°F) | -5°C (22°F) | 56 mm | 74% | least pleasant |
| April | 8°C (47°F) | 0°C (32°F) | 61 mm | 70% | fair |
| May | 14°C (58°F) | 5°C (41°F) | 92 mm | 68% | fair |
| June | 18°C (65°F) | 9°C (49°F) | 96 mm | 68% | best |
| July | 20°C (69°F) | 12°C (53°F) | 112 mm | 71% | best |
| August | 19°C (66°F) | 11°C (51°F) | 122 mm | 71% | best |
| September | 14°C (58°F) | 7°C (44°F) | 96 mm | 73% | fair |
| October | 7°C (45°F) | 2°C (35°F) | 104 mm | 77% | least pleasant |
| November | 2°C (35°F) | -3°C (27°F) | 94 mm | 82% | least pleasant |
| December | -3°C (27°F) | -7°C (19°F) | 78 mm | 82% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
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