Oslo climate at a glance
Oslo sees average daytime highs ranging from 0°C in January to 22°C in June. Around 988 mm of precipitation falls over roughly 140 wet days a year, peaking in July (129 mm) and easing off in April (48 mm). June is the sunniest month at about 13 hours of sunshine. Snow is a regular feature from December to March.
Oslo temperature & rainfall by month
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Weather seasons in Oslo
Grouped by the monthly travel score — purely weather-based, not crowd or price data.
Oslo climate, month by month
Averages computed from ERA5 reanalysis data, 2019–2024. Daylight on the 15th: 18.4 h in June. Reuse this data freely with attribution — download as JSON or CSV.
| Month | High | Low | Rain days | Rainfall | Sun/day | Humidity | Score |
|---|---|---|---|---|---|---|---|
| January | 0°C | -5°C | 10.3 | 67 mm | 2.8 h | 83% | 0.0 · Challenging |
| February | 3°C | -3°C | 11.3 | 65 mm | 4.9 h | 81% | 0.0 · Challenging |
| March | 6°C | -2°C | 9.7 | 62 mm | 7.3 h | 77% | 2.2 · Challenging |
| April | 11°C | 2°C | 7.5 | 48 mm | 10.5 h | 63% | 6.1 · Fair |
| May | 16°C | 7°C | 12.2 | 79 mm | 11.9 h | 64% | 7.9 · Good |
| June | 22°C | 13°C | 11.7 | 94 mm | 13 h | 68% | 8.9 · Excellent |
| July | 21°C | 14°C | 14 | 129 mm | 12.1 h | 72% | 8.4 · Good |
| August | 21°C | 13°C | 12.3 | 92 mm | 10.4 h | 76% | 8.8 · Excellent |
| September | 17°C | 10°C | 10.2 | 94 mm | 7.5 h | 79% | 8.2 · Good |
| October | 10°C | 5°C | 14 | 99 mm | 4.8 h | 86% | 3.4 · Poor |
| November | 5°C | 1°C | 12.5 | 81 mm | 2.3 h | 87% | 0.3 · Challenging |
| December | 1°C | -3°C | 14 | 77 mm | 1.8 h | 88% | 0.0 · Challenging |
Frequently asked questions
What is the best time to visit Oslo?
The best time to visit Oslo is June–September, when daytime highs average around 22°C with about 11.7 rainy days per month.
What is the hottest month in Oslo?
June is the hottest month in Oslo, with average highs of 22°C.
What is the rainiest month in Oslo?
July is the rainiest month in Oslo, with around 129 mm of rainfall over 14 rainy days.
Where should you go next month?
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