Overview
Oslo is in Norway. The figures below are long-term monthly averages (2014-2023), not a forecast.
- Warmest month: July, with daytime highs around 22°C.
- Coolest month: January, with daytime highs around 0°C.
- Driest month: April, about 49 mm of rain.
- Wettest month: July, about 102 mm of rain.
- Sunniest month: June, about 13.2 hr of sunshine per day.
- Warmest sea: July, around 19°C.
Climate by month
| Month | Day high | Night low | Sea | Rain (mm) | Rainy days | Sun (h/day) | Humidity | Wind (km/h) |
|---|---|---|---|---|---|---|---|---|
| January | 0°C | -5°C | 3°C | 76 mm | 12 | 2.4 | 85% | 11 km/h |
| February | 2°C | -4°C | 2°C | 68 mm | 11 | 4.6 | 83% | 11 km/h |
| March | 6°C | -2°C | 3°C | 56 mm | 9 | 7.3 | 78% | 10 km/h |
| April | 11°C | 2°C | 6°C | 49 mm | 8 | 10.4 | 66% | 10 km/h |
| May | 16°C | 7°C | 10°C | 78 mm | 12 | 11.4 | 67% | 10 km/h |
| June | 21°C | 12°C | 16°C | 80 mm | 11 | 13.2 | 66% | 10 km/h |
| July | 22°C | 14°C | 19°C | 102 mm | 13 | 12.9 | 70% | 9 km/h |
| August | 20°C | 13°C | 19°C | 96 mm | 14 | 10.5 | 77% | 10 km/h |
| September | 17°C | 10°C | 16°C | 96 mm | 11 | 7.6 | 79% | 10 km/h |
| October | 10°C | 5°C | 12°C | 97 mm | 13 | 4.7 | 85% | 11 km/h |
| November | 5°C | 1°C | 8°C | 91 mm | 13 | 2.3 | 89% | 11 km/h |
| December | 1°C | -3°C | 5°C | 65 mm | 13 | 1.9 | 89% | 9 km/h |
Similar destinations
Data and sources
- Air climate: Open-Meteo Historical Weather API (ERA5 / ERA5-Land reanalysis), 2014-2023. CC BY 4.0 (Open-Meteo); underlying ERA5 data: Copernicus licence
- Sea temperature: NOAA Coral Reef Watch CoralTemp v3.1 monthly SST (5 km), 2014-2023.
- Last updated October 8, 2026.