Capital city, Norway
Oslo weather by month and the best time to visit
When to go to Oslo
May–Sep is mild and light, with fjord swimming and outdoor terraces. Dec–Feb is cold and dark but great for skiing; July is quietest as locals leave.
Oslo weather by month
Average daily high, rainfall and conditions.
- Jan-2°78 mm
- Feb-1°60 mm
- Mar3°56 mm
- Apr10°61 mm
- May16°92 mm
- Jun20°96 mm
- Jul22°112 mm
- Aug20°122 mm
- Sep16°96 mm
- Oct9°104 mm
- Nov3°94 mm
- Dec-1°78 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | -2°C29°F | -7°C20°F | 78 mm | 98% | Freezing |
| February | -1°C30°F | -7°C20°F | 60 mm | 98% | Freezing |
| March | 3°C38°F | -4°C25°F | 56 mm | 93% | Cold |
| April | 10°C50°F | 1°C35°F | 61 mm | 83% | Cold |
| May | 16°C60°F | 6°C44°F | 92 mm | 79% | Cool |
| June | 20°C68°F | 11°C52°F | 96 mm | 78% | Pleasant |
| July | 22°C71°F | 14°C56°F | 112 mm | 81% | Pleasant |
| August | 20°C69°F | 12°C54°F | 122 mm | 84% | Pleasant |
| September | 16°C61°F | 8°C47°F | 96 mm | 87% | Cool |
| October | 9°C48°F | 3°C38°F | 104 mm | 93% | Cold |
| November | 3°C38°F | -1°C30°F | 94 mm | 96% | Cold |
| December | -1°C30°F | -6°C22°F | 78 mm | 97% | Freezing |
Best months across Norway
Quick answers
What is the best month to visit Oslo?
May–Sep. May–Sep is mild and light, with fjord swimming and outdoor terraces. Dec–Feb is cold and dark but great for skiing; July is quietest as locals leave.
When is the rainy season in Oslo?
Rain peaks in August with about 122 mm. No month averages 150 mm or more.
What is the hottest month in Oslo?
July, with average highs of 22°C (71°F).
How cold does Oslo get?
The coolest nights are in January, averaging -7°C (20°F).
More about Oslo
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Sources
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 1.5°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.