Experience the charm of Oslo, where its unique maritime climate offers four distinct seasons. Summer (June-August) boasts temperatures averaging 15°C (59°F), making it the perfect time to explore lush Frogner Park or take a swim in the Oslofjord. Autumn (September-October) showers the city with vibrant foliage and crisp air, while winter (December-February) brings subzero temperatures, ideal for winter sports at Holmenkollbakken ski jump. Interestingly, Oslo receives more rainfall in summer than London! Don't miss a visit to Vigeland Sculpture Park, especially enchanting under the Northern Lights during winter nights.
Today's Forecast
5-Day Forecast
Oslo Climate & Weather Averages
Across the year, Oslo swings between average daytime highs of 21°C in July and -1°C in January. Rain peaks in July, while April is typically the driest month. Every figure below comes from daily weather records for 2015–2024 — not long-range estimates.
Few cities change character with the calendar like Oslo. Summer is genuinely warm (21°C average highs in July); winter is genuinely cold (-1°C by day in January, -6°C at night), and white: expect snowfall on roughly 59 days a year, mostly from November to May. Pack for the season, not the destination.
| Month | Avg High | Avg Low | Rainfall | Sunshine (h/day) | Wind (km/h) | Snow days |
|---|---|---|---|---|---|---|
| Jan | -1° | -6° | 73 mm | 2.7 | 16 | 14 |
| Feb | 1° | -5° | 60 mm | 4.7 | 16 | 12 |
| Mar | 5° | -3° | 58 mm | 7.1 | 15 | 9 |
| Apr | 10° | 1° | 50 mm | 10.3 | 16 | 4 |
| May | 16° | 7° | 78 mm | 11.7 | 16 | 1 |
| Jun | 21° | 12° | 86 mm | 13.1 | 16 | — |
| Jul | 21° | 13° | 111 mm | 12.5 | 15 | — |
| Aug | 20° | 12° | 94 mm | 10.5 | 16 | — |
| Sep | 16° | 10° | 101 mm | 7.5 | 16 | — |
| Oct | 10° | 5° | 83 mm | 4.8 | 16 | 1 |
| Nov | 4° | 0° | 80 mm | 2.6 | 16 | 6 |
| Dec | 1° | -4° | 67 mm | 1.9 | 14 | 12 |
Expect around 13.1 hours of sun a day at the June peak, against about 1.9 hours in December. Wind stays moderate most of the year, strongest in February with daily peaks near 16 km/h.
Best time to visit: Aim for June–August if you can: highs hover near 21°C and rain is lighter than the July peak. Pack strictly by season: summer calls for light layers, winter for a serious coat, hat, and gloves.
Oslo weather — frequently asked questions
What is the rainiest month in Oslo?
July is on average the wettest month in Oslo, with about 111 mm of rainfall. The driest month is typically April, at around 50 mm.
Does it snow in Oslo?
Yes. Oslo averages about 59 days with snowfall per year, falling mostly between November and May.
How cold are winters in Oslo?
January is the coldest month in Oslo: daytime highs average just -1°C and nights drop to around -6°C.
What is the sunniest month in Oslo?
June, with roughly 13.1 hours of sunshine a day on average over 2015–2024. The dimmest month is December, at about 1.9 hours.
When is the best time to visit Oslo?
Weather-wise, June–August is the sweet spot in Oslo: average daytime highs around 21°C with less rain than the July peak. Data from 2015–2024.
Source: Open-Meteo ERA5 archive. Averages computed from daily records.