Oslo weather
World cities · Norway · 59.91°N 10.75°E
Oslo, in Norway, has its warmest weather in June, when daytime temperatures average 21.4°C, while January nights are the coldest at around -5.2°C. The city sees roughly 958mm of rain a year; July is normally the wettest month and April the driest. Figures are averaged from 2020–2024 observations.
Climate averages
| Month | Avg high | Avg low | Rain | Rain days |
|---|---|---|---|---|
| Jan | -0.2° | -5.2° | 72mm | 10 |
| Feb | 1.8° | -4.1° | 63mm | 11 |
| Mar | 5.1° | -2.4° | 55mm | 9 |
| Apr | 9.9° | 0.9° | 50mm | 8 |
| May | 16.1° | 6.3° | 67mm | 11 |
| Jun | 21.4° | 12.2° | 91mm | 10 |
| Jul | 20.1° | 12.7° | 142mm | 14 |
| Aug | 20° | 12.5° | 91mm | 12 |
| Sep | 16.3° | 9.5° | 85mm | 10 |
| Oct | 10° | 5° | 96mm | 13 |
| Nov | 4.5° | 0.6° | 68mm | 12 |
| Dec | -0.4° | -4.5° | 78mm | 13 |
Seasons in Oslo
Spring (March–May). Daytime highs in Oslo climb from 5.1°C in March to 16.1°C by May, while nights ease from -2.4°C to 6.3°C. The season brings around 172mm of rain in total.
Summer (June–August). The warmest stretch of the year: afternoons average 20.5°C, peaking in June at 21.4°C. June is usually the driest of the summer months (91mm over ~10 rainy days). Around the June solstice, Oslo gets roughly 18.5 hours of daylight.
Autumn (September–November). Daytime temperatures fall from 16.3°C in September to 4.5°C by November, with around 249mm of rain across the season.
Winter (December–February). Nights average -4.6°C, with January the coldest month (average low -5.2°C, daytime high -0.2°C). Expect about 34 days with measurable rain over the three months, and only around 5.5 hours of daylight in mid-December.
How Oslo compares
| Oslo | UK town average | |
|---|---|---|
| Annual rainfall | 958mm | 1054mm |
| Rainy days per year | 133 | 167 |
| Summer daytime high | 20.5°C | 19.7°C |
| Winter night low | -4.6°C | 3.4°C |
Oslo is about 9% drier than the average for the 121 UK towns tracked on this site (1054mm), based on 2020–2024 monthly normals.
Oslo weather FAQs
What is the warmest month in Oslo?
June is typically the warmest month in Oslo, with average daytime highs of 21.4°C. Summer afternoons (June–August) average around 20.5°C.
What is the wettest month in Oslo?
July is usually the wettest month, with around 142mm of rain over roughly 14 rainy days. April is typically the driest (50mm).
How much does it rain in Oslo per year?
Oslo receives roughly 958mm of precipitation per year, spread over about 133 days with at least 1mm of rain (based on 2020–2024 observations).
How cold are winters in Oslo?
Winter nights (December–February) in Oslo average around -4.6°C, with January typically the coldest month (average low -5.2°C).
When is the best time to visit Oslo for good weather?
Late spring and summer offer the most reliable weather in Oslo. June is typically the driest of the warm months (91mm of rain), while June is the warmest, averaging 21.4°C by day — and near the June solstice there are around 18 hours of daylight to enjoy.
How does Oslo's weather compare with the UK?
Oslo receives 958mm of rain a year, about 9% drier than the average for the 121 UK towns tracked on this site (1054mm). Summer daytime highs average 20.5°C against a UK-town average of 19.7°C, and winter nights average -4.6°C versus 3.4°C.