Average annual temperature is 6.0 °C
Absolute maximum temperature: 30.0 °C
Absolute minimum temperature: -15.8 °C
Number of sunny days: 149 days
Number of rainy days: 164 days
Number of snow days: 52 days
Look at detailed online map of Oslo County
* Weather data for Oslo County Norway is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 4.8 | 7.3 | 6.1 | 17.2 | 23.6 | 30.0 | 25.6 | 22.0 | 23.4 | 15.5 | 5.1 | 5.2 |
| Average daytime temperature (°C) | 0.1 | 2.4 | 1.8 | 9.4 | 16.6 | 23.8 | 19.0 | 18.5 | 17.2 | 7.8 | 0.8 | -3.4 |
| Average temperature (°C) | -2.3 | -1.0 | -2.4 | 4.7 | 11.2 | 18.4 | 15.4 | 15.2 | 13.8 | 4.9 | -1.0 | -5.6 |
| Average night temperature (°C) | -5.0 | -5.1 | -7.3 | 0.3 | 4.6 | 11.9 | 11.3 | 11.9 | 10.3 | 2.0 | -3.0 | -8.4 |
| Absolute minimum temperature (°C) | -15.5 | -14.1 | -15.8 | -5.1 | -1.7 | 5.0 | 8.8 | 8.6 | 5.8 | -3.9 | -10.5 | -13.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 7.0 | 10.0 | 13.0 | 15.0 | 18.0 | 18.0 | 18.0 | 16.0 | 14.0 | 11.0 | 8.0 | 6.0 |
| Daylight mean duration (h) | 6.9 | 9.2 | 11.8 | 14.6 | 17.2 | 18.7 | 17.9 | 15.6 | 12.9 | 10.1 | 7.6 | 6.1 |
| Daylight minimum duration (h) | 6.0 | 7.0 | 10.0 | 13.0 | 15.0 | 18.0 | 16.0 | 14.0 | 11.0 | 8.0 | 6.0 | 5.0 |
| Sunshine mean duration (h) | 2.0 | 5.3 | 6.4 | 8.5 | 12.8 | 14.2 | 11.2 | 8.2 | 6.7 | 5.0 | 1.6 | 1.1 |
| Precipitation (mm) | 109 | 41 | 69 | 141 | 17 | 59 | 171 | 244 | 114 | 44 | 75 | 54 |
| Sunny days | 10 | 16 | 11 | 14 | 21 | 22 | 3 | 2 | 8 | 19 | 9 | 14 |
| Rainy days | 14 | 5 | 9 | 15 | 10 | 8 | 28 | 29 | 22 | 9 | 11 | 4 |
| Snow days | 7 | 7 | 11 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 10 | 13 |
The best time to visit Oslo County during the most sunny months:
Months with the longest average daylight duration in Oslo County:
The largest precipitation sum in Oslo County is at