Average annual temperature is 3.4 °C
Absolute maximum temperature: 28.9 °C
Absolute minimum temperature: -24.1 °C
Number of sunny days: 145 days
Number of rainy days: 145 days
Number of snow days: 75 days
Look at detailed online map of Ii
* Weather data for Ii Finland is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 4.7 | 3.7 | 1.8 | 13.8 | 19.2 | 25.7 | 24.6 | 28.9 | 20.2 | 11.0 | 3.4 | 2.3 |
| Average daytime temperature (°C) | -2.0 | -2.8 | -3.9 | 4.8 | 10.1 | 17.4 | 18.6 | 19.6 | 15.1 | 2.9 | -2.1 | -5.3 |
| Average temperature (°C) | -3.9 | -5.2 | -7.0 | 0.3 | 6.6 | 14.3 | 15.8 | 16.7 | 12.8 | 0.9 | -4.1 | -6.9 |
| Average night temperature (°C) | -6.2 | -7.7 | -10.6 | -3.8 | 2.8 | 10.4 | 12.4 | 13.5 | 10.3 | -1.1 | -6.5 | -9.0 |
| Absolute minimum temperature (°C) | -17.5 | -16.1 | -24.1 | -11.7 | -3.6 | 3.7 | 8.8 | 8.2 | 2.9 | -9.4 | -14.7 | -16.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 6.0 | 9.0 | 13.0 | 17.0 | 20.0 | 22.0 | 22.0 | 18.0 | 14.0 | 11.0 | 7.0 | 4.0 |
| Daylight mean duration (h) | 5.0 | 8.3 | 11.8 | 15.3 | 19.0 | 22.1 | 20.3 | 16.6 | 13.1 | 9.6 | 6.1 | 3.7 |
| Daylight minimum duration (h) | 3.0 | 6.0 | 10.0 | 13.0 | 17.0 | 20.0 | 18.0 | 14.0 | 11.0 | 7.0 | 4.0 | 3.0 |
| Sunshine mean duration (h) | 0.8 | 2.0 | 6.3 | 10.2 | 12.8 | 15.0 | 11.7 | 10.5 | 6.5 | 3.6 | 0.8 | 0.2 |
| Precipitation (mm) | 73 | 26 | 38 | 37 | 47 | 66 | 97 | 113 | 120 | 94 | 43 | 35 |
| Sunny days | 11 | 13 | 10 | 19 | 17 | 16 | 9 | 9 | 4 | 14 | 13 | 10 |
| Rainy days | 9 | 2 | 3 | 8 | 11 | 14 | 22 | 22 | 26 | 14 | 9 | 5 |
| Snow days | 11 | 13 | 18 | 3 | 3 | 0 | 0 | 0 | 0 | 3 | 8 | 16 |
The best time to visit Ii during the most sunny months:
Months with the longest average daylight duration in Ii:
The largest precipitation sum in Ii is at