Average annual temperature is 6.2 °C
Absolute maximum temperature: 29.2 °C
Absolute minimum temperature: -19.5 °C
Number of sunny days: 129 days
Number of rainy days: 179 days
Number of snow days: 57 days
Look at detailed online map of Heinäsuo
* Weather data for Heinäsuo 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) | 3.5 | 6.1 | 7.7 | 16.6 | 24.4 | 29.0 | 24.4 | 29.2 | 21.2 | 14.9 | 8.2 | 4.2 |
| Average daytime temperature (°C) | 0.2 | 0.1 | 1.0 | 9.8 | 15.6 | 22.1 | 20.2 | 20.1 | 18.0 | 7.3 | 1.7 | -2.5 |
| Average temperature (°C) | -1.7 | -2.4 | -2.5 | 4.4 | 10.4 | 16.9 | 16.3 | 16.9 | 14.8 | 4.7 | 0.0 | -4.4 |
| Average night temperature (°C) | -4.0 | -6.3 | -7.1 | -1.2 | 4.1 | 10.4 | 12.1 | 13.7 | 11.5 | 2.0 | -1.8 | -6.5 |
| Absolute minimum temperature (°C) | -19.5 | -15.3 | -15.3 | -14.1 | -3.6 | 3.1 | 9.6 | 11.5 | 5.4 | -3.7 | -12.1 | -15.6 |
| 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) | 6.8 | 9.1 | 11.8 | 14.6 | 17.2 | 18.8 | 18.0 | 15.6 | 12.9 | 10.1 | 7.5 | 5.9 |
| Daylight minimum duration (h) | 5.0 | 7.0 | 10.0 | 13.0 | 16.0 | 18.0 | 16.0 | 14.0 | 11.0 | 8.0 | 6.0 | 5.0 |
| Sunshine mean duration (h) | 1.2 | 2.9 | 5.7 | 11.4 | 13.0 | 15.5 | 13.2 | 9.3 | 7.3 | 4.8 | 1.3 | 0.5 |
| Precipitation (mm) | 91 | 39 | 86 | 15 | 39 | 21 | 89 | 141 | 28 | 107 | 87 | 54 |
| Sunny days | 10 | 16 | 9 | 22 | 19 | 20 | 1 | 7 | 7 | 8 | 4 | 6 |
| Rainy days | 14 | 6 | 10 | 8 | 12 | 10 | 30 | 24 | 23 | 20 | 15 | 7 |
| Snow days | 7 | 6 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 11 | 18 |
The best time to visit Heinäsuo during the most sunny months:
Months with the longest average daylight duration in Heinäsuo:
The largest precipitation sum in Heinäsuo is at