Ilomantsi monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at Ilomantsi
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | -9 | -7.5 | -1.3 | 4.8 | 13.1 | 18.6 | 20.6 | 17.9 | 11.7 | 5 | -1.2 | -5.9 |
| °F | 15.8 | 18.5 | 29.6 | 40.6 | 55.7 | 65.4 | 69.1 | 64.2 | 53 | 41 | 29.9 | 21.4 |
Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.
Average rainfall & rainy days
The graph below shows the average rainfall and number of rainy days per month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 38 | 29 | 34 | 37 | 37 | 61 | 79 | 87 | 68 | 66 | 57 | 49 |
| inches | 1.5 | 1.2 | 1.3 | 1.4 | 1.5 | 2.4 | 3.1 | 3.4 | 2.7 | 2.6 | 2.2 | 1.9 |
| Rainy days | 21 | 18 | 17 | 15 | 12 | 15 | 15 | 17 | 18 | 20 | 23 | 24 |
Average annual rainfall in Ilomantsi: 734.167mm (289 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in Ilomantsi
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 0.8 | 2 | 3.8 | 6 | 4.1 | 0 | 4.6 | 7.1 | 4.2 | 2.2 | 0.9 | 0.5 |
Day / night temperatures
The graph below shows the daily range of temperatures for each month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min °C | -15.8 | -14.5 | -9.5 | -3.4 | 2.8 | 8.6 | 11 | 9.3 | 4.8 | 0.1 | -5.8 | -12.3 |
| Max °C | -8.9 | -7.4 | -1.2 | 5 | 13.4 | 18.8 | 20.9 | 18.1 | 11.9 | 5.1 | -1.1 | -5.8 |
| Min °F | 3.7 | 6 | 15 | 26 | 37 | 47.5 | 51.7 | 48.7 | 40.6 | 32.2 | 21.7 | 10 |
| Max °F | 9.9 | 12.4 | 22.5 | 33.4 | 46.6 | 56.7 | 60.6 | 56.7 | 46.9 | 36.7 | 25.9 | 15.8 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 0.8 | 0 | -0 | 0.9 | 3.5 | 7.6 | 11.8 | 13 | 10.9 | 7.4 | 4.5 | 2.3 |
| °F | 33.5 | 32.1 | 31.9 | 33.5 | 38.2 | 45.8 | 53.3 | 55.5 | 51.7 | 45.3 | 40.1 | 36.2 |
Wind speed
The graph below shows the average wind speed.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| km/h | 11 | 11 | 12 | 12 | 12 | 11 | 10 | 10 | 11 | 12 | 12 | 11 |
| mph | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 7 | 7 | 8 | 8 | 7 |
A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.
Relative humidity
The graph below shows the average relative humidity.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 87% | 86% | 81% | 72% | 64% | 66% | 71% | 78% | 84% | 86% | 89% | 89% |
Other monthly averages
Ilomantsi weather stats
| Hottest month: | July | 20.6°C 69.1°F |
|---|---|---|
| Driest month: | February | 29mm 1.1ins |
| Sunniest month: | July | 4.6hrs |
| Coldest month: | January | -9°C 15.8°F |
| Wettest month: | August | 87mm 3.4ins |
| Warmest sea: | August | 13°C 55.4°F |
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