Lahti monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at Lahti
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | -5.5 | -4.9 | 0.3 | 6.7 | 15 | 19.8 | 21.2 | 19.3 | 13.3 | 7.3 | 1.3 | -2.9 |
| °F | 22.2 | 23.2 | 32.5 | 44 | 58.9 | 67.6 | 70.2 | 66.7 | 56 | 45.2 | 34.4 | 26.8 |
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 | 42 | 31 | 33 | 35 | 38 | 50 | 77 | 86 | 70 | 63 | 58 | 53 |
| inches | 1.6 | 1.2 | 1.3 | 1.4 | 1.5 | 2 | 3 | 3.4 | 2.8 | 2.5 | 2.3 | 2.1 |
| Rainy days | 20 | 16 | 16 | 14 | 11 | 12 | 15 | 17 | 18 | 18 | 21 | 22 |
Average annual rainfall in Lahti: 721.7mm (284.1 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in Lahti
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 0.7 | 1.8 | 3.7 | 5.8 | 8.9 | 5 | 4.2 | 6.9 | 4.3 | 2.6 | 1 | 0.6 |
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 | -12.1 | -12.3 | -8.1 | -1.9 | 3.6 | 8.4 | 10.7 | 9.7 | 5.5 | 1.6 | -3.3 | -8.9 |
| Max °C | -5.3 | -4.7 | 0.5 | 6.9 | 15.3 | 20.1 | 21.5 | 19.5 | 13.5 | 7.5 | 1.5 | -2.8 |
| Min °F | 10.2 | 9.9 | 17.4 | 28.6 | 38.4 | 47 | 51.3 | 49.5 | 41.9 | 34.8 | 26.2 | 16.1 |
| Max °F | 16.3 | 16.7 | 25.2 | 36.5 | 48.9 | 57.6 | 61 | 58.3 | 49.1 | 40.1 | 30.4 | 21.6 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 1.5 | 0.5 | 0.5 | 2 | 5.5 | 10.5 | 15.8 | 17.1 | 14.3 | 10.2 | 6.5 | 3.3 |
| °F | 34.7 | 32.9 | 32.9 | 35.6 | 41.8 | 50.9 | 60.5 | 62.7 | 57.7 | 50.3 | 43.7 | 37.9 |
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 | 10 | 11 | 12 | 12 | 12 | 10 | 10 | 11 | 11 | 11 | 12 |
| mph | 7 | 7 | 7 | 7 | 8 | 7 | 7 | 6 | 7 | 7 | 7 | 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% | 85% | 81% | 75% | 67% | 67% | 73% | 80% | 86% | 87% | 90% | 89% |
Other monthly averages
Lahti weather stats
| Hottest month: | July | 21.2°C 70.2°F |
|---|---|---|
| Driest month: | February | 31mm 1.2ins |
| Sunniest month: | June | 5hrs |
| Coldest month: | January | -5.5°C 22.1°F |
| Wettest month: | August | 86mm 3.4ins |
| Warmest sea: | August | 17.1°C 62.8°F |
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