Sumy monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at Sumy
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | -4.7 | -3.3 | 2.4 | 12.8 | 20.5 | 23.6 | 24.6 | 24.1 | 18.5 | 11 | 3.2 | -1.7 |
| °F | 23.5 | 26.1 | 36.3 | 55.1 | 69 | 74.4 | 76.4 | 75.4 | 65.3 | 51.7 | 37.7 | 29 |
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 | 44 | 34 | 36 | 40 | 52 | 65 | 76 | 61 | 48 | 43 | 49 | 49 |
| inches | 1.7 | 1.3 | 1.4 | 1.6 | 2.1 | 2.6 | 3 | 2.4 | 1.9 | 1.7 | 1.9 | 1.9 |
| Rainy days | 14 | 11 | 12 | 11 | 12 | 14 | 14 | 11 | 11 | 10 | 13 | 15 |
Average annual rainfall in Sumy: 679.967mm (267.7 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in Sumy
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 2.1 | 2.9 | 4.1 | 5.9 | 8.1 | 8.8 | 9 | 8.4 | 6.5 | 4.2 | 1.5 | 1.2 |
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 | -10.9 | -9.7 | -4.4 | 3.4 | 9.4 | 12.6 | 14.1 | 13 | 8.3 | 2.9 | -1.9 | -6.9 |
| Max °C | -4.6 | -3.1 | 2.6 | 13.1 | 20.8 | 23.9 | 24.9 | 24.4 | 18.8 | 11.2 | 3.3 | -1.6 |
| Min °F | 12.5 | 14.5 | 24.2 | 38 | 48.9 | 54.6 | 57.4 | 55.4 | 46.9 | 37.1 | 28.6 | 19.7 |
| Max °F | 18.1 | 20.5 | 30.4 | 46.8 | 59.2 | 64.8 | 67.1 | 65.7 | 56.3 | 44.6 | 33.3 | 24.4 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 4.8 | 4 | 4.2 | 6.8 | 12.2 | 17.5 | 20.6 | 21.3 | 18 | 13.3 | 8.8 | 6 |
| °F | 40.6 | 39.2 | 39.6 | 44.2 | 54 | 63.5 | 69.1 | 70.3 | 64.4 | 55.9 | 47.9 | 42.9 |
Wind speed
The graph below shows the average wind speed.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| km/h | 16 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 12 | 14 | 15 | 16 |
| mph | 10 | 10 | 9 | 9 | 8 | 7 | 7 | 7 | 7 | 9 | 9 | 10 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 86% | 84% | 82% | 70% | 64% | 69% | 72% | 72% | 75% | 80% | 87% | 89% |
Other monthly averages
Sumy weather stats
| Hottest month: | July | 24.6°C 76.3°F |
|---|---|---|
| Driest month: | February | 34mm 1.3ins |
| Sunniest month: | August | 8.4hrs |
| Coldest month: | January | -4.7°C 23.5°F |
| Wettest month: | July | 76mm 3ins |
| Warmest sea: | August | 21.3°C 70.3°F |
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