Sumy Climate: Weather by Month and Best Time to Visit
Best months for Sumy: August, June, July, September.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -3°C | -8°C | 42 mm | 10 | – | – | 3.8 |
| February | -2°C | -8°C | 35 mm | 9 | – | – | 3.9 |
| March | 4°C | -3°C | 42 mm | 10 | – | – | 4.6 |
| April | 14°C | 4°C | 43 mm | 9 | – | – | 6.5 |
| May | 20°C | 9°C | 62 mm | 12 | – | – | 7.2 |
| June | 24°C | 13°C | 66 mm | 11 | – | – | 7.6 |
| July | 26°C | 15°C | 73 mm | 11 | – | – | 7.6 |
| August | 25°C | 13°C | 47 mm | 7 | – | – | 8.1 |
| September | 19°C | 9°C | 52 mm | 8 | – | – | 7.5 |
| October | 11°C | 3°C | 49 mm | 9 | – | – | 6.2 |
| November | 3°C | -2°C | 41 mm | 8 | – | – | 4.7 |
| December | -1°C | -6°C | 41 mm | 9 | – | – | 3.9 |