Average annual temperature is 9.3 °C
Absolute maximum temperature: 32.7 °C
Absolute minimum temperature: -18.3 °C
Number of sunny days: 168
Number of rainy days: 170
Number of snow days: 27
Average annual precipitation: 854 mm
Look at detailed online map of Sumy
* Weather data for Sumy Ukraine is based on climate observations for 2023 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 9.4 | 5.4 | 16.4 | 19.1 | 25.5 | 27.9 | 30.9 | 32.7 | 25.5 | 23.6 | 15.8 | 5.7 |
| Average daytime temperature (°C) | 0.4 | -0.2 | 8 | 13.7 | 19.6 | 23.1 | 24.8 | 26.5 | 22 | 13.2 | 5.8 | 0.8 |
| Average temperature (°C) | -2.4 | -3 | 3.7 | 9.7 | 14.4 | 18.3 | 20.2 | 21.4 | 16.2 | 9.4 | 3.4 | -1.1 |
| Average night temperature (°C) | -5.2 | -6.8 | -0.2 | 5.9 | 8.4 | 12.8 | 15.4 | 16.2 | 10.6 | 4.9 | 0.7 | -3.5 |
| Absolute minimum temperature (°C) | -18.3 | -17.4 | -5.7 | 3.5 | 1.1 | 5.6 | 11.2 | 12.4 | 7.8 | -2.7 | -7.9 | -11.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.2 | 10.9 | 12.9 | 14.7 | 16.2 | 16.5 | 16.5 | 15.4 | 13.6 | 11.7 | 9.7 | 8.3 |
| Daylight mean duration (h) | 8.5 | 10 | 11.9 | 13.8 | 15.5 | 16.5 | 16 | 14.5 | 12.6 | 10.7 | 9 | 8 |
| Daylight minimum duration (h) | 8 | 9.2 | 10.9 | 12.9 | 14.8 | 16.2 | 15.4 | 13.6 | 11.7 | 9.8 | 8.3 | 7.9 |
| Sunshine mean duration (h) | 4.5 | 4.7 | 6.6 | 8.5 | 11.7 | 11.1 | 12 | 11.9 | 10.4 | 6.1 | 4.3 | 2.3 |
| Precipitation (mm) | 18 | 46 | 44 | 58 | 32 | 77 | 114 | 114 | 23 | 119 | 125 | 82 |
| Sunny days | 23 | 10 | 9 | 10 | 22 | 15 | 9 | 17 | 27 | 12 | 8 | 6 |
| Rainy days | 5 | 8 | 18 | 20 | 9 | 15 | 22 | 14 | 3 | 19 | 19 | 18 |
| Snow days | 3 | 10 | 4 | 3 | 7 |
The best time to visit Sumy during the most sunny months:
Months with the longest average daylight duration in Sumy:
The largest precipitation sum in Sumy is at