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Sums'ka Oblast' > 
| Month | Max. | Min. | Avg. |
|---|---|---|---|
| January | 4°C | -19°C | -6°C |
| February | 8°C | -6°C | 1°C |
| March | 21°C | -5°C | 5°C |
| April | 25°C | 1°C | 13°C |
| May | 26°C | 1°C | 13°C |
| June | 30°C | 11°C | 19°C |
| July | 37°C | 13°C | 24°C |
| August | 37°C | 11°C | 23°C |
| September | 33°C | 8°C | 19°C |
| October | 25°C | -2°C | 10°C |
| November | 16°C | -9°C | 4°C |
| December | 6°C | -11°C | -1°C |
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