Climate in Sumy: average temperature by month
In Sumy the warmest month is July, with 26.7 °C on average in the afternoon; the coolest is January, with -2.3 °C.
The average of the weather stations Kursk (134 km), Kharkiv (142 km) and Poltava (147 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | -2.3 °C | -3.0 °C – -1.4 °C |
| February | -1.5 °C | -2.5 °C – 0.7 °C |
| March | 5.0 °C | 1.2 °C – 9.7 °C |
| April | 14.2 °C | 10.1 °C – 18.2 °C |
| May | 20.6 °C | 18.4 °C – 23.0 °C |
| June | 24.8 °C | 23.2 °C – 25.9 °C |
| July | 26.7 °C | 26.0 °C – 27.4 °C |
| August | 26.4 °C | 24.2 °C – 27.4 °C |
| September | 20.3 °C | 16.6 °C – 24.0 °C |
| October | 12.3 °C | 8.3 °C – 16.3 °C |
| November | 4.2 °C | 0.8 °C – 8.0 °C |
| December | -0.5 °C | -1.3 °C – 0.7 °C |