Sliven Climate: Weather by Month and Best Time to Visit
Best months for Sliven: September, August, July.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 3°C | -3°C | 53 mm | 8 | – | – | 4.7 |
| February | 6°C | -2°C | 54 mm | 8 | – | – | 5.1 |
| March | 10°C | 1°C | 67 mm | 11 | – | – | 5.5 |
| April | 15°C | 5°C | 75 mm | 13 | – | – | 6.3 |
| May | 20°C | 10°C | 106 mm | 15 | – | – | 6.7 |
| June | 24°C | 14°C | 100 mm | 14 | – | – | 7.1 |
| July | 27°C | 16°C | 88 mm | 12 | – | – | 7.5 |
| August | 27°C | 16°C | 56 mm | 8 | – | – | 8.0 |
| September | 22°C | 12°C | 58 mm | 8 | – | – | 8.1 |
| October | 16°C | 7°C | 63 mm | 8 | – | – | 7.1 |
| November | 10°C | 3°C | 58 mm | 8 | – | – | 6.1 |
| December | 4°C | -2°C | 63 mm | 9 | – | – | 4.8 |