Climate averages 1991–2020
Sliven weather
in August.
A hot, moderately wet month: the warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Sliven: daytime highs average 28.1°C and nights cool to about 17.9°C. By daytime temperature it is the warmest month of the year.
Expect about 56 mm of rain on roughly 8 days, which makes August a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 55 min on an average August day.
The nearest other city in this atlas is Stara Zagora (63 km away). In August its highs average 29.2°C, 1.0°C warmer than Sliven, with 41 mm of rain.
Among the 10 cities listed in Bulgaria, Sliven ranks 5th of 10 for the warmest August highs and 10th of 10 for the driest August (rainfall, lowest first). The mean August high of those 10 cities is 27.9°C; Sliven is 0.2°C warmer than that mean.
From August to September, average highs fall by 4.7°C to 23.4°C, and monthly rainfall rises from 56 mm to 58 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Sliven climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.4°C-1.4°C | -1.4°C | 53 | 7.7 | 9.49 h |
| February | 7.4°C-0.5°C | -0.5°C | 54 | 8.1 | 10.511 h |
| March | 11.2°C2.2°C | 2.2°C | 67 | 10.7 | 11.912 h |
| April | 16.4°C6.6°C | 6.6°C | 75 | 12.2 | 13.413 h |
| May | 21.4°C11.6°C | 11.6°C | 106 | 14.5 | 14.615 h |
| June | 25.3°C15.8°C | 15.8°C | 100 | 14.0 | 15.315 h |
| July | 27.7°C17.9°C | 17.9°C | 88 | 11.6 | 15.015 h |
| August, selected | 28.1°C17.9°C | 17.9°C | 56 | 8.0 | 13.914 h |
| September | 23.4°C14.1°C | 14.1°C | 58 | 7.8 | 12.513 h |
| October | 17.6°C9.6°C | 9.6°C | 63 | 7.8 | 11.111 h |
| November | 11.8°C4.8°C | 4.8°C | 58 | 7.4 | 9.810 h |
| December | 6.5°C0.2°C | 0.2°C | 63 | 8.6 | 9.19 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Stara Zagora in AugustBulgaria · 63 kmHigh 29.2°C · Low 17.9°C · 41 mm rain
- Shumen in AugustBulgaria · 81 kmHigh 27.5°C · Low 17.1°C · 37 mm rain
- Burgas in AugustBulgaria · 96 kmHigh 27.8°C · Low 19.1°C · 29 mm rain
- Edirne in AugustTurkey · 114 kmHigh 31.6°C · Low 19.3°C · 16 mm rain
- Ruse in AugustBulgaria · 133 kmHigh 29.2°C · Low 19.0°C · 48 mm rain
- Varna in AugustBulgaria · 142 kmHigh 27.3°C · Low 19.7°C · 33 mm rain
- Plovdiv in AugustBulgaria · 142 kmHigh 28.8°C · Low 17.9°C · 24 mm rain
- Pleven in AugustBulgaria · 161 kmHigh 29.3°C · Low 18.6°C · 46 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sliven) is explained once on the Sliven year overview and on the Sources, method and limits page.