Climate averages 1991–2020
Sliven weather
in April.
A mild, moderately wet month: the 7th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Sliven: daytime highs average 16.4°C and nights cool to about 6.6°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 75 mm of rain on roughly 12 days, which makes April a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 21 min on an average April day.
The nearest other city in this atlas is Stara Zagora (63 km away). In April its highs average 17.1°C, 0.7°C warmer than Sliven, with 60 mm of rain.
Among the 10 cities listed in Bulgaria, Sliven ranks 5th of 10 for the warmest April highs and 10th of 10 for the driest April (rainfall, lowest first). The mean April high of those 10 cities is 16.2°C; Sliven is 0.2°C warmer than that mean.
From April to May, average highs rise by 4.9°C to 21.4°C, and monthly rainfall rises from 75 mm to 106 mm.
The annual picture
April 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, selected | 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 | 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
April in nearby cities
- Stara Zagora in AprilBulgaria · 63 kmHigh 17.1°C · Low 6.3°C · 60 mm rain
- Shumen in AprilBulgaria · 81 kmHigh 15.9°C · Low 5.3°C · 52 mm rain
- Burgas in AprilBulgaria · 96 kmHigh 16.0°C · Low 7.0°C · 45 mm rain
- Edirne in AprilTurkey · 114 kmHigh 18.1°C · Low 6.7°C · 42 mm rain
- Ruse in AprilBulgaria · 133 kmHigh 17.6°C · Low 7.4°C · 55 mm rain
- Varna in AprilBulgaria · 142 kmHigh 14.6°C · Low 7.1°C · 39 mm rain
- Plovdiv in AprilBulgaria · 142 kmHigh 17.0°C · Low 6.2°C · 46 mm rain
- Pleven in AprilBulgaria · 161 kmHigh 17.9°C · Low 7.3°C · 57 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.