UTC Offset
UTC+03:00
Sliven, Bulgaria Snapshot 2026
Where is Sliven?
Sliven, Bulgaria
- Continent
- Europe
- Country
- Bulgaria
- City
- Sliven
- Population
- 83.7K
- Coordinates
- 42.69°, 26.33°
Sliven is a city in Bulgaria with a population of approximately 83.7K. Average temperatures range from 0°C (31°F) in January to 30°C (85°F) in August. The best time to visit is June, July, August, September, October.
Time in Sliven right now
Open full time & time zone page 19:57 57
Tuesday, June 16, 2026
IANA time zone
Europe/Sofia
Daylight saving
DST in effect
CEST / EEST
Next DST change
October 25
backward -1h
Live weather in Sliven
Daylight in Sliven today
View full sunrise & sunset page Sunrise
Sunset
Day length
15h 18m
Climate normals for Sliven
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Fair April
Good May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October best
Excellent November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 6°C / 0°C | 3°C / -4°C | 9days (61 mm) Wet | 6h Fair | 79% Humid | 2.1 Moderate | Poor | View Details |
| February | 9°C / 1°C | 6°C / -2°C | 8days (48 mm) Wet | 7.1h Good | 77% Humid | 2.9 Moderate | Poor | View Details |
| March | 13°C / 3°C | 10°C / 0°C | 10days (57 mm) Wet | 8.3h Good | 74% Muggy | 4 Moderate | Fair | View Details |
| April | 17°C / 7°C | 16°C / 5°C | 11days (68 mm) Wet | 10.3h Excellent | 70% Muggy | 5.5 High | Good | View Details |
| May | 21°C / 11°C | 21°C / 11°C | 15days (106 mm) Wet | 11.5h Excellent | 72% Muggy | 6.2 High | Good | View Details |
| June best | 26°C / 17°C | 28°C / 17°C | 13days (105 mm) Wet | 12.8h Excellent | 71% Muggy | 7.1 Very High | Excellent | View Details |
| July best | 29°C / 19°C | 31°C / 20°C | 9days (63 mm) Wet | 13.1h Excellent | 62% Muggy | 7.2 Very High | Excellent | View Details |
| August best | 30°C / 19°C | 30°C / 20°C | 7days (39 mm) Good | 12.4h Excellent | 60% Moderate | 6.6 High | Excellent | View Details |
| September best | 25°C / 15°C | 24°C / 15°C | 5days (34 mm) Good | 10.5h Excellent | 63% Muggy | 5.2 High | Excellent | View Details |
| October best | 19°C / 10°C | 17°C / 8°C | 6days (59 mm) Good | 8.1h Good | 72% Muggy | 3.6 Moderate | Excellent | View Details |
| November | 13°C / 6°C | 11°C / 4°C | 9days (69 mm) Wet | 5.8h Fair | 82% Humid | 2.1 Moderate | Fair | View Details |
| December | 8°C / 2°C | 6°C / -1°C | 9days (68 mm) Wet | 5.3h Fair | 82% Humid | 1.7 Low | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 6°C / 0°C . Feb: 9°C / 1°C . Mar: 13°C / 3°C . Apr: 17°C / 7°C . May: 21°C / 11°C . Jun: 26°C / 17°C . Jul: 29°C / 19°C . Aug: 30°C / 19°C . Sep: 25°C / 15°C . Oct: 19°C / 10°C . Nov: 13°C / 6°C . Dec: 8°C / 2°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 61 mm. Feb: 48 mm. Mar: 57 mm. Apr: 68 mm. May: 106 mm. Jun: 105 mm. Jul: 63 mm. Aug: 39 mm. Sep: 34 mm. Oct: 59 mm. Nov: 69 mm. Dec: 68 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 79%. Feb: 77%. Mar: 74%. Apr: 70%. May: 72%. Jun: 71%. Jul: 62%. Aug: 60%. Sep: 63%. Oct: 72%. Nov: 82%. Dec: 82%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 13 km/h . Feb: 14 km/h . Mar: 14 km/h . Apr: 14 km/h . May: 13 km/h . Jun: 12 km/h . Jul: 12 km/h . Aug: 13 km/h . Sep: 13 km/h . Oct: 12 km/h . Nov: 12 km/h . Dec: 12 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 4. Apr: UV 6. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 7. Sep: UV 5. Oct: UV 4. Nov: UV 2. Dec: UV 2.
Frequently Asked Questions
Sliven has a population of approximately 83.7K.
The best months to visit Sliven are June, July, August, September, October, when temperatures are pleasant and rainfall is lower.
Sliven receives approximately 777mm of rainfall annually across 111 rainy days.
Sliven is located in Bulgaria, in the Europe region.