🇧🇬 Weather in Sliven
Map Overlays:
Hourly Forecast for Sliven
06:00
18°
8%
07:00
19°
24%
08:00
18°
20%
09:00
19°
10%
10:00
20°
12%
11:00
22°
17%
12:00
23°
20%
13:00
24°
36%
14:00
25°
17%
15:00
25°
5%
16:00
24°
2%
17:00
25°
4%
18:00
25°
4%
19:00
24°
3%
20:00
21°
19%
21:00
17°
27%
22:00
15°
24%
23:00
14°
64%
00:00
14°
34%
01:00
14°
14%
02:00
14°
14%
03:00
13°
35%
04:00
13°
44%
05:00
13°
12%
14-Day Forecast for Sliven
2026-07-09
Partly Cloudy
25° /
14°
2026-07-10
Sunny
28° /
12°
2026-07-11
Sunny
32° /
15°
2026-07-12
Sunny
32° /
18°
2026-07-13
Sunny
30° /
16°
2026-07-14
Sunny
31° /
16°
2026-07-15
Sunny
30° /
18°
Additional Forecasts for Sliven
Air Quality
💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 105.0 μg/m³
O₃ (Ozone) 57.0 μg/m³
NO₂ (Nitrogen Dioxide) 2.4 μg/m³
SO₂ (Sulphur Dioxide) 2.6 μg/m³
PM2.5 (Fine particles) 6.2 μg/m³
PM10 (Coarse particles) 6.9 μg/m³
Historical Weather
Weather Forecasts for Other Cities in Bulgaria
Weather in Sliven — FAQ
Answers refreshed each request based on current conditions in Sliven.
What is the weather like right now in Sliven?
Right now in Sliven, Bulgaria the temperature is 18.8°C (feels like 12.4°C), with partly cloudy. Relative humidity is 62% and wind is 12.2 km/h.
What is today's high and low temperature in Sliven?
Today's forecast high in Sliven is 25.0°C and the overnight low is 14.0°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Sliven today?
The chance of precipitation in Sliven today is 57%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in Sliven differ from nearby cities?
Even short distances can change temperatures noticeably. Sliven's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.