Annual mean 14°C · wettest around May · prevailing wind N
Warmest
30.1 °C
Coldest
3.7 °C
Wettest
17%
Windiest
4.6 m/s
Prevailing
N
3.8 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Sliven over the whole year is 14°C. July is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 1°C. Sliven has no sharply defined rainy season: the chance of rain on a given day runs from 4% in August, the driest month, to 13% in May, the wettest. Winds in Sliven are highest in February, averaging 3.4 m/s (12 km/h), and lightest in October, at 2.7 m/s (10 km/h). The prevailing wind is from the N. The clearest skies in Sliven come in August, when the sky is typically 31% covered; December is the cloudiest month, at 67%.
Month by month Sliven climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
5°C
1°C
0°C
10%
64%
3.3 m/s
0
0
19
February
8°C
2°C
3°C
8%
63%
3.4 m/s
3
0
31
March
11°C
4°C
7°C
10%
63%
3.3 m/s
11
0
51
April
16°C
8°C
13°C
10%
55%
3.4 m/s
41
2
71
May
21°C
12°C
18°C
13%
58%
3.3 m/s
72
13
71
June
27°C
17°C
26°C
10%
46%
2.8 m/s
56
55
26
July
30°C
19°C
28°C
5%
34%
3.2 m/s
40
68
12
August
30°C
19°C
28°C
4%
31%
3.4 m/s
40
70
11
September
25°C
15°C
22°C
5%
41%
3.3 m/s
71
39
45
October
18°C
10°C
16°C
7%
47%
2.7 m/s
62
6
78
November
12°C
6°C
8°C
11%
66%
2.8 m/s
16
0
59
December
7°C
3°C
3°C
11%
67%
3.1 m/s
2
0
25
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Sliven weather by season
Year round, Sliven has days of about 5°C at their warmest in January, its coolest month, and 30°C in July, its warmest; the coolest hours of the day run from 1°C to 19°C through the year, and the average temperature over the year is 14°C around the clock. Rain is most likely around May and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Sliven weather in winterDecember to February
High 6°CLow 2°CRain 10%
Winter in Sliven has typical daily highs of about 6°C and lows of about 2°C, with a 10% chance of rain on a given day.
Sliven weather in springMarch to May
High 16°CLow 8°CRain 11%
Spring in Sliven has typical daily highs of about 16°C and lows of about 8°C, with a 11% chance of rain on a given day.
Sliven weather in summerJune to August
High 29°CLow 19°CRain 7%
Summer in Sliven has typical daily highs of about 29°C and lows of about 19°C, with a 7% chance of rain on a given day.
Sliven weather in autumnSeptember to November
High 18°CLow 10°CRain 8%
Autumn in Sliven has typical daily highs of about 18°C and lows of about 10°C, with a 8% chance of rain on a given day.
When is the rainy season in Sliven?
Sliven has no sharply defined rainy season: the chance of rain on a given day runs from 4% in August, the driest month, to 13% in May, the wettest.
What time of year is Sliven windiest?
Winds in Sliven are highest in February, averaging 3.4 m/s (12 km/h), and lightest in October, at 2.7 m/s (10 km/h). The prevailing wind is from the N.
What is the average temperature in Sliven year round?
The average temperature in Sliven over the whole year is 14°C. July is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 1°C.