Sliven weather in April

In April, Sliven sees average daytime highs of 15°C and overnight lows near 6°C, with 75 mm of precipitation across 12.3 wet days and about 13.1 hours of daylight. It is the 7th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 17°C by the end. The sky is clear or mostly clear about 25% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 48 min by month's end. Set against the rest of the year, April is Sliven's 7th-clearest and 3rd-windiest month. For the whole year in context, see Sliven's year-round climate.

Daytime high: 15°; 7th warmest
Overnight low: 6°; 6th coldest
Precipitation: 75 mm; 12.3 wet days
Daylight: 13 h 12 min; 5:40 AM – 6:50 PM
Cloud cover: 61%; 7th clearest
Wind: 8 km/h; 3rd windiest
Solar energy: 5.05 kWh/m²
Travel score: 4.2; out of 10

Sliven is city in Sliven municipality, Sliven oblast, Bulgaria.

Air quality: Good; PM10 17.8 µg/m³ · 2019
Density: 432/km²; people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← March Sliven year-round climate May →Best places to visit in April

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 13°C in the first days to 17°C by the end.

A typical April day in Sliven reaches about 15°C in the afternoon and slips back to 6°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 20°C. Set against its neighbours, April runs about 5°C warmer than March and about 5°C cooler than May.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	12	12	13	13	13	13	13	14	14	14	14	14	14	15	15	15	15	15	15	16	16	16	16	16	17	17	17	17	18	18
Avg low (°C)	3	4	4	4	4	4	5	5	5	5	5	5	5	6	6	6	6	6	6	6	6	7	7	7	7	7	7	8	8	8

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	4
3	13	4
4	13	4
5	13	4
6	13	4
7	13	5
8	14	5
9	14	5
10	14	5
11	14	5
12	14	5
13	14	5
14	15	6
15	15	6
16	15	6
17	15	6
18	15	6
19	15	6
20	16	6
21	16	6
22	16	7
23	16	7
24	16	7
25	17	7
26	17	7
27	17	7
28	17	8
29	18	8
30	18	8

How April really feels in Sliven

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Sliven weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	3° / -3°	53	7.7	5.1	9.2	0.0
Feb	6° / -2°	54	8	5.1	10.3	0.3
Mar	10° / 1°	67	10.7	4.3	11.6	2.0
Apr	15° / 6°	75	12.3	0.9	13.1	4.2
May	20° / 10°	106	14.5	0	14.4	5.7
Jun	24° / 14°	100	14	0	15.1	6.3
Jul	27° / 16°	89	11.7	0	14.8	6.7
Aug	27° / 16°	56	8	0	13.7	7.2
Sep	22° / 12°	58	7.8	0	12.3	7.3
Oct	16° / 8°	63	7.8	0.4	10.8	5.4
Nov	10° / 3°	58	7.4	2.1	9.6	2.3
Dec	5° / -1°	63	8.6	4.5	8.9	0.1

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 18% of April, with mostly cloudy or overcast conditions the remaining 56%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	41	42	42	43	43	44	43	43	43	42	42	42	42	41	41	42	42	42	44	44	44	43	44	45	46	46	46	47	47	48
Cloudier (%)	59	58	58	57	57	56	57	57	57	58	58	58	58	59	59	58	58	58	56	56	56	57	56	55	54	54	54	53	53	52

	Clearer (%)	Cloudier (%)
1	41	59
2	42	58
3	42	58
4	43	57
5	43	57
6	44	56
7	43	57
8	43	57
9	43	57
10	42	58
11	42	58
12	42	58
13	42	58
14	41	59
15	41	59
16	42	58
17	42	58
18	42	58
19	44	56
20	44	56
21	44	56
22	43	57
23	44	56
24	45	55
25	46	54
26	46	54
27	46	54
28	47	53
29	47	53
30	48	52

Chance of precipitation in April

Any precipitationSnow

Sliven gets around 75 mm of rain and snow over 12.3 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 41% and peaks near 43% on the wettest days, and about 1 day brings snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	36	37	37	38	38	39	39	40	40	41	41	42	42	42	43	42	42	42	42	42	42	42	42	42	42	42	41	41	42	42
Snow chance (%)	7	7	6	6	6	6	5	5	5	5	5	4	4	4	4	3	3	3	2	2	2	1	1	1	1	0	0	0	0	0

	Rain chance (%)	Snow chance (%)
1	36	7
2	37	7
3	37	6
4	38	6
5	38	6
6	39	6
7	39	5
8	40	5
9	40	5
10	41	5
11	41	5
12	42	4
13	42	4
14	42	4
15	43	4
16	42	3
17	42	3
18	42	3
19	42	2
20	42	2
21	42	2
22	42	1
23	42	1
24	42	1
25	42	1
26	42	0
27	41	0
28	41	0
29	42	0
30	42	0

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	99	99	99	98	98
Comfortable (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	2	2

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	99	1
27	99	1
28	99	1
29	98	2
30	98	2

Wind in April

Winds average 8 km/h in April.

Across April, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	9	calm
2	9	calm
3	9	calm
4	9	calm
5	9	calm
6	9	calm
7	9	calm
8	9	calm
9	9	calm
10	9	calm
11	9	calm
12	9	calm
13	9	calm
14	9	calm
15	9	calm
16	8	calm
17	8	calm
18	8	calm
19	8	calm
20	8	calm
21	8	calm
22	8	calm
23	8	calm
24	8	calm
25	8	calm
26	8	calm
27	8	calm
28	8	calm
29	8	calm
30	8	calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over April. Sunrise moves from 6:06 AM to 5:18 AM, and sunset from 6:32 PM to 7:06 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.4	12.5	12.5	12.6	12.6	12.7	12.7	12.8	12.8	12.9	12.9	13.0	13.0	13.1	13.1	13.2	13.2	13.3	13.3	13.3	13.4	13.4	13.5	13.5	13.6	13.6	13.7	13.7	13.8	13.8
Sunrise (AM)	6:06	6:05	6:03	6:01	5:59	5:57	5:56	5:54	5:52	5:50	5:49	5:47	5:45	5:43	5:42	5:40	5:38	5:37	5:35	5:33	5:32	5:30	5:29	5:27	5:26	5:24	5:23	5:21	5:20	5:18
Sunset (PM)	6:32	6:34	6:35	6:36	6:37	6:38	6:39	6:40	6:42	6:43	6:44	6:45	6:46	6:47	6:49	6:50	6:51	6:52	6:53	6:54	6:56	6:57	6:58	6:59	7:00	7:01	7:02	7:04	7:05	7:06

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.4	6:06	6:32
2	12.5	6:05	6:34
3	12.5	6:03	6:35
4	12.6	6:01	6:36
5	12.6	5:59	6:37
6	12.7	5:57	6:38
7	12.7	5:56	6:39
8	12.8	5:54	6:40
9	12.8	5:52	6:42
10	12.9	5:50	6:43
11	12.9	5:49	6:44
12	13.0	5:47	6:45
13	13.0	5:45	6:46
14	13.1	5:43	6:47
15	13.1	5:42	6:49
16	13.2	5:40	6:50
17	13.2	5:38	6:51
18	13.3	5:37	6:52
19	13.3	5:35	6:53
20	13.3	5:33	6:54
21	13.4	5:32	6:56
22	13.4	5:30	6:57
23	13.5	5:29	6:58
24	13.5	5:27	6:59
25	13.6	5:26	7:00
26	13.6	5:24	7:01
27	13.7	5:23	7:02
28	13.7	5:21	7:04
29	13.8	5:20	7:05
30	13.8	5:18	7:06

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.05 kWh/m².

For context, solar energy here swings from a low near 1.43 kWh/m² to a high of 6.45 kWh/m² in June across the year — April's 5.05 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	4.4	4.5	4.5	4.6	4.6	4.6	4.7	4.7	4.8	4.8	4.8	4.9	4.9	4.9	5.0	5.0	5.1	5.1	5.2	5.2	5.3	5.3	5.3	5.4	5.4	5.5	5.5	5.6	5.6	5.6
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.4	Bright
2	4.5	Bright
3	4.5	Bright
4	4.6	Bright
5	4.6	Bright
6	4.6	Bright
7	4.7	Bright
8	4.7	Bright
9	4.8	Bright
10	4.8	Bright
11	4.8	Bright
12	4.9	Bright
13	4.9	Bright
14	4.9	Bright
15	5.0	Bright
16	5.0	Bright
17	5.1	Bright
18	5.1	Bright
19	5.2	Bright
20	5.2	Bright
21	5.3	Bright
22	5.3	Bright
23	5.3	Bright
24	5.4	Bright
25	5.4	Bright
26	5.5	Bright
27	5.5	Bright
28	5.6	Bright
29	5.6	Bright
30	5.6	Bright

Planning a trip in April

Is April a good time to visit Sliven?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.2

Sightseeing

7th-best month of the year

0.4

Beach & pool

7th-best month of the year

April is a reasonable time to visit Sliven for sightseeing.

What to pack for Sliven in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Sliven sees daytime highs around 15°C and nights near 6°C. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

UV index in Sliven in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sliven peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	2	3	8	6	8	9	8	6	4	2	1
Level	Low	Moderate	Moderate	Very high	High	Very high	Very high	Very high	High	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	2	Moderate
Mar	3	Moderate
Apr	8	Very high
May	6	High
Jun	8	Very high
Jul	9	Very high
Aug	8	Very high
Sep	6	High
Oct	4	Moderate
Nov	2	Low
Dec	1	Low

Air quality in Sliven in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Sliven is worst in March — around 16 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (September, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	13	14	16	15	13	13	12	11	10	10	11	11
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	13	Moderate
Feb	14	Moderate
Mar	16	Moderate
Apr	15	Moderate
May	13	Moderate
Jun	13	Moderate
Jul	12	Good
Aug	11	Good
Sep	10	Good
Oct	10	Good
Nov	11	Good
Dec	11	Good

Location & terrain

Where is Sliven?

Sliven sits at 42.7°N, 26.3°E, 281 m above sea level, in Bulgaria. The nearest listed city is Yambol, 27 km away.

Topography around Sliven

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sliven.

Within 3 km, the terrain around Sliven has significant variations in elevation — a maximum elevation change of 598 m around an average of 351 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,041 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,510 m.

The land around Sliven is covered by trees (43%), artificial surfaces (33%) and grassland (21%) within 3 km, trees (52%) and cropland (29%) within 16 km, and trees (42%) and cropland (40%) within 80 km.

3 km

598 m

trees 43%

16 km

1,041 m

trees 52%

80 km

1,510 m

trees 42%

treesgrasslandcroplandartificial surfaceswater

← March Sliven year-round climate May →Best places to visit in April

April weather nearby: Yambol 27 km · Nova Zagora 34 km · Karnobat 54 km · Stara Zagora 63 km · Targovishte 66 km · Gorna Oryahovitsa 71 km · Veliko Tarnovo 72 km · Popovo 74 km

Bulgaria travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / F; 230 V · 50 Hz
Prices: ≈ 23% of US; price level, 2025
GDP per capita: $20,328; 2025
Happiness: 5.7 / 10; World Happiness, 2025
Safe drinking water: 96%; of population, 2024
Homicide rate: 1.1; per 100k, 2023
Road deaths: 9.2; per 100k/yr, 2019
Income group: High; World Bank
English: High; EF EPI 594
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sliven (42.6861°, 26.3256°, elevation 281 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	4
3	13	4
4	13	4
5	13	4
6	13	4
7	13	5
8	14	5
9	14	5
10	14	5
11	14	5
12	14	5
13	14	5
14	15	6
15	15	6
16	15	6
17	15	6
18	15	6
19	15	6
20	16	6
21	16	6
22	16	7
23	16	7
24	16	7
25	17	7
26	17	7
27	17	7
28	17	8
29	18	8
30	18	8

	Clearer (%)	Cloudier (%)
1	41	59
2	42	58
3	42	58
4	43	57
5	43	57
6	44	56
7	43	57
8	43	57
9	43	57
10	42	58
11	42	58
12	42	58
13	42	58
14	41	59
15	41	59
16	42	58
17	42	58
18	42	58
19	44	56
20	44	56
21	44	56
22	43	57
23	44	56
24	45	55
25	46	54
26	46	54
27	46	54
28	47	53
29	47	53
30	48	52

	Rain chance (%)	Snow chance (%)
1	36	7
2	37	7
3	37	6
4	38	6
5	38	6
6	39	6
7	39	5
8	40	5
9	40	5
10	41	5
11	41	5
12	42	4
13	42	4
14	42	4
15	43	4
16	42	3
17	42	3
18	42	3
19	42	2
20	42	2
21	42	2
22	42	1
23	42	1
24	42	1
25	42	1
26	42	0
27	41	0
28	41	0
29	42	0
30	42	0

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	99	1
27	99	1
28	99	1
29	98	2
30	98	2

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	4
3	13	4
4	13	4
5	13	4
6	13	4
7	13	5
8	14	5
9	14	5
10	14	5
11	14	5
12	14	5
13	14	5
14	15	6
15	15	6
16	15	6
17	15	6
18	15	6
19	15	6
20	16	6
21	16	6
22	16	7
23	16	7
24	16	7
25	17	7
26	17	7
27	17	7
28	17	8
29	18	8
30	18	8

	Clearer (%)	Cloudier (%)
1	41	59
2	42	58
3	42	58
4	43	57
5	43	57
6	44	56
7	43	57
8	43	57
9	43	57
10	42	58
11	42	58
12	42	58
13	42	58
14	41	59
15	41	59
16	42	58
17	42	58
18	42	58
19	44	56
20	44	56
21	44	56
22	43	57
23	44	56
24	45	55
25	46	54
26	46	54
27	46	54
28	47	53
29	47	53
30	48	52

	Rain chance (%)	Snow chance (%)
1	36	7
2	37	7
3	37	6
4	38	6
5	38	6
6	39	6
7	39	5
8	40	5
9	40	5
10	41	5
11	41	5
12	42	4
13	42	4
14	42	4
15	43	4
16	42	3
17	42	3
18	42	3
19	42	2
20	42	2
21	42	2
22	42	1
23	42	1
24	42	1
25	42	1
26	42	0
27	41	0
28	41	0
29	42	0
30	42	0

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	99	1
27	99	1
28	99	1
29	98	2
30	98	2

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	4
3	13	4
4	13	4
5	13	4
6	13	4
7	13	5
8	14	5
9	14	5
10	14	5
11	14	5
12	14	5
13	14	5
14	15	6
15	15	6
16	15	6
17	15	6
18	15	6
19	15	6
20	16	6
21	16	6
22	16	7
23	16	7
24	16	7
25	17	7
26	17	7
27	17	7
28	17	8
29	18	8
30	18	8

	Clearer (%)	Cloudier (%)
1	41	59
2	42	58
3	42	58
4	43	57
5	43	57
6	44	56
7	43	57
8	43	57
9	43	57
10	42	58
11	42	58
12	42	58
13	42	58
14	41	59
15	41	59
16	42	58
17	42	58
18	42	58
19	44	56
20	44	56
21	44	56
22	43	57
23	44	56
24	45	55
25	46	54
26	46	54
27	46	54
28	47	53
29	47	53
30	48	52

	Rain chance (%)	Snow chance (%)
1	36	7
2	37	7
3	37	6
4	38	6
5	38	6
6	39	6
7	39	5
8	40	5
9	40	5
10	41	5
11	41	5
12	42	4
13	42	4
14	42	4
15	43	4
16	42	3
17	42	3
18	42	3
19	42	2
20	42	2
21	42	2
22	42	1
23	42	1
24	42	1
25	42	1
26	42	0
27	41	0
28	41	0
29	42	0
30	42	0

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	99	1
27	99	1
28	99	1
29	98	2
30	98	2