Słupsk weather in April

In April, Słupsk sees average daytime highs of 10°C and overnight lows near 4°C, with 36 mm of precipitation across 8.8 wet days and about 13.7 hours of daylight. It is the 7th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 8°C in the first days to 12°C by the end. The sky is clear or mostly clear about 33% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 42 min at the start of April to 14 h 48 min by month's end. Set against the rest of the year, April is Słupsk's 3rd-clearest and 8th-windiest month. For the whole year in context, see Słupsk's year-round climate.

Daytime high: 10°; 7th warmest
Overnight low: 4°; 6th coldest
Precipitation: 36 mm; 8.8 wet days
Daylight: 13 h 48 min; 4:59 AM – 6:45 PM
Cloud cover: 57%; 3rd clearest
Wind: 17 km/h; 8th windiest
Solar energy: 4.28 kWh/m²
Travel score: 2.3; out of 10

Słupsk is city in the Pomeranian Voivodeship, in the northern part of Poland.

Density: 1,870/km²; people per km²
Founded: 1000

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

← March Słupsk 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 8°C in the first days to 12°C by the end.

A typical April day in Słupsk reaches about 10°C in the afternoon and slips back to 4°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 5°C and 15°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)	8	8	8	8	8	8	8	9	9	9	9	9	9	9	10	10	10	10	10	11	11	11	11	12	12	12	12	12	13	13
Avg low (°C)	2	2	2	2	2	3	3	3	3	3	3	3	3	3	4	4	4	4	4	4	4	5	5	5	5	5	5	6	6	6

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

How April really feels in Słupsk

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 17 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

The story in April is cold — wind chill drags the overnight "feels like" below the raw low.

Słupsk weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	2° / -1°	59	12.2	4.7	7.6	0.0
Feb	3° / -1°	47	10.9	5.1	9.3	0.0
Mar	5° / 1°	51	10.5	3.6	11.5	0.3
Apr	10° / 4°	36	8.8	0.8	13.7	2.3
May	14° / 8°	56	10.5	0	15.7	4.3
Jun	18° / 12°	68	11.5	0	16.9	5.6
Jul	20° / 15°	91	13.4	0	16.4	6.0
Aug	21° / 15°	85	13.7	0	14.7	5.9
Sep	17° / 12°	78	12.3	0	12.5	5.0
Oct	12° / 8°	80	13.6	0.1	10.2	2.8
Nov	7° / 4°	65	13.2	1.4	8.2	0.7
Dec	4° / 0°	66	13.5	4.5	7.1	0.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 16% of April, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to open up as the month goes on.

	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 (%)	43	42	42	43	43	43	45	45	45	45	47	47	47	49	50	51	50	51	52	52	53	53	53	53	53	53	53	53	52	53
Cloudier (%)	57	58	58	57	57	57	55	55	55	55	53	53	53	51	50	49	50	49	48	48	47	47	47	47	47	47	47	47	48	47

	Clearer (%)	Cloudier (%)
1	43	57
2	42	58
3	42	58
4	43	57
5	43	57
6	43	57
7	45	55
8	45	55
9	45	55
10	45	55
11	47	53
12	47	53
13	47	53
14	49	51
15	50	50
16	51	49
17	50	50
18	51	49
19	52	48
20	52	48
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	53	47
28	53	47
29	52	48
30	53	47

Chance of precipitation in April

Any precipitationSnow

Słupsk gets around 36 mm of rain and snow over 8.8 wet days in April, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 29% and peaks near 32% 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 (%)	32	32	32	32	32	32	32	32	31	31	31	30	30	29	29	28	28	28	27	27	27	27	27	27	27	27	27	28	28	29
Snow chance (%)	8	7	7	7	6	6	5	5	5	4	4	4	3	3	3	2	2	2	2	1	1	1	1	0	0	0	0	0	0	0

	Rain chance (%)	Snow chance (%)
1	32	8
2	32	7
3	32	7
4	32	7
5	32	6
6	32	6
7	32	5
8	32	5
9	31	5
10	31	4
11	31	4
12	30	4
13	30	3
14	29	3
15	29	3
16	28	2
17	28	2
18	28	2
19	27	2
20	27	1
21	27	1
22	27	1
23	27	1
24	27	0
25	27	0
26	27	0
27	27	0
28	28	0
29	28	0
30	29	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	100	100	100	100	100

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

Wind in April

Winds average 17 km/h in April.

Across April, daily wind ranges from about 15 km/h on the calmest days to 17 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)	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	16	16	16	16	16	16	16	16	16	16	16	16	15	15
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

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

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 42 min at the start of April to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 126 minutes over April. Sunrise moves from 5:37 AM to 4:26 AM, and sunset from 6:16 PM to 7:12 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)	12.7	12.7	12.8	12.9	13.0	13.0	13.1	13.2	13.3	13.3	13.4	13.5	13.6	13.6	13.7	13.8	13.8	13.9	14.0	14.1	14.1	14.2	14.3	14.3	14.4	14.5	14.6	14.6	14.7	14.8
Sunrise (AM)	5:37	5:34	5:32	5:29	5:27	5:24	5:21	5:19	5:16	5:14	5:11	5:09	5:06	5:04	5:01	4:59	4:57	4:54	4:52	4:49	4:47	4:45	4:42	4:40	4:38	4:35	4:33	4:31	4:29	4:26
Sunset (PM)	6:16	6:18	6:20	6:22	6:24	6:26	6:28	6:30	6:32	6:34	6:36	6:38	6:39	6:41	6:43	6:45	6:47	6:49	6:51	6:53	6:55	6:57	6:59	7:01	7:03	7:04	7:06	7:08	7:10	7:12

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.7	5:37	6:16
2	12.7	5:34	6:18
3	12.8	5:32	6:20
4	12.9	5:29	6:22
5	13.0	5:27	6:24
6	13.0	5:24	6:26
7	13.1	5:21	6:28
8	13.2	5:19	6:30
9	13.3	5:16	6:32
10	13.3	5:14	6:34
11	13.4	5:11	6:36
12	13.5	5:09	6:38
13	13.6	5:06	6:39
14	13.6	5:04	6:41
15	13.7	5:01	6:43
16	13.8	4:59	6:45
17	13.8	4:57	6:47
18	13.9	4:54	6:49
19	14.0	4:52	6:51
20	14.1	4:49	6:53
21	14.1	4:47	6:55
22	14.2	4:45	6:57
23	14.3	4:42	6:59
24	14.3	4:40	7:01
25	14.4	4:38	7:03
26	14.5	4:35	7:04
27	14.6	4:33	7:06
28	14.6	4:31	7:08
29	14.7	4:29	7:10
30	14.8	4:26	7:12

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.28 kWh/m².

For context, solar energy here swings from a low near 0.41 kWh/m² to a high of 5.63 kWh/m² in June across the year — April's 4.28 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)	3.5	3.5	3.5	3.6	3.6	3.7	3.8	3.8	3.9	3.9	4.0	4.0	4.1	4.2	4.2	4.3	4.4	4.5	4.5	4.6	4.6	4.7	4.7	4.8	4.8	4.9	4.9	4.9	5.0	5.0
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	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	3.5	Moderate
2	3.5	Moderate
3	3.5	Moderate
4	3.6	Moderate
5	3.6	Moderate
6	3.7	Moderate
7	3.8	Moderate
8	3.8	Moderate
9	3.9	Moderate
10	3.9	Moderate
11	4.0	Moderate
12	4.0	Bright
13	4.1	Bright
14	4.2	Bright
15	4.2	Bright
16	4.3	Bright
17	4.4	Bright
18	4.5	Bright
19	4.5	Bright
20	4.6	Bright
21	4.6	Bright
22	4.7	Bright
23	4.7	Bright
24	4.8	Bright
25	4.8	Bright
26	4.9	Bright
27	4.9	Bright
28	4.9	Bright
29	5.0	Bright
30	5.0	Bright

Planning a trip in April

Is April a good time to visit Słupsk?

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

2.3

Sightseeing

7th-best month of the year

0.0

Beach & pool

7th-best month of the year

April is a weaker month for outdoor sightseeing in Słupsk.

What to pack for Słupsk in April

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

In April, Słupsk sees daytime highs around 10°C and nights near 4°C. Pack a warm layer. Worth having: rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Słupsk in April

The nearest coast averages about 5°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 20 km away) is warmest in August at about 19°C and coldest in February near 3°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	4	3	3	5	9	14	17	19	16	13	9	6
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	4	Bracing
Feb	3	Bracing
Mar	3	Bracing
Apr	5	Bracing
May	9	Bracing
Jun	14	Bracing
Jul	17	Cool
Aug	19	Cool
Sep	16	Cool
Oct	13	Bracing
Nov	9	Bracing
Dec	6	Bracing

UV index in Słupsk in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Słupsk peaks around June 18 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 20 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	1	3	4	5	6	6	5	4	2	1	0
Level	Low	Low	Moderate	Moderate	Moderate	High	High	Moderate	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	3	Moderate
Apr	4	Moderate
May	5	Moderate
Jun	6	High
Jul	6	High
Aug	5	Moderate
Sep	4	Moderate
Oct	2	Low
Nov	1	Low
Dec	0	Low

Location & terrain

Where is Słupsk?

Słupsk sits at 54.5°N, 17.0°E, 18 m above sea level, in Poland. The nearest listed city is Ustka, 17 km away.

Topography around Słupsk

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

Within 3 km, the terrain around Słupsk has only modest variations in elevation — a maximum elevation change of 78 m around an average of 42 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 162 m; within 80 km, significant variations in elevation — a maximum elevation change of 339 m.

The land around Słupsk is covered by trees (45%) and artificial surfaces (33%) within 3 km, trees (40%) and cropland (39%) within 16 km, and trees (39%) and water (30%) within 80 km.

3 km

78 m

trees 45%

16 km

162 m

trees 40%

80 km

339 m

trees 39%

treesgrasslandcroplandartificial surfaceswater

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

April weather nearby: Ustka 17 km · Bytów 44 km · Lębork 47 km · Koszalin 63 km · Kościerzyna 73 km · Kartuzy 77 km · Wejherowo 79 km · Białogard 85 km

Poland travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / E; 230 V · 50 Hz
Prices: ≈ 52% of US; price level, 2025
GDP per capita: $28,420; 2025
Happiness: 6.8 / 10; World Happiness, 2025
Safe drinking water: 89%; of population, 2024
Homicide rate: 0.8; per 100k, 2023
Road deaths: 9.4; per 100k/yr, 2019
Income group: High; World Bank
English: Very high; EF EPI 600
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 Słupsk (54.4641°, 17.0287°, elevation 18 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. 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	8	2
2	8	2
3	8	2
4	8	2
5	8	2
6	8	3
7	8	3
8	9	3
9	9	3
10	9	3
11	9	3
12	9	3
13	9	3
14	9	3
15	10	4
16	10	4
17	10	4
18	10	4
19	10	4
20	11	4
21	11	4
22	11	5
23	11	5
24	12	5
25	12	5
26	12	5
27	12	5
28	12	6
29	13	6
30	13	6

	Clearer (%)	Cloudier (%)
1	43	57
2	42	58
3	42	58
4	43	57
5	43	57
6	43	57
7	45	55
8	45	55
9	45	55
10	45	55
11	47	53
12	47	53
13	47	53
14	49	51
15	50	50
16	51	49
17	50	50
18	51	49
19	52	48
20	52	48
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	53	47
28	53	47
29	52	48
30	53	47

	Rain chance (%)	Snow chance (%)
1	32	8
2	32	7
3	32	7
4	32	7
5	32	6
6	32	6
7	32	5
8	32	5
9	31	5
10	31	4
11	31	4
12	30	4
13	30	3
14	29	3
15	29	3
16	28	2
17	28	2
18	28	2
19	27	2
20	27	1
21	27	1
22	27	1
23	27	1
24	27	0
25	27	0
26	27	0
27	27	0
28	28	0
29	28	0
30	29	0

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

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

	Clearer (%)	Cloudier (%)
1	43	57
2	42	58
3	42	58
4	43	57
5	43	57
6	43	57
7	45	55
8	45	55
9	45	55
10	45	55
11	47	53
12	47	53
13	47	53
14	49	51
15	50	50
16	51	49
17	50	50
18	51	49
19	52	48
20	52	48
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	53	47
28	53	47
29	52	48
30	53	47

	Rain chance (%)	Snow chance (%)
1	32	8
2	32	7
3	32	7
4	32	7
5	32	6
6	32	6
7	32	5
8	32	5
9	31	5
10	31	4
11	31	4
12	30	4
13	30	3
14	29	3
15	29	3
16	28	2
17	28	2
18	28	2
19	27	2
20	27	1
21	27	1
22	27	1
23	27	1
24	27	0
25	27	0
26	27	0
27	27	0
28	28	0
29	28	0
30	29	0

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

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

	Clearer (%)	Cloudier (%)
1	43	57
2	42	58
3	42	58
4	43	57
5	43	57
6	43	57
7	45	55
8	45	55
9	45	55
10	45	55
11	47	53
12	47	53
13	47	53
14	49	51
15	50	50
16	51	49
17	50	50
18	51	49
19	52	48
20	52	48
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	53	47
28	53	47
29	52	48
30	53	47

	Rain chance (%)	Snow chance (%)
1	32	8
2	32	7
3	32	7
4	32	7
5	32	6
6	32	6
7	32	5
8	32	5
9	31	5
10	31	4
11	31	4
12	30	4
13	30	3
14	29	3
15	29	3
16	28	2
17	28	2
18	28	2
19	27	2
20	27	1
21	27	1
22	27	1
23	27	1
24	27	0
25	27	0
26	27	0
27	27	0
28	28	0
29	28	0
30	29	0

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