Słupsk weather in July

In July, Słupsk sees average daytime highs of 20°C and overnight lows near 15°C, with 91 mm of rain across 13.4 wet days and about 16.4 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 21°C by the end. The sky is clear or mostly clear about 31% of the time in July, and the air most often feels comfortable.

Daylight stretches from about 16 h 54 min at the start of July to 15 h 42 min by month's end. Set against the rest of the year, July is Słupsk's 2nd-clearest and 10th-windiest month. For the whole year in context, see Słupsk's year-round climate.

Daytime high
20°
2nd warmest
Overnight low
15°
11th coldest
Rainfall
91 mm
13.4 wet days
Daylight
16 h 30 min
3:43 AM – 8:12 PM
Cloud cover
57%
2nd clearest
Wind
16 km/h
10th windiest
Solar energy
5.29 kWh/m²
Travel score
6.0
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.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 19°C in the first days to 21°C by the end.

A typical July day in Słupsk reaches about 20°C in the afternoon and slips back to 15°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 25°C. Set against its neighbours, July runs about 3°C warmer than June and on par with August.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
11913
21914
31914
41914
52014
62014
72014
82014
92014
102014
112014
122014
132015
142015
152015
162015
172015
182115
192115
202115
212115
222115
232115
242115
252115
262115
272115
282115
292115
302115
312115

How July really feels in Słupsk

Once humidity and wind are folded in, July 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Słupsk weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°5912.24.77.60.0
Feb / -1°4710.95.19.30.0
Mar / 5110.53.611.50.3
Apr10° / 368.80.813.72.3
May14° / 5610.5015.74.3
Jun18° / 12°6811.5016.95.6
Jul20° / 15°9113.4016.46.0
Aug21° / 15°8513.7014.75.9
Sep17° / 12°7812.3012.55.0
Oct12° / 8013.60.110.22.8
Nov / 6513.21.48.20.7
Dec / 6613.54.57.10.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 21% of July, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25050
35149
45149
55149
65149
75050
85050
95050
105149
114951
125050
135149
145149
155149
165248
175248
185248
195149
205149
215248
225248
235248
245248
255347
265347
275248
285248
295248
305149
315248

Chance of precipitation in July

Any precipitation

Słupsk gets around 91 mm of rain over 13.4 wet days in July, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 43% and peaks near 46% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
141
241
342
442
542
643
743
844
944
1045
1145
1245
1346
1446
1546
1645
1745
1845
1944
2044
2144
2243
2343
2442
2541
2641
2740
2840
2939
3039
3138

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the comfortable band about 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15236111
25137111
34938121
44739131
54640131
64441141
74342151
84142151
94043161
103943171
113844171
123744181
133644191
143545192
153445202
163345212
173245212
183145222
193046223
202946233
212846233
222646244
232546244
242446255
252346255
262247266
272147266
282147266
292047276
302046276
312046286

Wind in July

Winds average 16 km/h in July.

Across July, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 16 h 54 min at the start of July to 15 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over July. Sunrise moves from 3:28 AM to 4:06 AM, and sunset from 8:23 PM to 7:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
116.93:288:23
216.93:298:22
316.93:298:22
416.93:308:21
516.83:318:21
616.83:328:20
716.83:338:20
816.83:348:19
916.73:358:18
1016.73:368:18
1116.73:378:17
1216.63:388:16
1316.63:398:15
1416.63:418:14
1516.53:428:13
1616.53:438:12
1716.43:458:11
1816.43:468:09
1916.33:478:08
2016.33:498:07
2116.33:508:05
2216.23:528:04
2316.23:538:03
2416.13:558:01
2516.13:568:00
2616.03:587:58
2715.94:007:56
2815.94:017:55
2915.84:037:53
3015.84:057:51
3115.74:067:50

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.29 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 — July's 5.29 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in July

Is July a good time to visit Słupsk?

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

6.0
Sightseeing
1st-best month of the year
3.3
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Słupsk for sightseeing.

What to pack for Słupsk in July

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

In July, Słupsk sees daytime highs around 20°C and nights near 15°C. Worth packing: rain gear and sun protection. About 13 days see rain.

rain gearsun protection

Sea temperature near Słupsk in July

The nearest coast averages about 17°C in July — 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.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr5Bracing
May9Bracing
Jun14Bracing
Jul17Cool
Aug19Cool
Sep16Cool
Oct13Bracing
Nov9Bracing
Dec6Bracing

UV index in Słupsk in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 6 — 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 18UV 6Dec 20UV 0
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5Moderate
Jun6High
Jul6High
Aug5Moderate
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
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.

BytówLęborkKoszalinKościerzynaKartuzyWejherowoBiałogard

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
16 km
162 m
80 km
339 m
treesgrasslandcroplandartificial surfaceswater
July 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
Roman Catholic 71%refused to answer 21%no religion 7%

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).