Ustka weather in May

In May, Ustka sees average daytime highs of 14°C and overnight lows near 8°C, with 52 mm of rain across 10.1 wet days and about 15.8 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 16°C by the end. The sky is clear or mostly clear about 37% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 48 min at the start of May to 16 h 30 min by month's end. Set against the rest of the year, May is Ustka's 1st-clearest and 11th-windiest month. For the whole year in context, see Ustka's year-round climate.

Daytime high
14°
5th warmest
Overnight low
8th coldest
Rainfall
52 mm
10.1 wet days
Daylight
15 h 48 min
3:55 AM – 7:43 PM
Cloud cover
54%
1st clearest
Wind
16 km/h
11th windiest
Solar energy
5.49 kWh/m²
Travel score
4.3
out of 10

Ustka is city and urban gmina of Poland.

Density
1,603/km²
people per km²
Founded
1935

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 13°C in the first days to 16°C by the end.

A typical May day in Ustka reaches about 14°C in the afternoon and slips back to 8°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 20°C. Set against its neighbours, May runs about 5°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1136
2136
3136
4137
5137
6137
7137
8137
9137
10147
11147
12148
13148
14148
15148
16148
17148
18158
19159
20159
21159
22159
23159
24159
25169
261610
271610
281610
291610
301610
311610

How May really feels in Ustka

Once humidity and wind are folded in, May 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

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

Ustka weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°5812.24.67.60.0
Feb / -1°4610.64.89.30.0
Mar / 4910.53.211.50.3
Apr10° / 358.40.613.72.3
May14° / 5210.1015.84.3
Jun18° / 12°6410.7016.95.7
Jul20° / 15°8712.9016.46.1
Aug21° / 15°8313.3014.76.0
Sep17° / 12°7812.6012.55.0
Oct12° / 8113.8010.22.9
Nov / 65131.18.20.8
Dec / 6613.64.17.10.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in May, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25347
35347
45248
55248
65248
75347
85347
95248
105347
115248
125347
135248
145347
155347
165347
175446
185446
195446
205545
215545
225545
235545
245545
255545
265545
275545
285545
295545
305545
315545

Chance of precipitation in May

Any precipitation

Ustka gets around 52 mm of rain over 10.1 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 32% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
128
229
330
430
531
632
732
833
933
1034
1134
1235
1335
1435
1535
1634
1734
1834
1933
2033
2133
2233
2332
2432
2532
2632
2731
2831
2931
3031
3131

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
110000
210000
310000
410000
510000
610000
710000
89910
99910
109910
119910
129910
139820
149820
159820
169730
179730
189640
199640
209550
219550
229361
239361
249271
259271
269181
279181
289091
299091
3089101
3189101

Wind in May

Winds average 16 km/h in May.

Across May, daily wind ranges from about 16 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
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 48 min at the start of May to 16 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 102 minutes over May. Sunrise moves from 4:24 AM to 3:34 AM, and sunset from 7:15 PM to 8:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.84:247:15
214.94:227:17
315.04:207:19
415.04:187:21
515.14:167:23
615.24:147:25
715.24:127:26
815.34:107:28
915.44:087:30
1015.44:067:32
1115.54:047:34
1215.64:027:36
1315.64:007:37
1415.73:587:39
1515.73:577:41
1615.83:557:43
1715.93:537:44
1815.93:527:46
1916.03:507:48
2016.03:487:49
2116.13:477:51
2216.13:457:53
2316.23:447:54
2416.23:427:56
2516.33:417:57
2616.33:407:59
2716.43:388:00
2816.43:378:02
2916.53:368:03
3016.53:358:05
3116.53:348:06

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.49 kWh/m².

For context, solar energy here swings from a low near 0.42 kWh/m² to a high of 5.73 kWh/m² in June across the year — May's 5.49 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.4Bright
145.4Bright
155.4Bright
165.5Bright
175.5Bright
185.5Bright
195.6Bright
205.6Bright
215.6Bright
225.7Bright
235.7Bright
245.7Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

Is May a good time to visit Ustka?

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

4.3
Sightseeing
5th-best month of the year
0.2
Beach & pool
5th-best month of the year

May is a reasonable time to visit Ustka for sightseeing.

What to pack for Ustka in May

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

In May, Ustka sees daytime highs around 14°C and nights near 8°C. Worth packing: a warm layer, rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

Sea temperature near Ustka in May

The nearest coast averages about 9°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore 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 Ustka in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ustka 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
Jul5High
Aug5Moderate
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Ustka?

Ustka sits at 54.6°N, 16.9°E, 2 m above sea level, in Poland. The nearest listed city is Słupsk, 17 km away.

LęborkBytówKoszalinBiałogardWejherowoKościerzynaKartuzy

Topography around Ustka

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

Within 3 km, the terrain around Ustka has only modest variations in elevation — a maximum elevation change of 39 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 87 m; within 80 km, significant variations in elevation — a maximum elevation change of 283 m.

The land around Ustka is covered by trees (36%) and water (33%) within 3 km, water (43%) and trees (23%) within 16 km, and water (36%) and trees (35%) within 80 km.

3 km
39 m
16 km
87 m
80 km
283 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Słupsk 17 km · Lębork 57 km · Bytów 61 km · Koszalin 62 km · Białogard 85 km · Wejherowo 89 km · Kościerzyna 89 km · Kartuzy 91 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 Ustka (54.5805°, 16.8619°, elevation 2 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).