Kościerzyna weather in May

In May, Kościerzyna sees average daytime highs of 17°C and overnight lows near 7°C, with 63 mm of rain across 11.9 wet days and about 15.7 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 15°C in the first days to 18°C by the end. The sky is clear or mostly clear about 27% 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 Kościerzyna's 2nd-clearest and 10th-windiest month. For the whole year in context, see Kościerzyna's year-round climate.

Daytime high
17°
5th warmest
Overnight low
8th coldest
Rainfall
63 mm
11.9 wet days
Daylight
15 h 42 min
3:53 AM – 7:36 PM
Cloud cover
61%
2nd clearest
Wind
14 km/h
10th windiest
Solar energy
5.18 kWh/m²
Travel score
5.1
out of 10

Kościerzyna is city and urban gmina of Poland.

Air quality
Elevated
PM2.5 22.8 µg/m³ · 2018
Density
1,474/km²
people per km²
Founded
1250

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 15°C in the first days to 18°C by the end.

A typical May day in Kościerzyna reaches about 17°C in the afternoon and slips back to 7°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 23°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)
1155
2155
3155
4156
5156
6166
7166
8166
9166
10166
11166
12167
13167
14167
15167
16177
17177
18177
19177
20178
21178
22178
23178
24188
25188
26188
27188
28189
29189
30189
31199

How May really feels in Kościerzyna

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.

Kościerzyna weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°4310.15.87.70.0
Feb / -3°348.75.29.40.0
Mar / -1°42103.711.50.4
Apr12° / 379.41.113.73.0
May17° / 6311.9015.75.1
Jun19° / 11°7012.6016.85.7
Jul22° / 13°8813.2016.46.1
Aug22° / 13°7012.5014.66.2
Sep17° / 539.2012.55.3
Oct11° / 4610.10.210.22.8
Nov / 378.92.18.30.4
Dec / -2°4510.357.20.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34357
44357
54357
64357
74357
84258
94159
104159
114060
124159
134159
144159
154159
164258
174159
184258
194258
204357
214357
224456
234456
244456
254456
264555
274555
284555
294555
304555
314555

Chance of precipitation in May

Any precipitation

Kościerzyna gets around 63 mm of rain over 11.9 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 38% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
133
234
335
436
536
637
738
838
939
1039
1140
1240
1340
1440
1540
1640
1740
1840
1939
2039
2139
2238
2338
2438
2538
2637
2737
2837
2937
3037
3137

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 94% 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
49910
59910
69910
79910
89910
99910
109820
119820
129730
139730
149640
159640
169550
179550
189460
199361
209271
219271
229181
239181
249091
2588102
2688102
2787112
2887112
2986122
3086122
3185123

Wind in May

Winds average 14 km/h in May.

Across May, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light 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 4:21 AM to 3:32 AM, and sunset from 7:09 PM to 7:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.84:217:09
214.94:197:11
314.94:177:13
415.04:157:15
515.14:137:17
615.14:117:18
715.24:097:20
815.24:077:22
915.34:057:24
1015.44:037:26
1115.44:017:27
1215.54:007:29
1315.63:587:31
1415.63:567:33
1515.73:547:34
1615.73:537:36
1715.83:517:38
1815.83:497:39
1915.93:487:41
2015.93:467:43
2116.03:457:44
2216.03:437:46
2316.13:427:48
2416.13:407:49
2516.23:397:51
2616.23:387:52
2716.33:367:54
2816.33:357:55
2916.43:347:56
3016.43:337:58
3116.53:327:59

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.18 kWh/m².

For context, solar energy here swings from a low near 0.43 kWh/m² to a high of 5.31 kWh/m² in June across the year — May's 5.18 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.3Bright
225.3Bright
235.3Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Is May a good time to visit Kościerzyna?

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

5.1
Sightseeing
5th-best month of the year
1.0
Beach & pool
5th-best month of the year

May is a reasonable time to visit Kościerzyna for sightseeing.

What to pack for Kościerzyna in May

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

In May, Kościerzyna sees daytime highs around 17°C and nights near 7°C. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

Sea temperature near Kościerzyna in May

The nearest coast averages about 10°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 65 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
May10Bracing
Jun14Bracing
Jul18Cool
Aug19Cool
Sep17Cool
Oct13Bracing
Nov9Bracing
Dec6Bracing

UV index in Kościerzyna 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 Kościerzyna 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
May5High
Jun6High
Jul6High
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low

Air quality in Kościerzyna in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Kościerzyna is worst in April — around 29 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 14 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Kościerzyna's WHO annual average of 22.8 µg/m³.

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1229 µg/m³Dec 1515 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb21Moderate
Mar28Moderate
Apr29Moderate
May26Moderate
Jun28Moderate
Jul26Moderate
Aug25Moderate
Sep22Moderate
Oct19Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Kościerzyna?

Kościerzyna sits at 54.1°N, 18.0°E, 162 m above sea level, in Poland. The nearest listed city is Kartuzy, 27 km away.

Starogard GdańskiPruszcz GdańskiUjeścisko-ŁostowiceOsowaPiecki-MigowoOrunia Górna-Gdańsk Południe

Topography around Kościerzyna

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

Within 3 km, the terrain around Kościerzyna has only modest variations in elevation — a maximum elevation change of 74 m around an average of 177 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 215 m; within 80 km, significant variations in elevation — a maximum elevation change of 339 m.

The land around Kościerzyna is covered by trees (45%) and grassland (24%) within 3 km, trees (53%) and cropland (23%) within 16 km, and trees (45%) and cropland (32%) within 80 km.

3 km
74 m
16 km
215 m
80 km
339 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Kartuzy 27 km · Bytów 32 km · Starogard Gdański 40 km · Pruszcz Gdański 45 km · Ujeścisko-Łostowice 46 km · Osowa 47 km · Piecki-Migowo 47 km · Orunia Górna-Gdańsk Południe 47 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 Kościerzyna (54.1223°, 17.9812°, elevation 162 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. 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).