Ustka weather in December

In December, Ustka sees average daytime highs of 4°C and overnight lows near 1°C, with 66 mm of precipitation across 13.6 wet days and about 7.1 hours of daylight. It is the 10th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 5°C in the first days to 3°C by the end. The sky is clear or mostly clear about 9% of the time in December, and the air most often feels dry.

Daylight stretches from about 7 h 24 min at the start of December to 7 h 06 min by month's end. Set against the rest of the year, December is Ustka's 12th-clearest and 2nd-windiest month. For the whole year in context, see Ustka's year-round climate.

Daytime high
10th warmest
Overnight low
3rd coldest
Precipitation
66 mm
13.6 wet days
Daylight
7 hours
8:18 AM – 3:20 PM
Cloud cover
80%
12th clearest
Wind
22 km/h
2nd windiest
Solar energy
0.42 kWh/m²
Travel score
0.0
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 December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 5°C in the first days to 3°C by the end.

A typical December day in Ustka reaches about 4°C in the afternoon and slips back to 1°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between -1°C and 8°C. Set against its neighbours, December runs about 3°C cooler than November and about 1°C warmer than January.

-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
152
252
352
452
552
652
742
842
941
1041
1141
1241
1341
1441
1541
1641
1741
1841
1940
2030
2130
2230
2330
2430
2530
2630
2730
2830
2930
3030
3130

How December really feels in Ustka

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 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
31
wind chill below the day's low

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

Ustka weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 5th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 82%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11783
21783
31684
41684
51684
61684
71684
81684
91684
101684
111684
121684
131684
141783
151783
161783
171783
181882
191882
201882
211882
221882
232080
242080
252080
262179
272278
282278
292278
302179
312179

Chance of precipitation in December

Any precipitationSnow

Ustka gets around 66 mm of rain and snow over 13.6 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 44% and peaks near 46% on the wettest days, and about 4 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1429
2429
34310
44410
54410
64510
74511
84611
94611
104611
114611
124612
134612
144612
154513
164513
174513
184514
194514
204415
214415
224315
234315
244316
254316
264216
274216
284216
294215
304215
314214

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

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

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 22 km/h in December.

Across December, daily wind ranges from about 21 km/h on the calmest days to 23 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
121breezy
222breezy
322breezy
422breezy
522breezy
622breezy
722breezy
822breezy
922breezy
1022breezy
1122breezy
1222breezy
1322breezy
1422breezy
1522breezy
1622breezy
1722breezy
1822breezy
1922breezy
2022breezy
2122breezy
2222breezy
2322breezy
2422breezy
2522breezy
2622breezy
2722breezy
2823breezy
2923breezy
3023breezy
3123breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 7 h 24 min at the start of December to 7 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over December. Sunrise moves from 8:00 AM to 8:24 AM, and sunset from 3:24 PM to 3:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
17.48:003:24
27.48:023:24
37.38:033:23
47.38:053:22
57.38:063:22
67.28:073:21
77.28:093:21
87.28:103:21
97.28:113:20
107.18:123:20
117.18:133:20
127.18:143:20
137.18:153:19
147.18:163:19
157.08:173:19
167.08:183:20
177.08:193:20
187.08:193:20
197.08:203:20
207.08:213:20
217.08:213:21
227.08:223:21
237.08:223:22
247.08:233:22
257.08:233:23
267.08:233:24
277.08:233:24
287.08:243:25
297.08:243:26
307.18:243:27
317.18:243:28

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.42 kWh/m² — the year's lowest.

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 — December's 0.42 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.5Dim
20.5Dim
30.5Dim
40.5Dim
50.5Dim
60.5Dim
70.5Dim
80.4Dim
90.4Dim
100.4Dim
110.4Dim
120.4Dim
130.4Dim
140.4Dim
150.4Dim
160.4Dim
170.4Dim
180.4Dim
190.4Dim
200.4Dim
210.4Dim
220.4Dim
230.4Dim
240.4Dim
250.4Dim
260.4Dim
270.4Dim
280.4Dim
290.4Dim
300.4Dim
310.4Dim
Planning a trip in December

Is December a good time to visit Ustka?

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

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Ustka.

What to pack for Ustka in December

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

In December, Ustka sees daytime highs around 4°C and nights near 1°C. Pack a warm layer. Worth having: a heavy coat, rain gear and a windbreaker. About 14 days see rain.

a warm layera heavy coatrain geara windbreaker

Sea temperature near Ustka in December

The nearest coast averages about 6°C in December — 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 December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 0. 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
December 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).