Wejherowo weather in January

In January, Wejherowo sees average daytime highs of 1°C and overnight lows near -3°C, with 43 mm of precipitation across 10.9 wet days and about 7.6 hours of daylight. It is the 12th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 1°C through the month. The sky is clear or mostly clear about 11% of the time in January, and the air most often feels dry.

Daylight stretches from about 7 h 06 min at the start of January to 8 h 18 min by month's end. Set against the rest of the year, January is Wejherowo's 10th-clearest and 1st-windiest month. For the whole year in context, see Wejherowo's year-round climate.

Daytime high
12th warmest
Overnight low
-3°
2nd coldest
Precipitation
43 mm
10.9 wet days
Daylight
7 h 36 min
8:09 AM – 3:43 PM
Cloud cover
78%
10th clearest
Wind
19 km/h
1st windiest
Solar energy
0.63 kWh/m²
Travel score
0.0
out of 10

Wejherowo is city and urban gmina of Poland.

Air quality
Good
PM10 29.1 µg/m³ · 2018
Density
1,825/km²
people per km²
Founded
1643

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 1°C through the month.

A typical January day in Wejherowo reaches about 1°C in the afternoon and slips back to -3°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between -5°C and 6°C. Set against its neighbours, January runs about 1°C cooler than December and about 1°C cooler than February.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
11-2
21-2
31-2
41-2
51-2
61-2
71-2
81-2
91-2
101-2
111-2
121-2
131-2
141-2
151-2
161-3
171-3
181-3
191-3
201-3
211-3
221-3
231-3
241-3
251-3
261-3
271-3
281-3
291-3
301-3
311-3

How January really feels in Wejherowo

Once humidity and wind are folded in, January 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 January is cold — wind chill drags the overnight "feels like" below the raw low.

Wejherowo weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°4310.967.60.0
Feb / -3°369.65.99.30.0
Mar / -1°4410.94.611.50.4
Apr11° / 439.81.313.72.8
May16° / 6511.5015.84.9
Jun19° / 11°7713016.95.6
Jul21° / 13°9713.9016.46.0
Aug21° / 13°8313014.76.1
Sep17° / 10°5911012.55.2
Oct12° / 5311.20.310.22.9
Nov / 419.92.18.20.5
Dec / -1°4510.74.77.10.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 10% of January, with mostly cloudy or overcast conditions the remaining 79%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12080
21981
31981
41981
51981
61981
71981
81981
91981
101981
111981
121981
132080
142080
152080
161981
172080
182080
192080
202179
212179
222278
232278
242278
252377
262377
272377
282377
292377
302476
312476

Chance of precipitation in January

Any precipitationSnow

Wejherowo gets around 43 mm of rain and snow over 10.9 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 34% and peaks near 37% on the wettest days, and about 6 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13617
23617
33617
43717
53717
63717
73717
83717
93717
103618
113618
123518
133419
143419
153319
163220
173220
183120
193120
203121
213121
223121
233221
243221
253320
263320
273320
283419
293419
303419
313518

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January 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 January

Winds average 19 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 7 h 06 min at the start of January to 8 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over January. Sunrise moves from 8:18 AM to 7:50 AM, and sunset from 3:23 PM to 4:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
17.18:183:23
27.18:183:24
37.18:173:25
47.18:173:26
57.28:173:27
67.28:163:28
77.28:163:30
87.38:153:31
97.38:153:32
107.38:143:34
117.48:143:35
127.48:133:37
137.48:123:38
147.58:113:40
157.58:103:42
167.68:093:43
177.68:093:45
187.78:073:47
197.78:063:48
207.78:053:50
217.88:043:52
227.88:033:54
237.98:023:55
248.08:003:57
258.07:593:59
268.17:584:01
278.17:564:03
288.27:554:05
298.27:534:07
308.37:524:09
318.37:504:11

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 0.63 kWh/m².

For context, solar energy here swings from a low near 0.43 kWh/m² to a high of 5.71 kWh/m² in June across the year — January's 0.63 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
80.5Dim
90.5Dim
100.5Dim
110.6Dim
120.6Dim
130.6Dim
140.6Dim
150.6Dim
160.6Dim
170.6Dim
180.7Dim
190.7Dim
200.7Dim
210.7Dim
220.7Dim
230.7Dim
240.8Dim
250.8Dim
260.8Dim
270.8Dim
280.8Dim
290.9Dim
300.9Dim
310.9Dim
Planning a trip in January

Is January a good time to visit Wejherowo?

Our two travel scores rate January 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
8th-best month of the year

January is a weaker month for outdoor sightseeing in Wejherowo.

What to pack for Wejherowo in January

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

In January, Wejherowo sees daytime highs around 1°C and nights near -3°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 11 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Wejherowo in January

The nearest coast averages about 4°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 25 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°5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr5Bracing
May9Bracing
Jun14Bracing
Jul17Cool
Aug19Cool
Sep16Cool
Oct13Bracing
Nov9Bracing
Dec6Bracing

UV index in Wejherowo in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 0. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Wejherowo peaks around June 20 at about 6 (high) — a little sun protection helps at midday. It bottoms out near January 1 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 20UV 6Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5Moderate
Jun6High
Jul5High
Aug5Moderate
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Wejherowo?

Wejherowo sits at 54.6°N, 18.2°E, 27 m above sea level, in Poland. The nearest listed city is Reda, 7.0 km away.

Topography around Wejherowo

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

Within 3 km, the terrain around Wejherowo has only modest variations in elevation — a maximum elevation change of 129 m around an average of 66 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 242 m; within 80 km, significant variations in elevation — a maximum elevation change of 339 m.

The land around Wejherowo is covered by trees (67%) within 3 km, trees (57%) and grassland (21%) within 16 km, and water (41%), trees (27%) and cropland (20%) within 80 km.

3 km
129 m
16 km
242 m
80 km
339 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Reda 7.0 km · Rumia 11 km · Gdynia 21 km · Osowa 25 km · Sopot 28 km · Kartuzy 30 km · Przymorze Wielkie 32 km · Lębork 32 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 Wejherowo (54.6057°, 18.2356°, elevation 27 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).