Karhula weather in January

In January, Karhula sees average daytime highs of -3°C and overnight lows near -7°C, with 47 mm of precipitation across 10.9 wet days and about 6.3 hours of daylight. It is the 11th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about -2°C in the first days to -4°C by the end. The sky is clear or mostly clear about 9% of the time in January, and the air most often feels dry.

Daylight stretches from about 5 h 30 min at the start of January to 7 h 18 min by month's end. Set against the rest of the year, January is Karhula's 10th-clearest and 3rd-windiest month. For the whole year in context, see Karhula's year-round climate.

Daytime high
-3°
11th warmest
Overnight low
-7°
2nd coldest
Precipitation
47 mm
10.9 wet days
Daylight
6 h 12 min
9:16 AM – 3:27 PM
Cloud cover
85%
10th clearest
Wind
16 km/h
3rd windiest
Solar energy
0.28 kWh/m²
Travel score
0.0
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about -2°C in the first days to -4°C by the end.

A typical January day in Karhula reaches about -3°C in the afternoon and slips back to -7°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between -11°C and 3°C. Set against its neighbours, January runs about 2°C cooler than December and on par with February.

-20°-15°-10°-5°151015202531
Avg high (°C)Avg low (°C)
1-2-6
2-2-6
3-2-6
4-2-6
5-2-6
6-2-6
7-2-6
8-2-6
9-2-6
10-2-6
11-2-6
12-2-6
13-2-6
14-2-6
15-2-6
16-2-7
17-3-7
18-3-7
19-3-7
20-3-7
21-3-7
22-3-7
23-3-8
24-3-8
25-3-8
26-3-8
27-3-8
28-4-8
29-4-8
30-4-8
31-4-8

How January really feels in Karhula

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
31 feel bitter (≤ -10°C)

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

Karhula weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-3° / -7°4710.910.96.30.0
Feb-3° / -8°429.29.28.60.0
Mar / -5°3797.211.30.0
Apr / 358.82.614.20.9
May13° / 439.50.116.93.7
Jun17° / 10°6411.1018.55.3
Jul21° / 14°5810.1017.86.4
Aug20° / 13°6611.6015.45.9
Sep15° / 5810.2012.64.2
Oct / 6411.619.71.3
Nov / -0°61125.170.0
Dec-0° / -4°5912.395.50.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 5% of January, with mostly cloudy or overcast conditions the remaining 86%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11882
21783
31783
41684
51684
61684
71585
81684
91684
101684
111684
121486
131486
141486
151486
161486
171387
181387
191288
201189
211189
221189
231189
241288
251387
261387
271387
281387
291387
301486
311486

Chance of precipitation in January

Any precipitationSnow

Karhula gets around 47 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 36% and peaks near 39% on the wettest days, and about 11 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13833
23834
33934
43934
53934
63935
73935
83935
93935
103935
113934
123834
133834
143734
153734
163634
173634
183534
193434
203435
213335
223335
233236
243236
253236
263237
273337
283338
293338
303438
313438

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 16 km/h in January.

Across January, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light 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 January

DaylightNight

Daylight runs from about 5 h 30 min at the start of January to 7 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 108 minutes over January. Sunrise moves from 9:31 AM to 8:47 AM, and sunset from 3:00 PM to 4:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
15.59:313:00
25.59:313:01
35.59:303:02
45.69:303:04
55.69:293:06
65.79:283:07
75.79:273:09
85.79:263:11
95.89:253:13
105.89:243:14
115.99:233:16
125.99:223:18
136.09:203:21
146.19:193:23
156.19:183:25
166.29:163:27
176.29:143:29
186.39:133:32
196.49:113:34
206.59:093:36
216.59:083:39
226.69:063:41
236.79:043:44
246.79:023:46
256.89:003:49
266.98:583:51
277.08:563:54
287.08:543:56
297.18:513:59
307.28:494:02
317.38:474:04

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 0.28 kWh/m².

For context, solar energy here swings from a low near 0.14 kWh/m² to a high of 5.61 kWh/m² in June across the year — January's 0.28 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.2Dim
20.2Dim
30.2Dim
40.2Dim
50.2Dim
60.2Dim
70.2Dim
80.2Dim
90.2Dim
100.2Dim
110.2Dim
120.2Dim
130.2Dim
140.2Dim
150.3Dim
160.3Dim
170.3Dim
180.3Dim
190.3Dim
200.3Dim
210.3Dim
220.3Dim
230.4Dim
240.4Dim
250.4Dim
260.4Dim
270.4Dim
280.5Dim
290.5Dim
300.5Dim
310.5Dim
Planning a trip in January

Is January a good time to visit Karhula?

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

0.0
Sightseeing
8th-best month of the year
0.0
Beach & pool
6th-best month of the year

January is a weaker month for outdoor sightseeing in Karhula.

What to pack for Karhula in January

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

In January, Karhula sees daytime highs around -3°C and nights near -7°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 Karhula in January

The nearest coast averages about 1°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 17 km away) is warmest in August at about 17°C and coldest in February near 0°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
Jan1Bracing
Feb0Bracing
Mar0Bracing
Apr2Bracing
May6Bracing
Jun12Bracing
Jul17Cool
Aug17Cool
Sep14Bracing
Oct10Bracing
Nov7Bracing
Dec4Bracing

UV index in Karhula 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 Karhula peaks around June 20 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 19 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 20UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5High
Jul5Moderate
Aug4Moderate
Sep2Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Karhula?

Karhula sits at 60.5°N, 26.9°E, 4 m above sea level, in Finland. The nearest listed city is Kotka, 6.0 km away.

OrimattilaLahtiMäntsälä

Topography around Karhula

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

Within 3 km, the terrain around Karhula has only modest variations in elevation — a maximum elevation change of 54 m around an average of 15 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 90 m; within 80 km, only modest variations in elevation — a maximum elevation change of 178 m.

The land around Karhula is covered by trees (60%) within 3 km, trees (49%) and water (33%) within 16 km, and water (47%) and trees (44%) within 80 km.

3 km
54 m
16 km
90 m
80 km
178 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Kotka 6.0 km · Hamina 16 km · Anjala 19 km · Kouvola 40 km · Porvoo 71 km · Orimattila 73 km · Lahti 86 km · Mäntsälä 89 km

Finland travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 85% of US
price level, 2025
GDP per capita
$56,149
2025
Happiness
7.8 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1
per 100k, 2023
Road deaths
3.9
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 603
Religion
Lutheran 67%none 31%other 2%Greek Orthodox 1%

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 Karhula (60.5216°, 26.9312°, elevation 4 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).