Trondheim weather in January

In January, Trondheim sees average daytime highs of 0°C and overnight lows near -5°C, with 96 mm of precipitation across 15.9 wet days and about 5.2 hours of daylight. It is the 12th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 0°C through the month. The sky is clear or mostly clear about 14% of the time in January, and the air most often feels dry.

Daylight stretches from about 4 h 12 min at the start of January to 6 h 36 min by month's end. Set against the rest of the year, January is Trondheim's 10th-clearest and 1st-windiest month. For the whole year in context, see Trondheim's year-round climate.

Daytime high
12th warmest
Overnight low
-5°
2nd coldest
Precipitation
96 mm
15.9 wet days
Daylight
5 h 12 min
9:53 AM – 3:03 PM
Cloud cover
76%
10th clearest
Wind
10 km/h
1st windiest
Solar energy
0.16 kWh/m²
Travel score
0.0
out of 10

Trondheim is city in Trøndelag, Norway.

Air quality
Good
PM2.5 5.7 µg/m³ · 2019
Density
3,766/km²
people per km²
Founded
~997 CE

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 0°C through the month.

A typical January day in Trondheim reaches about 0°C in the afternoon and slips back to -5°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between -6°C and 6°C. Set against its neighbours, January runs on par with December and on par with February.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
10-5
20-5
30-5
40-5
50-5
60-5
70-5
80-5
91-5
101-4
111-4
121-4
131-4
141-4
151-4
161-4
170-4
180-4
190-5
200-5
210-5
220-5
230-5
240-5
250-5
260-5
270-5
280-5
290-5
300-5
310-5

How January really feels in Trondheim

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.

Trondheim weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°9615.912.75.20.0
Feb / -5°8414.211.98.10.0
Mar / -3°8815.410.811.20.1
Apr / 6713.65.414.51.6
May13° / 7015.61.417.73.2
Jun16° / 9515.6019.84.3
Jul19° / 11°8514.8018.95.3
Aug19° / 11°9914.9015.95.1
Sep14° / 10214.8012.73.6
Oct / 8715.22.89.41.3
Nov / -1°7913.27.36.20.0
Dec / -4°9415.310.74.20.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 8% of January, with mostly cloudy or overcast conditions the remaining 78%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22278
32278
42377
52377
62377
72278
82278
92278
102278
112278
122278
132278
142278
152278
162278
172278
182278
192278
202278
212179
222179
232179
242080
252080
262179
272179
282179
292179
302179
312179

Chance of precipitation in January

Any precipitationSnow

Trondheim gets around 96 mm of rain and snow over 15.9 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 51% and peaks near 55% on the wettest days, and about 13 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
14939
24939
34939
44939
54939
64939
74939
85039
95038
104938
114938
124938
135038
145038
155039
165039
175039
185140
195140
205141
215241
225242
235342
245343
255443
265443
275444
285544
295544
305545
315545

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 10 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 4 h 12 min at the start of January to 6 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 144 minutes over January. Sunrise moves from 10:16 AM to 9:15 AM, and sunset from 2:28 PM to 3:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
14.210:162:28
24.210:152:29
34.310:142:31
44.310:132:33
54.410:122:35
64.510:102:37
74.510:092:40
84.610:072:42
94.610:062:44
104.710:042:47
114.810:022:49
124.910:012:52
134.99:592:54
145.09:572:57
155.19:553:00
165.29:533:03
175.39:503:06
185.39:483:09
195.49:463:11
205.59:443:14
215.69:413:17
225.79:393:20
235.89:363:23
245.99:343:27
256.09:313:30
266.19:293:33
276.29:263:36
286.39:233:39
296.49:213:42
306.59:183:45
316.69:153:49

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 0.16 kWh/m².

For context, solar energy here swings from a low near 0.06 kWh/m² to a high of 4.7 kWh/m² in June across the year — January's 0.16 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.1Dim
20.1Dim
30.1Dim
40.1Dim
50.1Dim
60.1Dim
70.1Dim
80.1Dim
90.1Dim
100.1Dim
110.1Dim
120.1Dim
130.1Dim
140.1Dim
150.1Dim
160.1Dim
170.2Dim
180.2Dim
190.2Dim
200.2Dim
210.2Dim
220.2Dim
230.2Dim
240.2Dim
250.3Dim
260.3Dim
270.3Dim
280.3Dim
290.3Dim
300.3Dim
310.3Dim
Planning a trip in January

Is January a good time to visit Trondheim?

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

0.0
Sightseeing
9th-best month of the year
0.0
Beach & pool
6th-best month of the year

January is a weaker month for outdoor sightseeing in Trondheim.

What to pack for Trondheim in January

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

In January, Trondheim sees daytime highs around 0°C and nights near -5°C. Pack a warm layer, a heavy coat and rain gear. About 16 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Trondheim in January

The nearest coast averages about 6°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 55 km away) is warmest in August at about 14°C and coldest in March near 5°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

5°10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan6Bracing
Feb6Bracing
Mar5Bracing
Apr6Bracing
May8Bracing
Jun10Bracing
Jul13Bracing
Aug14Bracing
Sep13Bracing
Oct11Bracing
Nov9Bracing
Dec7Bracing

UV index in Trondheim 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 Trondheim peaks around July 13 at about 4 (moderate) — 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 4 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJul 13UV 4Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb0Low
Mar1Low
Apr2Moderate
May4Moderate
Jun4Moderate
Jul5Moderate
Aug4Moderate
Sep2Low
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Trondheim?

Trondheim sits at 63.4°N, 10.4°E, 18 m above sea level, in Norway. The nearest listed city is Stjørdalshalsen, 27 km away.

MoldeÖstersundAlesundLillehammer

Topography around Trondheim

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

Within 3 km, the terrain around Trondheim has significant variations in elevation — a maximum elevation change of 312 m around an average of 52 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 558 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,431 m.

The land around Trondheim is covered by trees (33%), artificial surfaces (31%) and water (31%) within 3 km, water (48%) and trees (34%) within 16 km, and grassland (37%), trees (36%) and water (22%) within 80 km.

3 km
312 m
16 km
558 m
80 km
1,431 m
treesgrasslandcroplandartificial surfaceswatermoss and lichen
January weather nearby: Stjørdalshalsen 27 km · Levanger 57 km · Åre 134 km · Kristiansund 138 km · Molde 180 km · Östersund 214 km · Alesund 239 km · Lillehammer 257 km

Norway travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 91% of US
price level, 2025
GDP per capita
$94,594
2025
Happiness
7.2 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
2.1
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 613
Religion
Church of Norway 68%other Christian 4%Muslim 3%Roman Catholic 3%

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 Trondheim (63.4305°, 10.3951°, elevation 18 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).