Norrtälje weather in January

In January, Norrtälje sees average daytime highs of 0°C and overnight lows near -3°C, with 36 mm of precipitation across 8.6 wet days and about 6.5 hours of daylight. It is the 11th-warmest and 9th-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 5 h 42 min at the start of January to 7 h 30 min by month's end. Set against the rest of the year, January is Norrtälje's 11th-clearest and 1st-windiest month. For the whole year in context, see Norrtälje's year-round climate.

Daytime high
11th warmest
Overnight low
-3°
2nd coldest
Precipitation
36 mm
8.6 wet days
Daylight
6 h 24 min
8:42 AM – 3:07 PM
Cloud cover
77%
11th clearest
Wind
18 km/h
1st windiest
Solar energy
0.34 kWh/m²
Travel score
0.0
out of 10

Norrtälje is urban area in Norrtälje Municipality, Sweden.

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 Norrtälje reaches about 0°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 5°C. Set against its neighbours, January runs about 2°C cooler than December and on par with February.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
11-3
21-3
31-3
41-3
51-3
61-3
71-3
81-3
91-3
101-3
111-3
121-3
131-3
141-3
151-3
161-3
171-3
180-3
190-3
200-3
210-3
220-4
230-4
240-4
250-4
260-4
270-4
280-4
290-4
300-4
310-4

How January really feels in Norrtälje

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.

Norrtälje weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°368.66.56.50.0
Feb / -4°297.378.70.0
Mar / -2°297.4511.30.0
Apr / 317.8214.11.4
May13° / 398.50.116.73.8
Jun17° / 10°5910018.25.5
Jul20° / 13°6210.2017.66.4
Aug20° / 13°6411.5015.36.0
Sep15° / 509012.64.6
Oct10° / 509.70.39.82.0
Nov / 4910.73.17.20.2
Dec / -2°4610.86.45.80.0

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 11% of January, with mostly cloudy or overcast conditions the remaining 75%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12674
22674
32575
42575
52674
62674
72674
82674
92674
102674
112674
122674
132674
142674
152674
162674
172674
182575
192575
202575
212575
222575
232476
242476
252476
262476
272476
282476
292476
302476
312575

Chance of precipitation in January

Any precipitationSnow

Norrtälje gets around 36 mm of rain and snow over 8.6 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 29% and peaks near 33% on the wettest days, and about 7 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
13322
23322
33221
43221
53221
63120
73120
83120
93020
103020
113020
122920
132921
142921
152921
162821
172821
182721
192721
202721
212622
222622
232622
242623
252623
262624
272724
282724
292725
302725
312725

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

Across January, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 5 h 42 min at the start of January to 7 h 30 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 8:56 AM to 8:15 AM, and sunset from 2:40 PM to 3:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
15.78:562:40
25.88:562:42
35.88:552:43
45.88:552:44
55.98:542:46
65.98:542:48
75.98:532:49
86.08:522:51
96.08:512:53
106.18:502:55
116.18:492:56
126.28:482:58
136.28:463:00
146.38:453:02
156.38:443:04
166.48:423:07
176.58:413:09
186.58:393:11
196.68:383:13
206.78:363:15
216.78:343:18
226.88:333:20
236.98:313:22
246.98:293:25
257.08:273:27
267.18:253:30
277.18:233:32
287.28:213:35
297.38:193:37
307.48:173:40
317.58:153:42

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 0.34 kWh/m².

For context, solar energy here swings from a low near 0.19 kWh/m² to a high of 5.93 kWh/m² in June across the year — January's 0.34 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
80.3Dim
90.3Dim
100.3Dim
110.3Dim
120.3Dim
130.3Dim
140.3Dim
150.3Dim
160.3Dim
170.3Dim
180.3Dim
190.4Dim
200.4Dim
210.4Dim
220.4Dim
230.4Dim
240.4Dim
250.5Dim
260.5Dim
270.5Dim
280.5Dim
290.5Dim
300.6Dim
310.6Dim
Planning a trip in January

Is January a good time to visit Norrtälje?

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
7th-best month of the year

January is a weaker month for outdoor sightseeing in Norrtälje.

What to pack for Norrtälje in January

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

In January, Norrtälje sees daytime highs around 0°C and nights near -3°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Norrtälje in January

The nearest coast averages about 3°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 18 km away) is warmest in August at about 17°C and coldest in February near 1°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
Jan3Bracing
Feb1Bracing
Mar2Bracing
Apr3Bracing
May6Bracing
Jun11Bracing
Jul16Cool
Aug17Cool
Sep14Bracing
Oct10Bracing
Nov7Bracing
Dec4Bracing

UV index in Norrtälje 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 Norrtälje peaks around June 17 at about 5 (moderate) — 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJun 17UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5Moderate
Jul5Moderate
Aug4Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Norrtälje?

Norrtälje sits at 59.8°N, 18.7°E, 13 m above sea level, in Sweden. The nearest listed city is Åkersberga, 38 km away.

Topography around Norrtälje

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

Within 3 km, the terrain around Norrtälje has only modest variations in elevation — a maximum elevation change of 51 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 68 m; within 80 km, only modest variations in elevation — a maximum elevation change of 111 m.

The land around Norrtälje is covered by trees (43%) and grassland (23%) within 3 km, trees (61%) within 16 km, and water (53%) and trees (35%) within 80 km.

3 km
51 m
16 km
68 m
80 km
111 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Åkersberga 38 km · Vallentuna 43 km · Täby 50 km · Märsta 50 km · Gustavsberg 51 km · Upplands Väsby 52 km · Boo 53 km · Lidingö 54 km

Sweden travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 87% of US
price level, 2025
GDP per capita
$63,133
2025
Happiness
7.3 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
3.1
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 609
Religion
Church of Sweden 54%none or unspecified 37%other 9%

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 Norrtälje (59.758°, 18.705°, elevation 13 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).