Vallentuna weather in December

In December, Vallentuna sees average daytime highs of 1°C and overnight lows near -3°C, with 43 mm of precipitation across 10.1 wet days and about 5.8 hours of daylight. It is the 10th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 3°C in the first days to 0°C by the end. The sky is clear or mostly clear about 15% of the time in December, and the air most often feels dry.

Daylight stretches from about 6 h 12 min at the start of December to 5 h 48 min by month's end. Set against the rest of the year, December is Vallentuna's 11th-clearest and 2nd-windiest month. For the whole year in context, see Vallentuna's year-round climate.

Daytime high
10th warmest
Overnight low
-3°
4th coldest
Precipitation
43 mm
10.1 wet days
Daylight
5 h 42 min
8:52 AM – 2:35 PM
Cloud cover
76%
11th clearest
Wind
14 km/h
2nd windiest
Solar energy
0.2 kWh/m²
Travel score
0.0
out of 10

Vallentuna is urban area in Vallentuna and Täby Municipalities, Sweden.

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 3°C in the first days to 0°C by the end.

A typical December day in Vallentuna 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 -4°C and 6°C. Set against its neighbours, December runs about 3°C cooler than November and about 1°C warmer than January.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
13-1
23-1
33-1
43-1
53-1
63-1
72-1
82-1
92-2
102-2
112-2
122-2
132-2
142-2
152-3
161-3
171-3
181-3
191-3
201-3
211-3
221-4
231-4
241-4
250-4
260-4
270-4
280-4
290-4
300-4
310-4

How December really feels in Vallentuna

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.

Vallentuna weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°357.95.66.50.0
Feb / -5°297.76.38.70.0
Mar / -3°297.74.811.30.1
Apr / 3381.714.12.0
May15° / 449.50.216.74.5
Jun19° / 10°6811018.25.7
Jul21° / 13°7011.5017.66.3
Aug20° / 12°7212.2015.36.0
Sep16° / 508.5012.64.9
Oct10° / 489.60.29.82.0
Nov / 451037.30.1
Dec / -3°4310.15.85.80.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11981
21981
31981
41981
52080
62179
72179
82179
92377
102377
112377
122674
132773
142773
152872
162971
173070
183169
193169
203169
213169
223268
233169
243169
253169
263070
273070
283070
293070
302971
312872

Chance of precipitation in December

Any precipitationSnow

Vallentuna gets around 43 mm of rain and snow over 10.1 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 32% and peaks near 34% on the wettest days, and about 6 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
13414
23314
33314
43314
53314
63314
73315
83315
93316
103316
113317
123317
133317
143218
153218
163219
173120
183120
193221
203221
213222
223222
233222
243222
253222
263222
273222
283221
293221
303221
313321

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 14 km/h in December.

Across December, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 6 h 12 min at the start of December to 5 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over December. Sunrise moves from 8:30 AM to 8:57 AM, and sunset from 2:45 PM to 2:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
16.28:302:45
26.28:322:44
36.18:342:43
46.18:362:42
56.18:372:41
66.08:392:40
76.08:412:39
85.98:422:38
95.98:442:38
105.98:452:37
115.88:472:37
125.88:482:36
135.88:492:36
145.88:502:36
155.78:512:35
165.78:522:35
175.78:532:35
185.78:542:36
195.78:552:36
205.78:552:36
215.78:562:36
225.78:572:37
235.78:572:37
245.78:572:38
255.78:582:39
265.78:582:39
275.78:582:40
285.78:582:41
295.78:582:42
305.88:582:43
315.88:572:44

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.2 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.2 kWh/m² to a high of 5.71 kWh/m² in June across the year — December's 0.2 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
150.2Dim
160.2Dim
170.2Dim
180.2Dim
190.2Dim
200.2Dim
210.2Dim
220.2Dim
230.2Dim
240.2Dim
250.2Dim
260.2Dim
270.2Dim
280.2Dim
290.2Dim
300.2Dim
310.2Dim
Planning a trip in December

Is December a good time to visit Vallentuna?

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 Vallentuna.

What to pack for Vallentuna in December

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

In December, Vallentuna sees daytime highs around 1°C and nights near -3°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Vallentuna in December

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

The sea at the nearest coast (about 46 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 Vallentuna 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 Vallentuna peaks around June 17 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateModerateLowJun 17UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5High
Jul5Moderate
Aug4Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Vallentuna?

Vallentuna sits at 59.5°N, 18.1°E, 20 m above sea level, in Sweden. The nearest listed city is Upplands Väsby, 10 km away.

Topography around Vallentuna

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

Within 3 km, the terrain around Vallentuna has only modest variations in elevation — a maximum elevation change of 67 m around an average of 30 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 94 m; within 80 km, only modest variations in elevation — a maximum elevation change of 146 m.

The land around Vallentuna is covered by trees (55%) within 3 km, trees (59%) within 16 km, and trees (47%) and water (34%) within 80 km.

3 km
67 m
16 km
94 m
80 km
146 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Upplands Väsby 10 km · Täby 10 km · Sollentuna 14 km · Åkersberga 14 km · Danderyd 15 km · Märsta 16 km · Rinkeby 18 km · Jakobsberg 18 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 Vallentuna (59.5344°, 18.0776°, elevation 20 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).