Thun weather in December

In December, Thun sees average daytime highs of 3°C and overnight lows near -4°C, with 122 mm of precipitation across 13.7 wet days and about 8.4 hours of daylight. It is the 11th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 4°C in the first days to 2°C by the end. The sky is clear or mostly clear about 28% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 36 min at the start of December to 8 h 24 min by month's end. Set against the rest of the year, December is Thun's 10th-clearest and 1st-windiest month. For the whole year in context, see Thun's year-round climate.

Daytime high
11th warmest
Overnight low
-4°
3rd coldest
Precipitation
122 mm
13.7 wet days
Daylight
8 h 24 min
8:15 AM – 4:37 PM
Cloud cover
62%
10th clearest
Wind
7 km/h
1st windiest
Solar energy
1.17 kWh/m²
Travel score
0.0
out of 10
Air quality
Excellent
PM10 12.4 µg/m³ · 2020

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 4°C in the first days to 2°C by the end.

A typical December day in Thun reaches about 3°C in the afternoon and slips back to -4°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between -2°C and 7°C. Set against its neighbours, December runs about 4°C cooler than November and on par with January.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
14-3
24-3
34-3
43-3
53-3
63-3
73-3
83-3
93-3
103-3
113-4
123-4
133-4
143-4
153-4
163-4
173-4
182-4
192-4
202-4
212-4
222-4
232-4
242-4
252-4
262-4
272-4
282-4
292-4
302-5
312-5

How December really feels in Thun

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.

Thun weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°10712.911.48.80.0
Feb / -5°10011.710.4100.0
Mar / -1°10814.19.511.61.0
Apr11° / 12014.86.713.32.4
May15° / 18318.32.614.83.8
Jun19° / 10°182180.415.64.9
Jul21° / 11°19316.80.215.35.6
Aug20° / 11°180160.1145.6
Sep16° / 13713.7112.44.8
Oct12° / 11212.42.810.63.1
Nov / -1°11713.27.99.20.6
Dec / -4°12213.711.48.40.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43961
53961
63961
74060
84060
94060
104060
114060
124060
134060
144060
154060
163961
173961
183961
193961
203961
213961
224060
234060
244060
254060
264060
274159
284159
294159
304159
314159

Chance of precipitation in December

Any precipitationSnow

Thun gets around 122 mm of rain and snow over 13.7 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 44% and peaks near 45% on the wettest days, and about 11 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
14132
24232
34233
44334
54334
64335
74435
84436
94436
104437
114537
124537
134538
144538
154538
164537
174537
184537
194537
204437
214537
224538
234538
244538
254538
264538
274538
284538
294538
304438
314438

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 7 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 36 min at the start of December to 8 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 8:01 AM to 8:21 AM, and sunset from 4:38 PM to 4:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.68:014:38
28.68:024:38
38.68:034:37
48.58:044:37
58.58:054:37
68.58:064:36
78.58:074:36
88.58:084:36
98.58:094:36
108.48:104:36
118.48:114:36
128.48:124:36
138.48:124:36
148.48:134:36
158.48:144:36
168.48:154:37
178.48:154:37
188.48:164:37
198.38:174:37
208.38:174:38
218.38:184:38
228.38:184:39
238.38:194:39
248.38:194:40
258.38:204:40
268.48:204:41
278.48:204:42
288.48:204:42
298.48:214:43
308.48:214:44
318.48:214:44

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.17 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.17 kWh/m² to a high of 5.73 kWh/m² in July across the year — December's 1.17 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.3Dim
21.3Dim
31.3Dim
41.3Dim
51.3Dim
61.2Dim
71.2Dim
81.2Dim
91.2Dim
101.2Dim
111.2Dim
121.2Dim
131.2Dim
141.2Dim
151.2Dim
161.2Dim
171.2Dim
181.1Dim
191.1Dim
201.1Dim
211.1Dim
221.1Dim
231.1Dim
241.2Dim
251.2Dim
261.2Dim
271.2Dim
281.2Dim
291.2Dim
301.2Dim
311.2Dim
Planning a trip in December

Is December a good time to visit Thun?

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 Thun.

What to pack for Thun in December

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

In December, Thun sees daytime highs around 3°C and nights near -4°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 14 days see rain.

a warm layera heavy coatrain gear

UV index in Thun in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Thun peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar5Moderate
Apr6High
May7Very high
Jun8Very high
Jul9Very high
Aug7Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Thun?

Thun sits at 46.8°N, 7.6°E, 560 m above sea level, in Switzerland. The nearest listed city is Steffisburg, 3.0 km away.

InterlakenKönizBernLauterbrunnenBurgdorfGrindelwaldFribourg

Topography around Thun

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

Within 3 km, the terrain around Thun has significant variations in elevation — a maximum elevation change of 456 m around an average of 603 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,858 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,156 m.

The land around Thun is covered by trees (39%) and artificial surfaces (23%) within 3 km, trees (43%) and grassland (43%) within 16 km, and trees (39%) and grassland (36%) within 80 km.

3 km
456 m
16 km
1,858 m
80 km
4,156 m
treesgrasslandcroplandartificial surfacesbare terrainsnow and icewatermoss and lichen
December weather nearby: Steffisburg 3.0 km · Interlaken 20 km · Köniz 25 km · Bern 26 km · Lauterbrunnen 28 km · Burgdorf 34 km · Grindelwald 35 km · Fribourg 36 km

Switzerland travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / J
230 V · 50 Hz
Prices
≈ 112% of US
price level, 2025
GDP per capita
$114,769
2025
Happiness
7.0 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
0.6
per 100k, 2023
Road deaths
2.2
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 564
Religion
Roman Catholic 34%none 29%Protestant 23%other Christian 6%

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 Thun (46.7512°, 7.6217°, elevation 560 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. 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).