Bad Mergentheim weather in December

In December, Bad Mergentheim sees average daytime highs of 4°C and overnight lows near -0°C, with 73 mm of precipitation across 13.5 wet days and about 8 hours of daylight. It is the 11th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 4°C through the month. The sky is clear or mostly clear about 12% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 18 min at the start of December to 8 hours by month's end. Set against the rest of the year, December is Bad Mergentheim's 12th-clearest and 2nd-windiest month. For the whole year in context, see Bad Mergentheim's year-round climate.

Daytime high
11th warmest
Overnight low
-0°
3rd coldest
Precipitation
73 mm
13.5 wet days
Daylight
8 hours
8:18 AM – 4:16 PM
Cloud cover
78%
12th clearest
Wind
13 km/h
2nd windiest
Solar energy
0.72 kWh/m²
Travel score
0.0
out of 10

Bad Mergentheim is human settlement in Germany.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 4°C through the month.

A typical December day in Bad Mergentheim reaches about 4°C in the afternoon and slips back to -0°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between -1°C and 9°C. Set against its neighbours, December runs about 4°C cooler than November and on par with January.

-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
151
251
351
441
541
641
740
840
940
1040
1140
1240
1340
1440
1540
1640
1740
1840
1940
2040
2140
2240
2340
2440
254-1
263-1
273-1
283-1
293-1
303-1
313-1

How December really feels in Bad Mergentheim

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.

Bad Mergentheim weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°6311.74.58.40.0
Feb / -1°5410.54.39.80.1
Mar / 6211.91.911.51.9
Apr14° / 489.60.313.44.1
May18° / 7412.4015.15.5
Jun22° / 12°6311.80166.2
Jul24° / 14°6612.4015.66.6
Aug24° / 14°5610.4014.26.8
Sep19° / 10°559.9012.45.9
Oct13° / 62110.110.53.6
Nov / 6110.61.68.91.0
Dec / -0°7313.54.880.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 79%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12080
21981
31981
42080
52080
61981
71981
82080
92080
102080
112080
122179
132179
142179
152179
162179
172179
182080
192080
202080
212080
222080
232179
242278
252278
262278
272278
282278
292278
302278
312377

Chance of precipitation in December

Any precipitationSnow

Bad Mergentheim gets around 73 mm of rain and snow over 13.5 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 43% and peaks near 47% on the wettest days, and about 5 days bring snow. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
13611
23711
33712
43812
53912
63912
74012
84013
94113
104213
114214
124314
134315
144415
154415
164516
174516
184616
194616
204617
214617
224617
234618
244618
254718
264718
274717
284617
294617
304616
314616

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 13 km/h in December.

Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412light breeze
512light breeze
612light breeze
712light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 18 min at the start of December to 8 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over December. Sunrise moves from 8:03 AM to 8:24 AM, and sunset from 4:18 PM to 4:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.38:034:18
28.28:044:18
38.28:064:17
48.28:074:17
58.18:084:17
68.18:094:16
78.18:104:16
88.18:114:16
98.18:124:16
108.08:134:16
118.08:144:15
128.08:154:15
138.08:164:16
148.08:174:16
158.08:184:16
168.08:184:16
178.08:194:16
187.98:204:16
197.98:204:17
207.98:214:17
217.98:214:17
227.98:224:18
237.98:224:18
247.98:234:19
257.98:234:19
267.98:234:20
278.08:244:21
288.08:244:21
298.08:244:22
308.08:244:23
318.08:244:24

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.72 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.72 kWh/m² to a high of 5.62 kWh/m² in June across the year — December's 0.72 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.8Dim
20.8Dim
30.8Dim
40.8Dim
50.8Dim
60.8Dim
70.8Dim
80.8Dim
90.8Dim
100.8Dim
110.7Dim
120.7Dim
130.7Dim
140.7Dim
150.7Dim
160.7Dim
170.7Dim
180.7Dim
190.7Dim
200.7Dim
210.7Dim
220.7Dim
230.7Dim
240.7Dim
250.7Dim
260.7Dim
270.7Dim
280.7Dim
290.7Dim
300.7Dim
310.7Dim
Planning a trip in December

Is December a good time to visit Bad Mergentheim?

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

0.0
Sightseeing
11th-best month of the year
0.0
Beach & pool
8th-best month of the year

December is a weaker month for outdoor sightseeing in Bad Mergentheim.

What to pack for Bad Mergentheim in December

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

In December, Bad Mergentheim sees daytime highs around 4°C and nights near -0°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 14 days see rain.

a warm layera heavy coatrain gear

UV index in Bad Mergentheim 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 Bad Mergentheim peaks around July 15 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr4Moderate
May6High
Jun7High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Bad Mergentheim in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Bad Mergentheim is worst in April — around 15 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1515 µg/m³Nov 218 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar14Moderate
Apr15Moderate
May13Moderate
Jun15Moderate
Jul12Moderate
Aug12Moderate
Sep12Good
Oct10Good
Nov8Good
Dec9Good
Location & terrain

Where is Bad Mergentheim?

Bad Mergentheim sits at 49.5°N, 9.8°E, 211 m above sea level, in Germany. The nearest listed city is Lauda-Königshofen, 9.0 km away.

Topography around Bad Mergentheim

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

Within 3 km, the terrain around Bad Mergentheim has only modest variations in elevation — a maximum elevation change of 195 m around an average of 285 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 312 m; within 80 km, large variations in elevation — a maximum elevation change of 676 m.

The land around Bad Mergentheim is covered by trees (41%) and cropland (26%) within 3 km, cropland (45%) and trees (37%) within 16 km, and trees (46%) and cropland (34%) within 80 km.

3 km
195 m
16 km
312 m
80 km
676 m
treesgrasslandcroplandartificial surfaces
December weather nearby: Lauda-Königshofen 9.0 km · Künzelsau 24 km · Rothenburg ob der Tauber 32 km · Buchen in Odenwald 33 km · Wertheim 35 km · Würzburg 36 km · Öhringen 38 km · Kitzingen 39 km

Germany travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 80% of US
price level, 2025
GDP per capita
$60,496
2025
Happiness
6.9 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.9
per 100k, 2023
Road deaths
3.8
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 615
Religion
none 44%Roman Catholic 25%Protestant 23%other 5%

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 Bad Mergentheim (49.4925°, 9.7736°, elevation 211 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).