Heilbronn weather in January

In January, Heilbronn sees average daytime highs of 4°C and overnight lows near -1°C, with 76 mm of precipitation across 12.3 wet days and about 8.5 hours of daylight. It is the 12th-warmest and 3rd-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 16% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 06 min at the start of January to 9 hours by month's end. Set against the rest of the year, January is Heilbronn's 10th-clearest and 1st-windiest month. For the whole year in context, see Heilbronn's year-round climate.

Daytime high
12th warmest
Overnight low
-1°
1st coldest
Precipitation
76 mm
12.3 wet days
Daylight
8 h 24 min
8:20 AM – 4:45 PM
Cloud cover
74%
10th clearest
Wind
12 km/h
1st windiest
Solar energy
0.98 kWh/m²
Travel score
0.0
out of 10
Air quality
Moderate
PM2.5 11.6 µg/m³ · 2019

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 4°C through the month.

A typical January day in Heilbronn reaches about 4°C in the afternoon and slips back to -1°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between -2°C and 9°C. Set against its neighbours, January runs on par with December and about 2°C cooler than February.

-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
14-1
24-1
34-1
44-1
54-1
64-1
74-1
84-1
94-1
104-1
114-1
124-1
134-1
144-1
154-1
164-1
174-1
184-1
193-1
203-1
213-1
223-1
233-1
243-1
253-1
263-1
273-1
283-1
294-1
304-1
314-1

How January really feels in Heilbronn

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.

Heilbronn 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 / -1°7612.34.48.50.0
Feb / -1°6611.34.39.80.2
Mar10° / 7612.5211.62.0
Apr15° / 5210.40.213.44.2
May19° / 7913.10155.5
Jun22° / 13°6612.2015.96.2
Jul24° / 14°7412.7015.66.5
Aug24° / 14°6211.1014.26.7
Sep19° / 11°6310.3012.46.0
Oct14° / 7211.80.110.53.7
Nov / 7211.61.48.91.1
Dec / 9014.64.78.10.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 10% of January, with mostly cloudy or overcast conditions the remaining 74%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22377
32377
42476
52476
62476
72476
82476
92575
102674
112674
122773
132773
142674
152773
162773
172773
182872
192773
202773
212773
222773
232674
242674
252674
262575
272575
282575
292575
302575
312575

Chance of precipitation in January

Any precipitationSnow

Heilbronn gets around 76 mm of rain and snow over 12.3 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 40% and peaks near 47% on the wettest days, and about 4 days bring snow. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
14715
24615
34614
44514
54513
64413
74312
84212
94112
104012
114011
123912
133812
143812
153712
163713
173713
183714
193715
203715
213716
223717
233817
243817
253818
263818
273818
283819
293819
303819
313818

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

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

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 06 min at the start of January to 9 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over January. Sunrise moves from 8:24 AM to 8:05 AM, and sunset from 4:28 PM to 5:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.18:244:28
28.18:244:29
38.18:244:30
48.18:244:31
58.18:244:32
68.28:244:33
78.28:244:34
88.28:234:35
98.28:234:36
108.28:234:38
118.38:224:39
128.38:224:40
138.38:214:41
148.48:214:43
158.48:204:44
168.48:204:45
178.58:194:47
188.58:184:48
198.58:174:49
208.68:174:51
218.68:164:52
228.68:154:54
238.78:144:55
248.78:134:57
258.88:124:58
268.88:115:00
278.98:105:01
288.98:095:03
298.98:085:04
309.08:065:06
319.08:055:08

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 0.98 kWh/m².

For context, solar energy here swings from a low near 0.75 kWh/m² to a high of 5.6 kWh/m² in June across the year — January's 0.98 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
90.9Dim
100.9Dim
110.9Dim
120.9Dim
130.9Dim
140.9Dim
151.0Dim
161.0Dim
171.0Dim
181.0Dim
191.0Dim
201.1Dim
211.1Dim
221.1Dim
231.1Dim
241.1Dim
251.2Dim
261.2Dim
271.2Dim
281.2Dim
291.3Dim
301.3Dim
311.3Dim
Planning a trip in January

Is January a good time to visit Heilbronn?

Our two travel scores rate January 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

January is a weaker month for outdoor sightseeing in Heilbronn.

What to pack for Heilbronn in January

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

In January, Heilbronn sees daytime highs around 4°C and nights near -1°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 12 days see rain.

a warm layera heavy coatrain gear

UV index in Heilbronn in January

LowModerateHighVery highExtreme

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

Under clear skies, the midday UV index in Heilbronn 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 Heilbronn in January

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Heilbronn is worst in April — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (November, 8 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Heilbronn's WHO annual average of 11.6 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1715 µg/m³Nov 238 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar13Moderate
Apr15Moderate
May14Moderate
Jun15Moderate
Jul12Moderate
Aug13Moderate
Sep12Good
Oct10Good
Nov8Good
Dec8Good
Location & terrain

Where is Heilbronn?

Heilbronn sits at 49.1°N, 9.2°E, 173 m above sea level, in Germany. The nearest listed city is Neckarsulm, 5.0 km away.

Topography around Heilbronn

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

Within 3 km, the terrain around Heilbronn has only modest variations in elevation — a maximum elevation change of 181 m around an average of 196 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 416 m; within 80 km, large variations in elevation — a maximum elevation change of 910 m.

The land around Heilbronn is covered by artificial surfaces (43%) and trees (34%) within 3 km, cropland (37%) and trees (31%) within 16 km, and trees (47%) and cropland (28%) within 80 km.

3 km
181 m
16 km
416 m
80 km
910 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Neckarsulm 5.0 km · Brackenheim 13 km · Bad Rappenau 14 km · Öhringen 22 km · Eppingen 22 km · Marbach am Neckar 22 km · Sachsenheim 23 km · Bietigheim-Bissingen 23 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 Heilbronn (49.1399°, 9.2205°, elevation 173 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).