Calw weather in January

In January, Calw sees average daytime highs of 3°C and overnight lows near -2°C, with 83 mm of precipitation across 13.2 wet days and about 8.5 hours of daylight. It is the 12th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 3°C through the month. The sky is clear or mostly clear about 17% 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 h 06 min by month's end. Set against the rest of the year, January is Calw's 10th-clearest and 2nd-windiest month. For the whole year in context, see Calw's year-round climate.

Daytime high
12th warmest
Overnight low
-2°
2nd coldest
Precipitation
83 mm
13.2 wet days
Daylight
8 h 30 min
8:20 AM – 4:49 PM
Cloud cover
71%
10th clearest
Wind
12 km/h
2nd windiest
Solar energy
1.09 kWh/m²
Travel score
0.0
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 3°C through the month.

A typical January day in Calw reaches about 3°C in the afternoon and slips back to -2°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between -3°C and 9°C. Set against its neighbours, January runs on par with December and about 1°C cooler than February.

-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
13-1
23-1
33-1
43-1
53-1
63-1
73-1
83-1
93-1
103-1
113-1
123-1
133-2
143-2
153-2
163-2
173-2
183-2
193-2
203-2
213-2
223-2
233-2
243-2
253-2
263-2
273-2
283-2
293-2
303-2
313-2

How January really feels in Calw

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.

Calw weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°8313.25.78.50.0
Feb / -2°7211.55.69.80.1
Mar / 8813.63.511.61.6
Apr14° / 7412.7113.43.6
May18° / 11015.90.1154.9
Jun21° / 12°10714.8015.95.7
Jul23° / 13°11815.3015.56.0
Aug23° / 13°10614.3014.26.2
Sep18° / 10°8512.7012.45.4
Oct13° / 8612.80.210.53.4
Nov / 8012.32.590.9
Dec / -1°9414.65.88.10.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 71%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12674
22773
32773
42773
52773
62872
72872
82971
92971
102971
113070
123169
133169
143268
153268
163268
173169
183169
193169
203169
213070
222971
232971
242971
252872
262872
272872
282872
292872
302872
312971

Chance of precipitation in January

Any precipitationSnow

Calw gets around 83 mm of rain and snow over 13.2 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 42% and peaks near 47% on the wettest days, and about 6 days bring snow. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
14718
24718
34717
44717
54717
64616
74516
84516
94415
104315
114315
124215
134115
144116
154116
164017
174017
184018
194019
204020
214020
224021
234022
244122
254123
264123
274123
284023
294023
304023
314023

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.

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
2912calm
3012calm
3112calm

Sunrise & sunset in January

DaylightNight

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

Days grow by about 60 minutes over January. Sunrise moves from 8:24 AM to 8:06 AM, and sunset from 4:32 PM to 5:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.18:244:32
28.18:244:33
38.28:244:34
48.28:244:35
58.28:244:36
68.28:244:37
78.28:244:38
88.38:234:39
98.38:234:40
108.38:234:41
118.38:224:42
128.48:224:44
138.48:214:45
148.48:214:46
158.58:204:48
168.58:204:49
178.58:194:50
188.68:184:52
198.68:184:53
208.68:174:54
218.78:164:56
228.78:154:57
238.78:144:59
248.88:135:00
258.88:125:02
268.98:115:03
278.98:105:05
289.08:095:06
299.08:085:08
309.08:075:09
319.18:065:11

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.09 kWh/m².

For context, solar energy here swings from a low near 0.85 kWh/m² to a high of 5.56 kWh/m² in June across the year — January's 1.09 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.9Dim
20.9Dim
30.9Dim
40.9Dim
50.9Dim
60.9Dim
70.9Dim
80.9Dim
91.0Dim
101.0Dim
111.0Dim
121.0Dim
131.0Dim
141.1Dim
151.1Dim
161.1Dim
171.1Dim
181.1Dim
191.1Dim
201.2Dim
211.2Dim
221.2Dim
231.2Dim
241.3Dim
251.3Dim
261.3Dim
271.3Dim
281.4Dim
291.4Dim
301.4Dim
311.4Dim
Planning a trip in January

Is January a good time to visit Calw?

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 Calw.

What to pack for Calw in January

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

In January, Calw sees daytime highs around 3°C and nights near -2°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 13 days see rain.

a warm layera heavy coatrain gear

UV index in Calw 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 Calw peaks around July 15 at about 8 (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 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr4Moderate
May6High
Jun7High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Calw?

Calw sits at 48.7°N, 8.7°E, 339 m above sea level, in Germany. The nearest listed city is Weil der Stadt, 10 km away.

Topography around Calw

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

Within 3 km, the terrain around Calw has significant variations in elevation — a maximum elevation change of 293 m around an average of 495 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 533 m; within 80 km, large variations in elevation — a maximum elevation change of 1,097 m.

The land around Calw is covered by trees (60%) within 3 km, trees (58%) within 16 km, and trees (51%) and cropland (22%) within 80 km.

3 km
293 m
16 km
533 m
80 km
1,097 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Weil der Stadt 10 km · Renningen 16 km · Herrenberg 16 km · Nagold 18 km · Pforzheim 19 km · Böblingen 20 km · Sindelfingen 20 km · Leonberg 22 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 Calw (48.7142°, 8.7403°, elevation 339 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).