Bornheim weather in January

In January, Bornheim sees average daytime highs of 5°C and overnight lows near 1°C, with 63 mm of precipitation across 13 wet days and about 8.2 hours of daylight. It is the 12th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 5°C through the month. The sky is clear or mostly clear about 15% of the time in January, and the air most often feels dry.

Daylight stretches from about 7 h 48 min at the start of January to 8 h 54 min by month's end. Set against the rest of the year, January is Bornheim's 10th-clearest and 1st-windiest month. For the whole year in context, see Bornheim's year-round climate.

Daytime high
12th warmest
Overnight low
1st coldest
Precipitation
63 mm
13 wet days
Daylight
8 h 12 min
8:35 AM – 4:47 PM
Cloud cover
73%
10th clearest
Wind
15 km/h
1st windiest
Solar energy
0.83 kWh/m²
Travel score
0.1
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 5°C through the month.

A typical January day in Bornheim reaches about 5°C in the afternoon and slips back to 1°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between -0°C and 11°C. Set against its neighbours, January runs on par with December and about 1°C cooler than February.

-10°-5°10°15°151015202531
Avg high (°C)Avg low (°C)
151
251
351
451
551
651
751
851
951
1051
1151
1251
1351
1451
1551
1651
1751
1851
1951
2051
2151
2251
2351
2451
2551
2650
2750
2850
2950
3050
3150

How January really feels in Bornheim

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.

Bornheim weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 63132.48.20.1
Feb / 5511.43.39.70.5
Mar10° / 5912.81.111.52.1
Apr14° / 4810.40.213.54.1
May18° / 6111.6015.25.5
Jun21° / 12°7111.8016.26.1
Jul23° / 14°7412.7015.86.4
Aug23° / 14°7811.9014.36.5
Sep19° / 11°6210.5012.45.9
Oct14° / 6511.6010.43.9
Nov / 6612.70.88.71.6
Dec / 7514.937.80.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% 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 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12476
22476
32575
42575
52674
62773
72773
82971
92872
102971
113070
123070
133070
143070
152971
162971
172773
182773
192773
202773
212674
222674
232575
242575
252476
262377
272476
282476
292476
302476
312476

Chance of precipitation in January

Any precipitationSnow

Bornheim gets around 63 mm of rain and snow over 13 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 49% on the wettest days, and about 2 days bring snow. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1499
2488
3488
4477
5477
6466
7456
8456
9446
10436
11436
12426
13426
14416
15416
16417
17407
18407
19408
20408
21408
22409
23409
244110
254110
264111
274011
284011
294011
303912
313912

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

Across January, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light 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 January

DaylightNight

Daylight runs from about 7 h 48 min at the start of January to 8 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over January. Sunrise moves from 8:41 AM to 8:20 AM, and sunset from 4:29 PM to 5:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
17.88:414:29
27.88:414:30
37.88:414:31
47.98:414:32
57.98:414:33
67.98:404:34
77.98:404:36
87.98:404:37
98.08:394:38
108.08:394:39
118.08:384:40
128.18:384:42
138.18:374:43
148.18:374:44
158.28:364:46
168.28:354:47
178.28:354:49
188.38:344:50
198.38:334:52
208.48:324:53
218.48:314:55
228.48:304:56
238.58:294:58
248.58:284:59
258.68:275:01
268.68:265:03
278.78:255:04
288.78:245:06
298.88:225:08
308.88:215:09
318.98:205:11

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 0.83 kWh/m².

For context, solar energy here swings from a low near 0.62 kWh/m² to a high of 5.33 kWh/m² in June across the year — January's 0.83 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.6Dim
20.7Dim
30.7Dim
40.7Dim
50.7Dim
60.7Dim
70.7Dim
80.7Dim
90.7Dim
100.7Dim
110.8Dim
120.8Dim
130.8Dim
140.8Dim
150.8Dim
160.8Dim
170.8Dim
180.8Dim
190.9Dim
200.9Dim
210.9Dim
220.9Dim
230.9Dim
241.0Dim
251.0Dim
261.0Dim
271.0Dim
281.0Dim
291.1Dim
301.1Dim
311.1Dim
Planning a trip in January

Is January a good time to visit Bornheim?

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

0.1
Sightseeing
12th-best month of the year
0.0
Beach & pool
8th-best month of the year

January is a weaker month for outdoor sightseeing in Bornheim.

What to pack for Bornheim in January

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

In January, Bornheim sees daytime highs around 5°C and nights near 1°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 13 days see rain.

a warm layera heavy coatrain gear

UV index in Bornheim 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 Bornheim peaks around July 13 at about 6 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 13UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Bornheim 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 Bornheim is worst in April — around 15 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1415 µg/m³Dec 109 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar14Moderate
Apr15Moderate
May13Moderate
Jun14Moderate
Jul12Good
Aug12Moderate
Sep12Good
Oct10Good
Nov9Good
Dec9Good
Location & terrain

Where is Bornheim?

Bornheim sits at 50.8°N, 7.0°E, 62 m above sea level, in Germany. The nearest listed city is Alfter, 4.0 km away.

Topography around Bornheim

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

Within 3 km, the terrain around Bornheim has only modest variations in elevation — a maximum elevation change of 142 m around an average of 85 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 220 m; within 80 km, large variations in elevation — a maximum elevation change of 1,018 m.

The land around Bornheim is covered by cropland (35%), trees (26%) and grassland (25%) within 3 km, trees (37%) and cropland (28%) within 16 km, and trees (52%) and grassland (21%) within 80 km.

3 km
142 m
16 km
220 m
80 km
1,018 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Alfter 4.0 km · Niederkassel 7.0 km · Wesseling 7.0 km · Bonn Hardtberg 8.0 km · Bonn 8.0 km · Brühl 10 km · Weilerswist 10 km · Troisdorf 12 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 Bornheim (50.7631°, 6.9909°, elevation 62 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).