Arlon weather in December

In December, Arlon sees average daytime highs of 4°C and overnight lows near 0°C, with 98 mm of precipitation across 14 wet days and about 8 hours of daylight. It is the 11th-warmest and 1st-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 11% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 12 min at the start of December to 8 hours by month's end. Set against the rest of the year, December is Arlon's 11th-clearest and 2nd-windiest month. For the whole year in context, see Arlon's year-round climate.

Daytime high
11th warmest
Overnight low
3rd coldest
Precipitation
98 mm
14 wet days
Daylight
7 h 54 min
8:35 AM – 4:31 PM
Cloud cover
80%
11th clearest
Wind
16 km/h
2nd windiest
Solar energy
0.66 kWh/m²
Travel score
0.0
out of 10

Arlon is town in Arlon municipality, Belgium.

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 Arlon 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 3°C cooler than November and on par with January.

-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
151
251
351
451
551
651
741
841
941
1041
1140
1240
1340
1440
1540
1640
1740
1840
1940
2040
2140
2240
2340
2440
2540
2640
2740
2840
2940
3040
3140

How December really feels in Arlon

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.

Arlon weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°8212.748.40.0
Feb / -1°6811.14.69.80.1
Mar / 7112.62.211.51.6
Apr13° / 6312.10.613.43.3
May17° / 7613.9015.14.7
Jun20° / 11°7612.20165.7
Jul22° / 13°7612.9015.76.2
Aug22° / 13°7712.4014.26.2
Sep18° / 10°6910.5012.45.4
Oct13° / 7411.70.110.53.3
Nov / 7512.81.58.80.9
Dec / 98144.280.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 7% of December, with mostly cloudy or overcast conditions the remaining 82%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11783
21783
31882
41882
51882
61981
72080
82080
92179
102080
112080
122080
132080
142080
152080
162080
171981
181882
191882
201882
211882
221783
231783
241783
251783
261783
271783
281783
291783
301783
311783

Chance of precipitation in December

Any precipitationSnow

Arlon gets around 98 mm of rain and snow over 14 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 45% and peaks near 47% on the wettest days, and about 4 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
14211
24211
34211
44311
54311
64311
74311
84311
94311
104412
114412
124412
134513
144513
154613
164614
174614
184614
194715
204715
214715
224715
234715
244715
254715
264615
274615
284614
294614
304614
314613

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 16 km/h in December.

Across December, daily wind ranges from about 15 km/h on the calmest days to 16 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
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 12 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 12 minutes over December. Sunrise moves from 8:20 AM to 8:41 AM, and sunset from 4:33 PM to 4:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.28:204:33
28.28:214:33
38.28:224:32
48.18:234:32
58.18:254:32
68.18:264:31
78.18:274:31
88.08:284:31
98.08:294:31
108.08:304:30
118.08:314:30
128.08:324:30
138.08:334:30
148.08:334:31
157.98:344:31
167.98:354:31
177.98:364:31
187.98:364:31
197.98:374:32
207.98:384:32
217.98:384:32
227.98:394:33
237.98:394:33
247.98:394:34
257.98:404:34
267.98:404:35
277.98:404:36
287.98:414:36
297.98:414:37
308.08:414:38
318.08:414:39

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.66 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.66 kWh/m² to a high of 5.46 kWh/m² in June across the year — December's 0.66 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.8Dim
20.8Dim
30.8Dim
40.7Dim
50.7Dim
60.7Dim
70.7Dim
80.7Dim
90.7Dim
100.7Dim
110.7Dim
120.7Dim
130.7Dim
140.7Dim
150.7Dim
160.7Dim
170.7Dim
180.6Dim
190.6Dim
200.6Dim
210.6Dim
220.6Dim
230.6Dim
240.6Dim
250.6Dim
260.6Dim
270.6Dim
280.6Dim
290.7Dim
300.7Dim
310.7Dim
Planning a trip in December

Is December a good time to visit Arlon?

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 Arlon.

What to pack for Arlon in December

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

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

a warm layerrain geara heavy coat

UV index in Arlon 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 Arlon peaks around July 16 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 16UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr5Moderate
May6High
Jun7High
Jul7Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Arlon 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 Arlon is worst in April — around 16 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1516 µg/m³Dec 109 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar15Moderate
Apr16Moderate
May14Moderate
Jun14Moderate
Jul12Moderate
Aug12Moderate
Sep12Moderate
Oct10Good
Nov9Good
Dec9Good
Location & terrain

Where is Arlon?

Arlon sits at 49.7°N, 5.8°E, 421 m above sea level, in Belgium. The nearest listed city is Esch-sur-Alzette, 24 km away.

Esch-sur-AlzetteLuxembourgDudelangeThionvilleYutzKonz

Topography around Arlon

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

Within 3 km, the terrain around Arlon has only modest variations in elevation — a maximum elevation change of 176 m around an average of 382 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 288 m; within 80 km, large variations in elevation — a maximum elevation change of 613 m.

The land around Arlon is covered by trees (40%) and grassland (30%) within 3 km, trees (46%) and grassland (34%) within 16 km, and trees (49%), grassland (25%) and cropland (22%) within 80 km.

3 km
176 m
16 km
288 m
80 km
613 m
treesgrasslandcroplandartificial surfaces
December weather nearby: Esch-sur-Alzette 24 km · Luxembourg 24 km · Dudelange 30 km · Hayange 43 km · Thionville 44 km · Yutz 45 km · Konz 55 km · Trier 60 km

Belgium travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 81% of US
price level, 2025
GDP per capita
$60,750
2025
Happiness
6.9 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2021
Road deaths
5.8
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 608
Religion
Roman Catholic 57%nonbeliever/agnostic 20%atheist 9%Muslim 7%

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 Arlon (49.6833°, 5.8167°, elevation 421 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).