Lannion weather in December

In December, Lannion sees average daytime highs of 10°C and overnight lows near 8°C, with 128 mm of precipitation across 17.5 wet days and about 8.1 hours of daylight. It is the 9th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 10°C through the month. The sky is clear or mostly clear about 10% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 24 min at the start of December to 8 h 06 min by month's end. Set against the rest of the year, December is Lannion's 11th-clearest and 1st-windiest month. For the whole year in context, see Lannion's year-round climate.

Daytime high
10°
9th warmest
Overnight low
4th coldest
Precipitation
128 mm
17.5 wet days
Daylight
8 h 06 min
9:08 AM – 5:12 PM
Cloud cover
74%
11th clearest
Wind
27 km/h
1st windiest
Solar energy
0.86 kWh/m²
Travel score
1.9
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 10°C through the month.

A typical December day in Lannion reaches about 10°C in the afternoon and slips back to 8°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 13°C. Set against its neighbours, December runs about 2°C cooler than November and about 1°C warmer than January.

10°15°151015202531
Avg high (°C)Avg low (°C)
1119
2118
3118
4118
5118
6118
7118
8118
9108
10108
11108
12108
13108
14108
15108
16108
17108
18108
19108
20108
21107
22107
23107
24107
25107
26107
27107
28107
29107
30107
31107

Lannion weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan / 10416.48.51.7
Feb / 8714.29.81.6
Mar10° / 7013.311.62.1
Apr12° / 7011.713.42.8
May14° / 11°5910.4153.9
Jun16° / 13°488.715.95.1
Jul18° / 15°42915.56.0
Aug18° / 15°509.514.26.1
Sep17° / 14°551012.45.5
Oct15° / 12°971510.54.0
Nov12° / 10°11617.392.6
Dec10° / 12817.58.11.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 73%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
23070
33070
43070
53070
63070
73070
83070
93070
102971
112971
122773
132773
142674
152674
162575
172575
182575
192476
202575
212575
222575
232575
242575
252575
262674
272674
282674
292674
302674
312674

Chance of precipitation in December

Any precipitation

Lannion gets around 128 mm of rain and snow over 17.5 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 56% and peaks near 58% on the wettest days, and about 0 day brings snow.

0%20%40%60%151015202531
Rain chance (%)
158
258
358
457
557
656
756
855
955
1055
1155
1255
1355
1455
1555
1655
1756
1856
1956
2056
2157
2257
2357
2457
2557
2657
2757
2857
2957
3057
3157

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 27 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 26 km/h on the calmest days to 27 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
126breezy
226breezy
326breezy
426breezy
526breezy
626breezy
727breezy
827breezy
927breezy
1027breezy
1127breezy
1227breezy
1327breezy
1427breezy
1527breezy
1627breezy
1727breezy
1827breezy
1927breezy
2027breezy
2127breezy
2227breezy
2327breezy
2427breezy
2527breezy
2627breezy
2727breezy
2827breezy
2927breezy
3027breezy
3127breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 24 min at the start of December to 8 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over December. Sunrise moves from 8:53 AM to 9:14 AM, and sunset from 5:14 PM to 5:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.48:535:14
28.38:545:14
38.38:555:14
48.38:565:13
58.38:575:13
68.28:595:13
78.29:005:12
88.29:015:12
98.29:025:12
108.29:035:12
118.19:045:12
128.19:045:12
138.19:055:12
148.19:065:12
158.19:075:12
168.19:085:12
178.19:085:13
188.19:095:13
198.19:105:13
208.19:105:14
218.19:115:14
228.19:115:14
238.19:125:15
248.19:125:15
258.19:125:16
268.19:135:17
278.19:135:17
288.19:135:18
298.19:135:19
308.19:145:19
318.19:145:20

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.86 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.86 kWh/m² to a high of 6.03 kWh/m² in June across the year — December's 0.86 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.0Dim
21.0Dim
30.9Dim
40.9Dim
50.9Dim
60.9Dim
70.9Dim
80.9Dim
90.9Dim
100.9Dim
110.9Dim
120.9Dim
130.9Dim
140.8Dim
150.8Dim
160.8Dim
170.8Dim
180.8Dim
190.8Dim
200.8Dim
210.8Dim
220.8Dim
230.8Dim
240.8Dim
250.8Dim
260.8Dim
270.8Dim
280.8Dim
290.8Dim
300.9Dim
310.9Dim
Planning a trip in December

Is December a good time to visit Lannion?

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

1.9
Sightseeing
10th-best month of the year
0.0
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Lannion.

What to pack for Lannion in December

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

In December, Lannion sees daytime highs around 10°C and nights near 8°C. Pack a warm layer and rain gear. Worth having: a windbreaker. About 18 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Lannion in December

The nearest coast averages about 12°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 17 km away) is warmest in August at about 17°C and coldest in March near 9°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan11Bracing
Feb10Bracing
Mar9Bracing
Apr10Bracing
May12Bracing
Jun14Bracing
Jul16Cool
Aug17Cool
Sep17Cool
Oct16Cool
Nov14Bracing
Dec12Bracing

UV index in Lannion 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 Lannion peaks around August 12 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 11 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 12UV 7Jan 11UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr5Moderate
May6High
Jun7High
Jul6High
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Lannion?

Lannion sits at 48.7°N, 3.5°W, 30 m above sea level, in France. The nearest listed city is Morlaix, 32 km away.

Topography around Lannion

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

Within 3 km, the terrain around Lannion has only modest variations in elevation — a maximum elevation change of 108 m around an average of 63 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 186 m; within 80 km, significant variations in elevation — a maximum elevation change of 381 m.

The land around Lannion is covered by trees (41%) and grassland (23%) within 3 km, trees (27%), water (27%) and cropland (23%) within 16 km, and water (41%), cropland (22%) and trees (21%) within 80 km.

3 km
108 m
16 km
186 m
80 km
381 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Morlaix 32 km · Saint-Brieuc 56 km · Landerneau 66 km · Pontivy 82 km · Brest 85 km · Quimper 95 km · Douarnenez 96 km · Concarneau 101 km

France travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 77% of US
price level, 2025
GDP per capita
$48,986
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.3
per 100k, 2023
Road deaths
5.1
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 539
Religion
Roman Catholic 47%none 33%Muslim 4%Protestant 2%

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 Lannion (48.7326°, -3.4566°, elevation 30 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).