Castelnau-le-Lez weather in December

In December, Castelnau-le-Lez sees average daytime highs of 12°C and overnight lows near 4°C, with 72 mm of precipitation across 8.6 wet days and about 8.8 hours of daylight. It is the 11th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 12°C through the month. The sky is clear or mostly clear about 41% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 hours at the start of December to 8 h 48 min by month's end. Set against the rest of the year, December is Castelnau-le-Lez's 9th-clearest and 5th-windiest month. For the whole year in context, see Castelnau-le-Lez's year-round climate.

Daytime high
12°
11th warmest
Overnight low
3rd coldest
Precipitation
72 mm
8.6 wet days
Daylight
8 h 48 min
8:18 AM – 5:04 PM
Cloud cover
52%
9th clearest
Wind
11 km/h
5th windiest
Solar energy
1.51 kWh/m²
Travel score
3.2
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 12°C through the month.

A typical December day in Castelnau-le-Lez reaches about 12°C in the afternoon and slips back to 4°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 15°C. Set against its neighbours, December runs about 3°C cooler than November and on par with January.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1135
2135
3125
4125
5125
6125
7124
8124
9124
10124
11124
12124
13124
14124
15124
16124
17124
18114
19114
20114
21114
22114
23114
24114
25114
26114
27114
28114
29113
30113
31113

How December really feels in Castelnau-le-Lez

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 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
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Castelnau-le-Lez weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan11° / 748.30.99.12.9
Feb13° / 456.10.510.23.8
Mar16° / 566.50.111.65.6
Apr19° / 759013.26.3
May23° / 12°618.2014.57.1
Jun27° / 16°376015.27.1
Jul30° / 18°243.6014.95.9
Aug30° / 18°415.2013.86.0
Sep25° / 15°1116.9012.37.5
Oct20° / 11°13611010.86.3
Nov15° / 12010.509.54.5
Dec12° / 728.60.38.83.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35545
45545
55743
65743
75743
85743
95743
105743
115644
125644
135644
145644
155545
165446
175446
185347
195248
205248
215248
225248
235248
245248
255248
265248
275347
285347
295347
305347
315347

Chance of precipitation in December

Any precipitationSnow

Castelnau-le-Lez gets around 72 mm of rain and snow over 8.6 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 28% and peaks near 32% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1320
2310
3300
4300
5290
6290
7280
8281
9281
10281
11281
12281
13281
14281
15281
16281
17281
18281
19281
20281
21281
22271
23271
24271
25271
26271
27272
28272
29262
30262
31272

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 (%)Comfortable (%)
1982
2982
3982
4991
5991
6991
7991
8991
9991
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 hours at the start of December to 8 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 8:04 AM to 8:24 AM, and sunset from 5:04 PM to 5:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.08:045:04
29.08:055:04
38.98:075:03
48.98:085:03
58.98:085:03
68.98:095:03
78.98:105:03
88.98:115:03
98.88:125:03
108.88:135:03
118.88:145:03
128.88:155:03
138.88:155:03
148.88:165:03
158.88:175:03
168.88:185:04
178.88:185:04
188.88:195:04
198.78:195:04
208.78:205:05
218.78:215:05
228.78:215:06
238.78:215:06
248.78:225:07
258.78:225:07
268.88:235:08
278.88:235:08
288.88:235:09
298.88:235:10
308.88:245:11
318.88:245:11

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.51 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.51 kWh/m² to a high of 7.13 kWh/m² in July across the year — December's 1.51 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.6Dim
21.6Dim
31.6Dim
41.6Dim
51.6Dim
61.6Dim
71.6Dim
81.6Dim
91.6Dim
101.6Dim
111.5Dim
121.5Dim
131.5Dim
141.5Dim
151.5Dim
161.5Dim
171.5Dim
181.5Dim
191.5Dim
201.5Dim
211.5Dim
221.5Dim
231.5Dim
241.5Dim
251.5Dim
261.5Dim
271.5Dim
281.5Dim
291.5Dim
301.5Dim
311.5Dim
Planning a trip in December

Hazard calendar for Castelnau-le-Lez

In seasonPeak

In December, Castelnau-le-Lez sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Castelnau-le-Lez's rainy season runs September–January, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Castelnau-le-Lez?

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

3.2
Sightseeing
11th-best month of the year
0.0
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Castelnau-le-Lez.

What to pack for Castelnau-le-Lez in December

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

In December, Castelnau-le-Lez sees daytime highs around 12°C and nights near 4°C. Pack a warm layer. Worth having: rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Castelnau-le-Lez in December

The nearest coast averages about 14°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 29 km away) is warmest in August at about 22°C and coldest in February near 12°C.

It's comfortable for a long swim from Jun 26 to Sep 17 — about 2.8 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb12Bracing
Mar12Bracing
Apr14Bracing
May16Cool
Jun19Cool
Jul21Refreshing
Aug22Refreshing
Sep20Refreshing
Oct18Cool
Nov16Cool
Dec14Bracing

UV index in Castelnau-le-Lez 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 Castelnau-le-Lez peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 9Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul9Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Castelnau-le-Lez?

Castelnau-le-Lez sits at 43.6°N, 3.9°E, 59 m above sea level, in France. The nearest listed city is Montpellier, 3.0 km away.

Topography around Castelnau-le-Lez

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Castelnau-le-Lez.

Within 3 km, the terrain around Castelnau-le-Lez has only modest variations in elevation — a maximum elevation change of 111 m around an average of 49 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 328 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,562 m.

The land around Castelnau-le-Lez is covered by artificial surfaces (44%) and trees (41%) within 3 km, trees (38%) within 16 km, and trees (41%) and water (26%) within 80 km.

3 km
111 m
16 km
328 m
80 km
1,562 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Montpellier 3.0 km · Lattes 8.0 km · Mauguio 9.0 km · Lunel 19 km · Frontignan 24 km · Sète 31 km · Nîmes 43 km · Agde 50 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 Castelnau-le-Lez (43.636°, 3.9014°, elevation 59 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).