Saint-Herblain weather in December

In December, Saint-Herblain sees average daytime highs of 10°C and overnight lows near 4°C, with 78 mm of precipitation across 11.7 wet days and about 8.4 hours of daylight. It is the 11th-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 17% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 36 min at the start of December to 8 h 18 min by month's end. Set against the rest of the year, December is Saint-Herblain's 11th-clearest and 2nd-windiest month. For the whole year in context, see Saint-Herblain's year-round climate.

Daytime high
10°
11th warmest
Overnight low
3rd coldest
Precipitation
78 mm
11.7 wet days
Daylight
8 h 18 min
8:54 AM – 5:12 PM
Cloud cover
71%
11th clearest
Wind
16 km/h
2nd windiest
Solar energy
0.98 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 Saint-Herblain reaches about 10°C in the afternoon and slips back to 4°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 4°C and 14°C. Set against its neighbours, December runs about 3°C cooler than November and on par with January.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
1115
2105
3105
4105
5105
6105
7105
8105
9105
10104
11104
12104
13104
14104
15104
16104
1794
1894
1994
2094
2194
2294
2394
2494
2594
2694
2794
2894
2994
3094
3194

How December really feels in Saint-Herblain

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.

Saint-Herblain 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 daysDaylight (hours)Travel score
Jan / 7011.58.71.7
Feb10° / 549.4102.1
Mar13° / 521011.63.4
Apr15° / 5510.313.34.6
May19° / 10°5810.414.85.8
Jun22° / 13°448.215.66.7
Jul24° / 15°407.115.37.4
Aug24° / 15°467.4147.4
Sep21° / 12°487.212.46.9
Oct17° / 10°7211.310.65.1
Nov12° / 7011.49.13.2
Dec10° / 7811.78.41.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 70%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
23169
33268
43367
53367
63466
73466
83367
93466
103367
113367
123268
133169
143169
153070
162971
172971
182872
192872
202872
212872
222773
232674
242674
252674
262674
272674
282773
292773
302674
312674

Chance of precipitation in December

Any precipitation

Saint-Herblain gets around 78 mm of rain and snow over 11.7 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 37% and peaks near 41% on the wettest days, and about 0 day brings snow. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
335
434
534
634
734
834
934
1035
1135
1235
1336
1436
1537
1637
1738
1838
1939
2039
2140
2240
2340
2441
2541
2641
2741
2841
2941
3041
3141

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 (%)
1991
2991
3991
4991
51000
61000
71000
81000
91000
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 16 km/h in December.

Across December, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light 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
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 36 min at the start of December to 8 h 18 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 8:39 AM to 9:00 AM, and sunset from 5:13 PM to 5:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.68:395:13
28.58:415:13
38.58:425:13
48.58:435:12
58.58:445:12
68.48:455:12
78.48:465:12
88.48:475:11
98.48:485:11
108.48:495:11
118.48:505:11
128.38:515:11
138.38:515:11
148.38:525:11
158.38:535:12
168.38:545:12
178.38:545:12
188.38:555:12
198.38:565:13
208.38:565:13
218.38:575:13
228.38:575:14
238.38:585:14
248.38:585:15
258.38:595:15
268.38:595:16
278.38:595:17
288.38:595:17
298.39:005:18
308.39:005:19
318.39:005:20

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.98 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.98 kWh/m² to a high of 5.94 kWh/m² in June across the year — December's 0.98 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.1Dim
21.1Dim
31.1Dim
41.1Dim
51.1Dim
61.1Dim
71.0Dim
81.0Dim
91.0Dim
101.0Dim
111.0Dim
121.0Dim
131.0Dim
141.0Dim
151.0Dim
161.0Dim
171.0Dim
180.9Dim
190.9Dim
200.9Dim
210.9Dim
220.9Dim
230.9Dim
240.9Dim
250.9Dim
260.9Dim
270.9Dim
280.9Dim
290.9Dim
300.9Dim
311.0Dim
Planning a trip in December

Is December a good time to visit Saint-Herblain?

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

1.9
Sightseeing
11th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Saint-Herblain.

What to pack for Saint-Herblain in December

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

In December, Saint-Herblain sees daytime highs around 10°C and nights near 4°C. Pack a warm layer. Worth having: rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Saint-Herblain in December

The nearest coast averages about 11°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 37 km away) is warmest in August at about 19°C and coldest in February near 9°C.

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

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan10Bracing
Feb9Bracing
Mar10Bracing
Apr12Bracing
May14Bracing
Jun17Cool
Jul18Cool
Aug19Cool
Sep17Cool
Oct16Cool
Nov14Bracing
Dec11Bracing

UV index in Saint-Herblain 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 Saint-Herblain peaks around August 10 at about 7 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 10UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5High
May6High
Jun7High
Jul7High
Aug7High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Saint-Herblain?

Saint-Herblain sits at 47.2°N, 1.7°W, 23 m above sea level, in France. The nearest listed city is Bouguenais, 4.0 km away.

Topography around Saint-Herblain

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

Within 3 km, the terrain around Saint-Herblain has only modest variations in elevation — a maximum elevation change of 68 m around an average of 26 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 165 m; within 80 km, significant variations in elevation — a maximum elevation change of 340 m.

The land around Saint-Herblain is covered by artificial surfaces (36%), trees (35%) and grassland (23%) within 3 km, grassland (35%) and trees (31%) within 16 km, and cropland (32%) and grassland (31%) within 80 km.

3 km
68 m
16 km
165 m
80 km
340 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Bouguenais 4.0 km · Couëron 6.0 km · Rezé 7.0 km · Orvault 7.0 km · Nantes 7.0 km · Saint-Sébastien-sur-Loire 11 km · La Chapelle-sur-Erdre 12 km · Vertou 14 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 Saint-Herblain (47.2115°, -1.651°, elevation 23 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).