Riom weather in December

In December, Riom sees average daytime highs of 7°C and overnight lows near 1°C, with 61 mm of precipitation across 12.3 wet days and about 8.5 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 7°C through the month. The sky is clear or mostly clear about 18% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 42 min at the start of December to 8 h 30 min by month's end. Set against the rest of the year, December is Riom's 10th-clearest and 1st-windiest month. For the whole year in context, see Riom's year-round climate.

Daytime high
11th warmest
Overnight low
3rd coldest
Precipitation
61 mm
12.3 wet days
Daylight
8 h 30 min
8:29 AM – 4:58 PM
Cloud cover
71%
10th clearest
Wind
11 km/h
1st windiest
Solar energy
1.1 kWh/m²
Travel score
0.9
out of 10
Air quality
Excellent
PM10 13.5 µg/m³ · 2019

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 7°C through the month.

A typical December day in Riom reaches about 7°C in the afternoon and slips back to 1°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 1°C and 12°C. Set against its neighbours, December runs about 3°C cooler than November and on par with January.

-10°-5°10°15°151015202531
Avg high (°C)Avg low (°C)
182
282
382
482
582
681
781
871
971
1071
1171
1271
1371
1471
1571
1671
1771
1871
1971
2071
2171
2271
2371
2471
2571
2671
2771
2871
2971
3071
3171

How December really feels in Riom

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.

Riom weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 5912.43.58.90.7
Feb / 48113.3101.2
Mar12° / 54111.211.63.0
Apr15° / 7913.10.613.34.1
May19° / 9314.1014.75.3
Jun22° / 12°7911.9015.56.3
Jul25° / 13°8410.5015.26.9
Aug25° / 13°8510.90146.9
Sep21° / 10°7910.2012.36.3
Oct16° / 7211.20.210.74.8
Nov10° / 7212.71.29.32.2
Dec / 6112.32.58.50.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% 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 (%)
13070
22971
33169
43169
53169
63169
73268
83268
93268
103268
113268
123169
133169
143169
153070
163070
173070
183070
192872
202872
212872
222872
232872
242872
252872
262773
272773
282872
292872
302872
312872

Chance of precipitation in December

Any precipitationSnow

Riom gets around 61 mm of rain and snow over 12.3 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 40% and peaks near 42% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1427
2427
3427
4427
5417
6417
7407
8407
9407
10397
11397
12397
13397
14397
15388
16388
17388
18388
19399
20399
21399
223910
233910
243910
254010
264010
274010
284010
293910
303910
313910

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

Across December, daily wind ranges from about 11 km/h on the calmest days to 12 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
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 42 min at the start of December to 8 h 30 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 8:15 AM to 8:35 AM, and sunset from 4:59 PM to 5:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.78:154:59
28.78:174:59
38.78:184:58
48.78:194:58
58.68:204:58
68.68:214:58
78.68:224:58
88.68:234:58
98.68:244:57
108.58:254:57
118.58:254:57
128.58:264:57
138.58:274:58
148.58:284:58
158.58:294:58
168.58:294:58
178.58:304:58
188.58:314:59
198.58:314:59
208.58:324:59
218.58:325:00
228.58:335:00
238.58:335:01
248.58:345:01
258.58:345:02
268.58:345:02
278.58:355:03
288.58:355:04
298.58:355:04
308.58:355:05
318.58:355:06

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.1 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.1 kWh/m² to a high of 5.93 kWh/m² in July across the year — December's 1.1 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.2Dim
21.2Dim
31.2Dim
41.2Dim
51.2Dim
61.2Dim
71.1Dim
81.1Dim
91.1Dim
101.1Dim
111.1Dim
121.1Dim
131.1Dim
141.1Dim
151.1Dim
161.1Dim
171.1Dim
181.1Dim
191.1Dim
201.1Dim
211.1Dim
221.1Dim
231.1Dim
241.1Dim
251.1Dim
261.1Dim
271.1Dim
281.1Dim
291.1Dim
301.1Dim
311.1Dim
Planning a trip in December

Is December a good time to visit Riom?

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

0.9
Sightseeing
11th-best month of the year
0.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Riom.

What to pack for Riom in December

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

In December, Riom sees daytime highs around 7°C and nights near 1°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 12 days see rain.

a warm layera heavy coatrain gear

UV index in Riom 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 Riom peaks around July 15 at about 8 (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 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May7High
Jun7Very high
Jul8Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Riom?

Riom sits at 45.9°N, 3.1°E, 362 m above sea level, in France. The nearest listed city is Clermont-Ferrand, 13 km away.

Topography around Riom

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

Within 3 km, the terrain around Riom has only modest variations in elevation — a maximum elevation change of 196 m around an average of 350 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 907 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,675 m.

The land around Riom is covered by cropland (32%), artificial surfaces (27%) and trees (22%) within 3 km, cropland (39%), trees (28%) and grassland (22%) within 16 km, and grassland (46%) and trees (38%) within 80 km.

3 km
196 m
16 km
907 m
80 km
1,675 m
treesgrasslandcroplandartificial surfaces
December weather nearby: Clermont-Ferrand 13 km · Chamalières 14 km · Cournon-d'Auvergne 18 km · Vichy 35 km · Issoire 40 km · Montluçon 63 km · Roanne 76 km · Moulins 77 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 Riom (45.8936°, 3.1126°, elevation 362 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).