Grenoble weather in December
In December, Grenoble sees average daytime highs of 4°C and overnight lows near -3°C, with 133 mm of precipitation across 13.4 wet days and about 8.6 hours of daylight. It is the 11th-warmest and 3rd-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 25% of the time in December, and the air most often feels dry.
Daylight stretches from about 8 h 48 min at the start of December to 8 h 36 min by month's end. Set against the rest of the year, December is Grenoble's 10th-clearest and 8th-windiest month. For the whole year in context, see Grenoble's year-round climate.
- Daytime high
- 4°
- 11th warmest
- Overnight low
- -3°
- 3rd coldest
- Precipitation
- 133 mm
- 13.4 wet days
- Daylight
- 8 h 36 min
- 8:16 AM – 4:50 PM
- Cloud cover
- 64%
- 10th clearest
- Wind
- 5 km/h
- 8th windiest
- Solar energy
- 1.29 kWh/m²
- Travel score
- 0.0
- out of 10
Grenoble is commune in Isère, France.
- Air quality
- Moderate
- PM2.5 10.9 µg/m³ · 2019
- Density
- 8,745/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 4°C through the month.
A typical December day in Grenoble reaches about 4°C in the afternoon and slips back to -3°C overnight — a 7°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 4°C cooler than November and on par with January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Avg low (°C) | -2 | -2 | -2 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -3 | -4 | -4 | -4 | -4 | -4 | -4 | -4 | -4 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 5 | -2 |
| 2 | 5 | -2 |
| 3 | 5 | -2 |
| 4 | 5 | -3 |
| 5 | 4 | -3 |
| 6 | 4 | -3 |
| 7 | 4 | -3 |
| 8 | 4 | -3 |
| 9 | 4 | -3 |
| 10 | 4 | -3 |
| 11 | 4 | -3 |
| 12 | 4 | -3 |
| 13 | 4 | -3 |
| 14 | 4 | -3 |
| 15 | 4 | -3 |
| 16 | 4 | -3 |
| 17 | 4 | -3 |
| 18 | 4 | -3 |
| 19 | 4 | -3 |
| 20 | 4 | -3 |
| 21 | 3 | -3 |
| 22 | 3 | -3 |
| 23 | 3 | -3 |
| 24 | 3 | -4 |
| 25 | 3 | -4 |
| 26 | 3 | -4 |
| 27 | 3 | -4 |
| 28 | 3 | -4 |
| 29 | 3 | -4 |
| 30 | 3 | -4 |
| 31 | 3 | -4 |
How December really feels in Grenoble
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.
The story in December is cold — wind chill drags the overnight "feels like" below the raw low.
Grenoble weather by month
How December compares with the rest of the year at a glance. December is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 3° / -4° | 119 | 13.1 | 10.8 | 9 | 0.0 |
| Feb | 5° / -4° | 102 | 11.1 | 9.2 | 10.1 | 0.1 |
| Mar | 9° / -0° | 109 | 12.9 | 8.3 | 11.6 | 1.7 |
| Apr | 12° / 3° | 120 | 14.3 | 6.6 | 13.2 | 2.8 |
| May | 16° / 7° | 147 | 16.8 | 2.2 | 14.6 | 4.3 |
| Jun | 20° / 10° | 127 | 15.3 | 0.1 | 15.4 | 5.6 |
| Jul | 23° / 12° | 113 | 12.8 | 0.1 | 15.1 | 6.6 |
| Aug | 22° / 12° | 107 | 12 | 0 | 13.9 | 6.7 |
| Sep | 18° / 8° | 111 | 11.7 | 0.4 | 12.3 | 5.6 |
| Oct | 14° / 5° | 118 | 12.7 | 2.5 | 10.7 | 3.7 |
| Nov | 8° / -0° | 141 | 13.5 | 7.5 | 9.3 | 1.0 |
| Dec | 4° / -3° | 133 | 13.4 | 10.5 | 8.6 | 0.0 |
Cloud cover in December
The sky is clear or mostly clear about 25% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 61%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 40 | 40 | 40 | 40 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 39 | 38 | 38 | 38 |
| Cloudier (%) | 61 | 61 | 61 | 61 | 61 | 61 | 61 | 61 | 60 | 60 | 60 | 60 | 59 | 59 | 59 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 61 | 61 | 61 | 61 | 62 | 62 | 62 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 39 | 61 |
| 2 | 39 | 61 |
| 3 | 39 | 61 |
| 4 | 39 | 61 |
| 5 | 39 | 61 |
| 6 | 39 | 61 |
| 7 | 39 | 61 |
| 8 | 39 | 61 |
| 9 | 40 | 60 |
| 10 | 40 | 60 |
| 11 | 40 | 60 |
| 12 | 40 | 60 |
| 13 | 41 | 59 |
| 14 | 41 | 59 |
| 15 | 41 | 59 |
| 16 | 40 | 60 |
| 17 | 40 | 60 |
| 18 | 40 | 60 |
| 19 | 40 | 60 |
| 20 | 40 | 60 |
| 21 | 40 | 60 |
| 22 | 40 | 60 |
| 23 | 40 | 60 |
| 24 | 40 | 60 |
| 25 | 39 | 61 |
| 26 | 39 | 61 |
| 27 | 39 | 61 |
| 28 | 39 | 61 |
| 29 | 38 | 62 |
| 30 | 38 | 62 |
| 31 | 38 | 62 |
Chance of precipitation in December
Grenoble gets around 133 mm of rain and snow over 13.4 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 44% and peaks near 44% on the wettest days, and about 11 days bring snow.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 44 |
| Snow chance (%) | 33 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 34 | 34 | 34 | 35 | 35 | 35 | 35 | 36 | 36 | 36 | 36 | 36 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 44 | 33 |
| 2 | 44 | 34 |
| 3 | 44 | 34 |
| 4 | 44 | 34 |
| 5 | 44 | 34 |
| 6 | 44 | 34 |
| 7 | 44 | 34 |
| 8 | 44 | 34 |
| 9 | 44 | 34 |
| 10 | 44 | 34 |
| 11 | 44 | 34 |
| 12 | 44 | 34 |
| 13 | 44 | 34 |
| 14 | 44 | 34 |
| 15 | 44 | 33 |
| 16 | 43 | 33 |
| 17 | 43 | 33 |
| 18 | 43 | 33 |
| 19 | 43 | 33 |
| 20 | 43 | 34 |
| 21 | 43 | 34 |
| 22 | 43 | 34 |
| 23 | 43 | 35 |
| 24 | 43 | 35 |
| 25 | 43 | 35 |
| 26 | 43 | 35 |
| 27 | 43 | 36 |
| 28 | 43 | 36 |
| 29 | 43 | 36 |
| 30 | 43 | 36 |
| 31 | 44 | 36 |
Humidity in December
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.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Dry (%) | |
|---|---|
| 1 | 100 |
| 2 | 100 |
| 3 | 100 |
| 4 | 100 |
| 5 | 100 |
| 6 | 100 |
| 7 | 100 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
| 13 | 100 |
| 14 | 100 |
| 15 | 100 |
| 16 | 100 |
| 17 | 100 |
| 18 | 100 |
| 19 | 100 |
| 20 | 100 |
| 21 | 100 |
| 22 | 100 |
| 23 | 100 |
| 24 | 100 |
| 25 | 100 |
| 26 | 100 |
| 27 | 100 |
| 28 | 100 |
| 29 | 100 |
| 30 | 100 |
| 31 | 100 |
Wind in December
Winds average 5 km/h in December.
Across December, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
| 31 | 5 | calm |
Sunrise & sunset in December
Daylight runs from about 8 h 48 min at the start of December to 8 h 36 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 8:02 AM to 8:22 AM, and sunset from 4:51 PM to 4:58 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 8.8 | 8.8 | 8.8 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 |
| Sunrise (AM) | 8:02 | 8:04 | 8:05 | 8:06 | 8:07 | 8:08 | 8:09 | 8:10 | 8:11 | 8:11 | 8:12 | 8:13 | 8:14 | 8:15 | 8:15 | 8:16 | 8:17 | 8:17 | 8:18 | 8:19 | 8:19 | 8:20 | 8:20 | 8:20 | 8:21 | 8:21 | 8:21 | 8:22 | 8:22 | 8:22 | 8:22 |
| Sunset (PM) | 4:51 | 4:51 | 4:51 | 4:50 | 4:50 | 4:50 | 4:50 | 4:50 | 4:50 | 4:50 | 4:50 | 4:50 | 4:50 | 4:50 | 4:50 | 4:50 | 4:51 | 4:51 | 4:51 | 4:52 | 4:52 | 4:53 | 4:53 | 4:54 | 4:54 | 4:55 | 4:55 | 4:56 | 4:57 | 4:58 | 4:58 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 8.8 | 8:02 | 4:51 |
| 2 | 8.8 | 8:04 | 4:51 |
| 3 | 8.8 | 8:05 | 4:51 |
| 4 | 8.7 | 8:06 | 4:50 |
| 5 | 8.7 | 8:07 | 4:50 |
| 6 | 8.7 | 8:08 | 4:50 |
| 7 | 8.7 | 8:09 | 4:50 |
| 8 | 8.7 | 8:10 | 4:50 |
| 9 | 8.7 | 8:11 | 4:50 |
| 10 | 8.6 | 8:11 | 4:50 |
| 11 | 8.6 | 8:12 | 4:50 |
| 12 | 8.6 | 8:13 | 4:50 |
| 13 | 8.6 | 8:14 | 4:50 |
| 14 | 8.6 | 8:15 | 4:50 |
| 15 | 8.6 | 8:15 | 4:50 |
| 16 | 8.6 | 8:16 | 4:50 |
| 17 | 8.6 | 8:17 | 4:51 |
| 18 | 8.6 | 8:17 | 4:51 |
| 19 | 8.6 | 8:18 | 4:51 |
| 20 | 8.6 | 8:19 | 4:52 |
| 21 | 8.6 | 8:19 | 4:52 |
| 22 | 8.6 | 8:20 | 4:53 |
| 23 | 8.6 | 8:20 | 4:53 |
| 24 | 8.6 | 8:20 | 4:54 |
| 25 | 8.6 | 8:21 | 4:54 |
| 26 | 8.6 | 8:21 | 4:55 |
| 27 | 8.6 | 8:21 | 4:55 |
| 28 | 8.6 | 8:22 | 4:56 |
| 29 | 8.6 | 8:22 | 4:57 |
| 30 | 8.6 | 8:22 | 4:58 |
| 31 | 8.6 | 8:22 | 4:58 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 1.29 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 1.29 kWh/m² to a high of 6.25 kWh/m² in July across the year — December's 1.29 kWh/m² sits near the bottom.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 |
| Level | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 1.4 | Dim |
| 2 | 1.4 | Dim |
| 3 | 1.4 | Dim |
| 4 | 1.4 | Dim |
| 5 | 1.4 | Dim |
| 6 | 1.3 | Dim |
| 7 | 1.3 | Dim |
| 8 | 1.3 | Dim |
| 9 | 1.3 | Dim |
| 10 | 1.3 | Dim |
| 11 | 1.3 | Dim |
| 12 | 1.3 | Dim |
| 13 | 1.3 | Dim |
| 14 | 1.3 | Dim |
| 15 | 1.3 | Dim |
| 16 | 1.3 | Dim |
| 17 | 1.3 | Dim |
| 18 | 1.3 | Dim |
| 19 | 1.3 | Dim |
| 20 | 1.3 | Dim |
| 21 | 1.3 | Dim |
| 22 | 1.3 | Dim |
| 23 | 1.3 | Dim |
| 24 | 1.3 | Dim |
| 25 | 1.3 | Dim |
| 26 | 1.3 | Dim |
| 27 | 1.3 | Dim |
| 28 | 1.3 | Dim |
| 29 | 1.3 | Dim |
| 30 | 1.3 | Dim |
| 31 | 1.3 | Dim |
Is December a good time to visit Grenoble?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a weaker month for outdoor sightseeing in Grenoble.
What to pack for Grenoble in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Grenoble sees daytime highs around 4°C and nights near -3°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 13 days see rain.
UV index in Grenoble in December
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 Grenoble peaks around July 16 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 3 | 4 | 5 | 7 | 7 | 9 | 7 | 5 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | High | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 5 | High |
| May | 7 | High |
| Jun | 7 | Very high |
| Jul | 9 | Very high |
| Aug | 7 | High |
| Sep | 5 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Grenoble?
Grenoble sits at 45.2°N, 5.7°E, 218 m above sea level, in France. The nearest listed city is Fontaine, 3.0 km away.
Topography around Grenoble
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Grenoble.
Within 3 km, the terrain around Grenoble has significant variations in elevation — a maximum elevation change of 440 m around an average of 237 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,062 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,888 m.
The land around Grenoble is covered by artificial surfaces (63%) and trees (29%) within 3 km, trees (68%) within 16 km, and trees (53%) and grassland (27%) within 80 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
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 Grenoble (45.1787°, 5.7148°, elevation 218 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).