Zermatt weather in December
In December, Zermatt sees average daytime highs of -7°C and overnight lows near -14°C, with 102 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.
Highs ease over the month, from about -6°C in the first days to -8°C by the end. The sky is clear or mostly clear about 27% 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 Zermatt's 9th-clearest and 4th-windiest month. For the whole year in context, see Zermatt's year-round climate.
- Daytime high
- -7°
- 11th warmest
- Overnight low
- -14°
- 3rd coldest
- Precipitation
- 102 mm
- 12.3 wet days
- Daylight
- 8 h 30 min
- 8:11 AM – 4:39 PM
- Cloud cover
- 62%
- 9th clearest
- Wind
- 4 km/h
- 4th windiest
- Solar energy
- 1.54 kWh/m²
- Travel score
- 0.0
- out of 10
Zermatt is municipality in Visp district, canton of Valais, Switzerland.
- Density
- 27/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Highs ease over the month, from about -6°C in the first days to -8°C by the end.
A typical December day in Zermatt reaches about -7°C in the afternoon and slips back to -14°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between -13°C and -2°C. Set against its neighbours, December runs about 5°C cooler than November and about 1°C warmer than 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) | -6 | -6 | -6 | -6 | -6 | -6 | -6 | -7 | -7 | -7 | -7 | -7 | -7 | -7 | -7 | -7 | -7 | -7 | -7 | -7 | -8 | -8 | -8 | -8 | -8 | -8 | -8 | -8 | -8 | -8 | -8 |
| Avg low (°C) | -12 | -12 | -12 | -13 | -13 | -13 | -13 | -13 | -13 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 | -14 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | -6 | -12 |
| 2 | -6 | -12 |
| 3 | -6 | -12 |
| 4 | -6 | -13 |
| 5 | -6 | -13 |
| 6 | -6 | -13 |
| 7 | -6 | -13 |
| 8 | -7 | -13 |
| 9 | -7 | -13 |
| 10 | -7 | -14 |
| 11 | -7 | -14 |
| 12 | -7 | -14 |
| 13 | -7 | -14 |
| 14 | -7 | -14 |
| 15 | -7 | -14 |
| 16 | -7 | -14 |
| 17 | -7 | -14 |
| 18 | -7 | -14 |
| 19 | -7 | -14 |
| 20 | -7 | -14 |
| 21 | -8 | -14 |
| 22 | -8 | -14 |
| 23 | -8 | -14 |
| 24 | -8 | -14 |
| 25 | -8 | -14 |
| 26 | -8 | -14 |
| 27 | -8 | -14 |
| 28 | -8 | -14 |
| 29 | -8 | -14 |
| 30 | -8 | -14 |
| 31 | -8 | -14 |
How December really feels in Zermatt
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.
Zermatt 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.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -8° / -15° | 100 | 12.1 | 13.1 | 8.9 | 0.0 |
| Feb | -6° / -14° | 80 | 11.2 | 12.2 | 10 | 0.0 |
| Mar | -2° / -10° | 90 | 12.2 | 13.6 | 11.6 | 0.0 |
| Apr | 1° / -6° | 144 | 15 | 15.1 | 13.3 | 0.0 |
| May | 6° / -1° | 187 | 18.5 | 12.3 | 14.7 | 0.4 |
| Jun | 11° / 3° | 173 | 19.5 | 4.4 | 15.5 | 2.2 |
| Jul | 14° / 5° | 188 | 19.6 | 1 | 15.2 | 3.2 |
| Aug | 13° / 4° | 184 | 19.4 | 1.3 | 14 | 3.0 |
| Sep | 10° / 1° | 137 | 15.5 | 4.8 | 12.3 | 1.8 |
| Oct | 5° / -3° | 130 | 11.7 | 8.8 | 10.7 | 0.2 |
| Nov | -2° / -9° | 173 | 13.7 | 14.4 | 9.2 | 0.0 |
| Dec | -7° / -14° | 102 | 12.3 | 13.4 | 8.5 | 0.0 |
Cloud cover in December
The sky is clear or mostly clear about 27% 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 60%.
| 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 (%) | 37 | 36 | 37 | 37 | 37 | 37 | 38 | 38 | 38 | 40 | 40 | 40 | 41 | 42 | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 41 | 41 | 41 | 41 | 40 | 40 | 40 |
| Cloudier (%) | 63 | 64 | 63 | 63 | 63 | 63 | 62 | 62 | 62 | 60 | 60 | 60 | 59 | 58 | 59 | 59 | 58 | 58 | 58 | 58 | 58 | 58 | 58 | 58 | 59 | 59 | 59 | 59 | 60 | 60 | 60 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 37 | 63 |
| 2 | 36 | 64 |
| 3 | 37 | 63 |
| 4 | 37 | 63 |
| 5 | 37 | 63 |
| 6 | 37 | 63 |
| 7 | 38 | 62 |
| 8 | 38 | 62 |
| 9 | 38 | 62 |
| 10 | 40 | 60 |
| 11 | 40 | 60 |
| 12 | 40 | 60 |
| 13 | 41 | 59 |
| 14 | 42 | 58 |
| 15 | 41 | 59 |
| 16 | 41 | 59 |
| 17 | 42 | 58 |
| 18 | 42 | 58 |
| 19 | 42 | 58 |
| 20 | 42 | 58 |
| 21 | 42 | 58 |
| 22 | 42 | 58 |
| 23 | 42 | 58 |
| 24 | 42 | 58 |
| 25 | 41 | 59 |
| 26 | 41 | 59 |
| 27 | 41 | 59 |
| 28 | 41 | 59 |
| 29 | 40 | 60 |
| 30 | 40 | 60 |
| 31 | 40 | 60 |
Chance of precipitation in December
Zermatt gets around 102 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 13 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 (%) | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 42 | 41 | 41 | 41 | 40 | 40 | 40 | 39 | 39 | 39 | 38 | 38 | 38 | 38 | 39 | 39 | 39 | 40 | 40 |
| Snow chance (%) | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 44 | 44 | 44 | 43 | 43 | 43 | 43 | 42 | 42 | 42 | 42 | 42 | 43 | 43 | 43 | 43 | 44 | 44 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 41 | 45 |
| 2 | 41 | 45 |
| 3 | 41 | 45 |
| 4 | 41 | 45 |
| 5 | 41 | 45 |
| 6 | 41 | 45 |
| 7 | 41 | 45 |
| 8 | 42 | 45 |
| 9 | 42 | 45 |
| 10 | 42 | 45 |
| 11 | 42 | 45 |
| 12 | 42 | 45 |
| 13 | 42 | 45 |
| 14 | 41 | 44 |
| 15 | 41 | 44 |
| 16 | 41 | 44 |
| 17 | 40 | 43 |
| 18 | 40 | 43 |
| 19 | 40 | 43 |
| 20 | 39 | 43 |
| 21 | 39 | 42 |
| 22 | 39 | 42 |
| 23 | 38 | 42 |
| 24 | 38 | 42 |
| 25 | 38 | 42 |
| 26 | 38 | 43 |
| 27 | 39 | 43 |
| 28 | 39 | 43 |
| 29 | 39 | 43 |
| 30 | 40 | 44 |
| 31 | 40 | 44 |
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 4 km/h in December.
Across December, daily wind ranges from about 4 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) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 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 | 4 | calm |
| 2 | 4 | calm |
| 3 | 4 | calm |
| 4 | 4 | calm |
| 5 | 4 | calm |
| 6 | 4 | calm |
| 7 | 4 | calm |
| 8 | 4 | calm |
| 9 | 4 | calm |
| 10 | 4 | calm |
| 11 | 4 | calm |
| 12 | 4 | calm |
| 13 | 4 | calm |
| 14 | 4 | calm |
| 15 | 4 | calm |
| 16 | 4 | calm |
| 17 | 4 | calm |
| 18 | 4 | calm |
| 19 | 4 | calm |
| 20 | 4 | calm |
| 21 | 4 | calm |
| 22 | 4 | calm |
| 23 | 4 | 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 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 7:57 AM to 8:17 AM, and sunset from 4:40 PM to 4:47 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) | 8.7 | 8.7 | 8.7 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.4 | 8.4 | 8.4 | 8.4 | 8.4 | 8.4 | 8.4 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 |
| Sunrise (AM) | 7:57 | 7:58 | 8:00 | 8:01 | 8:02 | 8:03 | 8:04 | 8:05 | 8:06 | 8:07 | 8:07 | 8:08 | 8:09 | 8:10 | 8:11 | 8:11 | 8:12 | 8:13 | 8:13 | 8:14 | 8:14 | 8:15 | 8:15 | 8:16 | 8:16 | 8:16 | 8:17 | 8:17 | 8:17 | 8:17 | 8:17 |
| Sunset (PM) | 4:40 | 4:40 | 4:39 | 4:39 | 4:39 | 4:39 | 4:39 | 4:38 | 4:38 | 4:38 | 4:38 | 4:38 | 4:39 | 4:39 | 4:39 | 4:39 | 4:39 | 4:40 | 4:40 | 4:40 | 4:41 | 4:41 | 4:42 | 4:42 | 4:43 | 4:43 | 4:44 | 4:45 | 4:45 | 4:46 | 4:47 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 8.7 | 7:57 | 4:40 |
| 2 | 8.7 | 7:58 | 4:40 |
| 3 | 8.7 | 8:00 | 4:39 |
| 4 | 8.6 | 8:01 | 4:39 |
| 5 | 8.6 | 8:02 | 4:39 |
| 6 | 8.6 | 8:03 | 4:39 |
| 7 | 8.6 | 8:04 | 4:39 |
| 8 | 8.6 | 8:05 | 4:38 |
| 9 | 8.5 | 8:06 | 4:38 |
| 10 | 8.5 | 8:07 | 4:38 |
| 11 | 8.5 | 8:07 | 4:38 |
| 12 | 8.5 | 8:08 | 4:38 |
| 13 | 8.5 | 8:09 | 4:39 |
| 14 | 8.5 | 8:10 | 4:39 |
| 15 | 8.5 | 8:11 | 4:39 |
| 16 | 8.5 | 8:11 | 4:39 |
| 17 | 8.5 | 8:12 | 4:39 |
| 18 | 8.5 | 8:13 | 4:40 |
| 19 | 8.4 | 8:13 | 4:40 |
| 20 | 8.4 | 8:14 | 4:40 |
| 21 | 8.4 | 8:14 | 4:41 |
| 22 | 8.4 | 8:15 | 4:41 |
| 23 | 8.4 | 8:15 | 4:42 |
| 24 | 8.4 | 8:16 | 4:42 |
| 25 | 8.4 | 8:16 | 4:43 |
| 26 | 8.5 | 8:16 | 4:43 |
| 27 | 8.5 | 8:17 | 4:44 |
| 28 | 8.5 | 8:17 | 4:45 |
| 29 | 8.5 | 8:17 | 4:45 |
| 30 | 8.5 | 8:17 | 4:46 |
| 31 | 8.5 | 8:17 | 4:47 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 1.54 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 1.54 kWh/m² to a high of 6.43 kWh/m² in June across the year — December's 1.54 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) | 1.7 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.6 | 1.6 | 1.6 |
| 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 | 1.7 | Dim |
| 2 | 1.6 | Dim |
| 3 | 1.6 | Dim |
| 4 | 1.6 | Dim |
| 5 | 1.6 | Dim |
| 6 | 1.6 | Dim |
| 7 | 1.6 | Dim |
| 8 | 1.6 | Dim |
| 9 | 1.6 | Dim |
| 10 | 1.6 | Dim |
| 11 | 1.6 | Dim |
| 12 | 1.6 | Dim |
| 13 | 1.5 | Dim |
| 14 | 1.5 | Dim |
| 15 | 1.5 | Dim |
| 16 | 1.5 | Dim |
| 17 | 1.5 | Dim |
| 18 | 1.5 | Dim |
| 19 | 1.5 | Dim |
| 20 | 1.5 | Dim |
| 21 | 1.5 | Dim |
| 22 | 1.5 | Dim |
| 23 | 1.5 | Dim |
| 24 | 1.5 | Dim |
| 25 | 1.5 | Dim |
| 26 | 1.5 | Dim |
| 27 | 1.5 | Dim |
| 28 | 1.5 | Dim |
| 29 | 1.6 | Dim |
| 30 | 1.6 | Dim |
| 31 | 1.6 | Dim |
Is December a good time to visit Zermatt?
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 Zermatt.
What to pack for Zermatt in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Zermatt sees daytime highs around -7°C and nights near -14°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 12 days see rain.
UV index in Zermatt 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 Zermatt peaks around July 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 6 | 7 | 9 | 8 | 9 | 8 | 6 | 4 | 2 | 1 |
| Level | Low | Moderate | High | High | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 6 | High |
| Apr | 7 | High |
| May | 9 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Where is Zermatt?
Zermatt sits at 46.0°N, 7.7°E, 0 m above sea level, in Switzerland. The nearest listed city is Sierre, 34 km away.
Topography around Zermatt
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Zermatt.
Within 3 km, the terrain around Zermatt has very significant variations in elevation — a maximum elevation change of 1,598 m around an average of 2,203 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 3,378 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,639 m.
The land around Zermatt is covered by grassland (47%) and trees (34%) within 3 km, snow and ice (46%) and bare terrain (25%) within 16 km, and trees (43%) and grassland (30%) within 80 km.
Switzerland travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / J
- 230 V · 50 Hz
- Prices
- ≈ 112% of US
- price level, 2025
- GDP per capita
- $114,769
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 0.6
- per 100k, 2023
- Road deaths
- 2.2
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- High
- EF EPI 564
- 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 Zermatt (46.02°, 7.7486°, elevation 0 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).