Valais weather in December
December is one of the least pleasant months in Valais: highs of -5°C (24°F) and about 68 mm (2.7 in) of rain on average. Nights average -13°C (9°F) and cloud cover 76% (NASA POWER, 2001–2025 averages). It is the 4th driest month of the year and the 3rd coolest. Compared with November, it is cooler and drier; January brings highs of -6°C (22°F) and 63 mm (2.5 in) of rain.
Figures are long-term averages for Sitten, the largest city in Valais. See below for other places.
Is December a good time to visit Valais?
least pleasant month Weather score 33/100.
December is one of the least pleasant months for weather in Valais. For better conditions, consider Jun–Aug.
Does it rain a lot in Valais in December?
Some rain is normal: about 68 mm (2.7 in) falls in an average December. It is the 4th driest month of the year.
How warm is Valais in December?
Days average -5°C (24°F) and nights -13°C (9°F).
Valais weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | -6°C (22°F) | -14°C (6°F) | 63 mm | 76% | least pleasant |
| February | -5°C (23°F) | -14°C (6°F) | 50 mm | 74% | least pleasant |
| March | -2°C (28°F) | -10°C (13°F) | 63 mm | 70% | least pleasant |
| April | 3°C (37°F) | -5°C (23°F) | 70 mm | 69% | least pleasant |
| May | 8°C (47°F) | -1°C (31°F) | 109 mm | 73% | least pleasant |
| June | 13°C (55°F) | 4°C (38°F) | 97 mm | 66% | best |
| July | 15°C (58°F) | 5°C (41°F) | 96 mm | 59% | best |
| August | 14°C (58°F) | 5°C (41°F) | 99 mm | 60% | best |
| September | 11°C (51°F) | 1°C (34°F) | 68 mm | 60% | fair |
| October | 6°C (43°F) | -2°C (28°F) | 72 mm | 68% | least pleasant |
| November | 0°C (31°F) | -8°C (18°F) | 91 mm | 75% | least pleasant |
| December | -5°C (24°F) | -13°C (9°F) | 68 mm | 76% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Valais in December
Weather can differ a lot within Valais: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Sitten | -5°C (24°F) | -13°C (9°F) | 68 mm | least pleasant |
| Zermatt | -5°C (24°F) | -13°C (9°F) | 68 mm | least pleasant |
| Martigny-Ville | -1°C (30°F) | -9°C (16°F) | 110 mm | least pleasant |
| Monthey | 2°C (36°F) | -4°C (24°F) | 101 mm | least pleasant |
| Sierre | -1°C (31°F) | -8°C (18°F) | 91 mm | least pleasant |