Click on a day for an hourly weather forecast
The weather in Sion in January is very cold with temperatures between -14°C and -1°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Sion during the month of January. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Let it snow! You can expect Sion to be covered in white during the month of January. Be sure to bundle up when you venture outside, or take the opportunity to enjoy hot cocoa by the fire for warmth this month.
Our weather forecast can give you a great sense of what weather to expect in Sion in January 2025.
If you’re planning to visit Sion in the near future, we highly recommend that you review the 14 day weather forecast for Sion before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -1° / -14° | 5 | 6 | 21 | 206 mm | Awful | Sion in January |
| February | 0° / -13° | 5 | 5 | 20 | 149 mm | Awful | Sion in February |
| March | 2° / -10° | 8 | 5 | 20 | 166 mm | Awful | Sion in March |
| April | 6° / -5° | 12 | 7 | 12 | 158 mm | Awful | Sion in April |
| May | 10° / -1° | 20 | 5 | 7 | 298 mm | Awful | Sion in May |
| June | 16° / 2° | 18 | 11 | 1 | 241 mm | Ok | Sion in June |
| July | 18° / 4° | 16 | 15 | 0 | 230 mm | Ok | Sion in July |
| August | 18° / 4° | 14 | 17 | 0 | 207 mm | Ok | Sion in August |
| September | 15° / 2° | 11 | 17 | 2 | 132 mm | Bad | Sion in September |
| October | 10° / -2° | 8 | 18 | 6 | 115 mm | Awful | Sion in October |
| November | 4° / -7° | 7 | 10 | 13 | 157 mm | Awful | Sion in November |
| December | -1° / -12° | 7 | 7 | 18 | 190 mm | Awful | Sion in December |