Climate of Sion, Valais, Switzerland
Point-value climate at Sion (Valais, Switzerland). Population approximately 28,045.
Located in Valais, Switzerland, Sion has a seasonal climate. Population approximately 28,045. Monthly average temperatures range from 0.1°C / 32.2°F in January to 19°C / 66.2°F in July, with rainfall varying from 46 mm / 1.8 in (April) to 71 mm / 2.8 in (June) — about 740 mm / 29.1 in across the year. Sion is the capital of Valais. These are point-value climate normals sampled at Sion's coordinates — often quite different from the surrounding region's area-weighted average.
| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | 0.1°C32.2°F | 59 mm2.3″ | Snowy |
| February | 1.8°C35.2°F | 67 mm2.6″ | Snowy |
| March | 5.8°C42.4°F | 49 mm1.9″ | — |
| April | 9°C48.2°F | 46 mm1.8″ | — |
| May | 13.7°C56.7°F | 58 mm2.3″ | — |
| June | 16.6°C61.9°F | 71 mm2.8″ | — |
| July | 19°C66.2°F | 64 mm2.5″ | — |
| August | 18.4°C65.1°F | 64 mm2.5″ | — |
| September | 14.7°C58.5°F | 54 mm2.1″ | — |
| October | 9.7°C49.5°F | 67 mm2.6″ | — |
| November | 3.9°C39°F | 70 mm2.8″ | — |
| December | 0.8°C33.4°F | 71 mm2.8″ | Snowy |
Frequently asked questions
What is the best time to visit Sion?
Sion does not have a clearly "sunny" season by our profile cutoffs — see the "warmest and driest months" fallback for the closest picks. Sion's warmest month is July at an average of 19°C / 66.2°F, and its driest month is April with about 46 mm / 1.8 in of rain.
What is the climate of Sion?
Sion, in Valais, Switzerland, has monthly average temperatures ranging from 0.1°C / 32.2°F in January to 19°C / 66.2°F in July. Annual rainfall is approximately 740 mm / 29.1 in, with the wettest month being June (71 mm / 2.8 in) and the driest April (46 mm / 1.8 in).
What is the average temperature in Sion in July?
The average temperature in Sion in July is 19°C / 66.2°F, with rainfall of about 64 mm / 2.5 in — the warmest month of the year.
When is the driest month in Sion?
The driest month in Sion is April, with about 46 mm / 1.8 in of average monthly rainfall. Average temperature that month is 9°C / 48.2°F.
When is the wettest month in Sion?
The wettest month in Sion is June, with approximately 71 mm / 2.8 in of average monthly rainfall.