Live Weather & Forecast
Weather in Sion
Valais, Switzerland · Real-time conditions & 3-day outlook
7°C
Feels like 6°C
45°F / Feels 43°F
Light rain
Sion, Valais
🌞 Daytime
Updated: 2026-04-12 13:45
Humidity
87%
Wind
6.1 km/h NNW
Wind Gust
8.5 km/h
Pressure
1017 mb
Visibility
10 km
UV Index
0.5
(Low)
Precipitation
1.71 mm
Cloud Cover
75%
Dew Point
3.8°C
Wind Degree
334°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
142.7 μg/m³
NO₂
1.3 μg/m³
O₃
106 μg/m³
SO₂
0.8 μg/m³
PM 2.5
2.8 μg/m³
PM 10
6.2 μg/m³
Today's Hourly Forecast
24-hour breakdown for Sion, Valais
12 AM
7°
Light drizzle
1 AM
7°
Light drizzle
2 AM
6°
Light rain
3 AM
6°
Light drizzle
4 AM
6°
Light drizzle
5 AM
6°
Patchy rain nearby
6 AM
6°
Light drizzle
7 AM
6°
Light drizzle
8 AM
5°
Light rain
9 AM
5°
Light rain
10 AM
4°
Light rain
11 AM
4°
Light rain
12 PM
5°
Light rain
1 PM
7°
Light rain
2 PM
5°
Light rain
3 PM
6°
Light rain
4 PM
6°
Light rain
5 PM
6°
Light rain
6 PM
6°
Light rain
7 PM
6°
Light rain
8 PM
5°
Light rain
9 PM
5°
Light drizzle
10 PM
5°
Light drizzle
11 PM
5°
Light drizzle
3-Day Forecast
Daily overview for Sion, Valais
Today
Heavy rain
6°
/
4°
🌧️ 98% chance of rain
💧 Avg. humidity: 93%
💨 Max wind: 13.7 km/h
🌧️ Total precip: 23.16 mm
☀️ UV Index: 0.2
🌅 Sunrise: 07:21 AM
🌇 Sunset: 08:38 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Patchy rain nearby
14°
/
4°
🌧️ 88% chance of rain
💧 Avg. humidity: 81%
💨 Max wind: 14.8 km/h
🌧️ Total precip: 3.54 mm
☀️ UV Index: 1
🌅 Sunrise: 07:19 AM
🌇 Sunset: 08:39 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Sunny
16°
/
5°
🌧️ 0% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 9.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.4
🌅 Sunrise: 07:17 AM
🌇 Sunset: 08:40 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit Sion
Plan your trip to Sion, Switzerland around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Sion?
Current conditions in Sion: Light rain, temperature 7°C, humidity 87%.
What is the best time to visit Sion?
The best time to visit Sion is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Sion?
Sion is located at approximately 43.7° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Sion?
The wettest period in Sion is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Sion?
For visits to Sion during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Sion in?
Sion is located in Switzerland, in the state of Valais.
What are the public holidays in Sion in 2026?
View the 2026 public holidays for Sion on our Holidays page.
What are the GPS coordinates used for the weather forecast in Sion?
The weather forecast for Sion uses coordinates 43.739, 0.0082.