Sion sits deep in the Rhone valley surrounded by some of the highest peaks in the Alps, and that sheltered inner-valley position makes it one of the driest towns in Switzerland, in stark contrast to the heavy rainfall on the surrounding mountain ridges. MeteoSwiss’s national radar network covers this inner Alpine valley district.
Learn more: How Does Rain Radar Work? · Open the full Rain Map
Frequently Asked Questions
Is it raining in Sion right now?
The live radar map above shows precipitation over Sion, Valais in real time. Blue shades indicate light rain, while yellow, orange, and red mark heavier downpours. If no colored echoes appear over Sion, no significant rain is currently being detected.
How often does the Sion rain radar update?
The radar refreshes continuously, typically every few minutes, so the map reflects current conditions rather than an hours-old forecast. Press play to animate the most recent frames.
Can I see if a storm is heading toward Sion?
Yes. Press play on the radar to animate the last few hours of rainfall and watch which way rain cells over Valais are moving – the clearest way to judge whether a shower will reach Sion or pass by.
Is this Sion rain radar free to use?
Yes, completely free – no account, app download, or sign-up required. It works in any browser on desktop and mobile.