The weather in Martigny in September is very cold with temperatures between 3°C and 15°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Martigny. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Martigny in September 2026.
If you’re planning to visit Martigny in the near future, we highly recommend that you review the 14 day weather forecast for Martigny before you arrive.
Temperatures
15° / 3°
Rainy Days
14
Snowy Days
0
Dry Days
16
Rainfall
193
mm
Sun Hours
10.5
Hrs
