The weather in Oyonnax in December is very cold with temperatures between 1°C and 7°C, warm clothes are a must.
You can expect rain for roughly half of the month of December in Oyonnax. 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.
You can expect a few days of snow in Oyonnax during December. It’s important to get out your snow boots and warm mittens to stay warm while you explore Oyonnax.
Our weather forecast can give you a great sense of what weather to expect in Oyonnax in December 2025.
If you’re planning to visit Oyonnax in the near future, we highly recommend that you review the 14 day weather forecast for Oyonnax before you arrive.
Temperatures
7° / 1°
Rainy Days
11
Snowy Days
5
Dry Days
15
Rainfall
188
mm
Sun Hours
7.9
Hrs
