The temperatures in Oyonnax in August are comfortable with low of 13°C and and high up to 26°C.
You can expect about 3 to 8 days of rain in Oyonnax during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Oyonnax in August 2026.
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
26° / 13°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
157
mm
Sun Hours
11.1
Hrs
