The temperatures in Siena in October are usually low and can range between 10°C and 20°C.
You can expect about 3 to 8 days of rain in Siena during the month of October. 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 Siena in October 2025.
If you’re planning to visit Siena in the near future, we highly recommend that you review the 14 day weather forecast for Siena before you arrive.
Temperatures
20° / 10°
Rainy Days
4
Snowy Days
0
Dry Days
27
Rainfall
79
mm
Sun Hours
10.6
Hrs
