The temperatures in Cortona in September are comfortable with low of 12°C and and high up to 24°C.
You can expect about 3 to 8 days of rain in Cortona during the month of September. 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 Cortona in September 2025.
If you’re planning to visit Cortona in the near future, we highly recommend that you review the 14 day weather forecast for Cortona before you arrive.
Temperatures
24° / 12°
Rainy Days
4
Snowy Days
0
Dry Days
26
Rainfall
83
mm
Sun Hours
11.5
Hrs
