This year's long-range forecast for Siena reveals higher temperatures, peaking at 39°, indicative of a warming trend against the historical average.
Select a month and click on a day for more information:
Saturday
Aug 1
35° / 18°
Sunday
Aug 2
34° / 17°
Monday
Aug 3
33° / 17°
Tuesday
Aug 4
39° / 19°
Wednesday
Aug 5
39° / 19°
Thursday
Aug 6
39° / 19°
Friday
Aug 7
39° / 20°
Saturday
Aug 8
39° / 20°
Sunday
Aug 9
39° / 20°
Monday
Aug 10
39° / 21°
Tuesday
Aug 11
36° / 20°
Wednesday
Aug 12
35° / 19°
Thursday
Aug 13
35° / 18°
Friday
Aug 14
33° / 18°
Saturday
Aug 15
35° / 17°
Sunday
Aug 16
35° / 17°
Monday
Aug 17
34° / 17°
Tuesday
Aug 18
31° / 18°
Wednesday
Aug 19
32° / 17°
Thursday
Aug 20
33° / 17°
Friday
Aug 21
34° / 18°
Saturday
Aug 22
33° / 18°
Sunday
Aug 23
33° / 18°
Monday
Aug 24
32° / 17°
Tuesday
Aug 25
32° / 17°
Wednesday
Aug 26
32° / 17°
Thursday
Aug 27
32° / 18°
Friday
Aug 28
28° / 17°
Saturday
Aug 29
29° / 16°
Sunday
Aug 30
28° / 16°
Monday
Aug 31
27° / 16°
Siena 30 days weather forecast
Check out our estimated 30 days weather forecast for Siena, this data is based on the average weather in Siena in the last few years.
For a more accurate and detailed forecast, check out the 14 day weather for Siena next to the desired date.