The long-range forecast for Siena predicts a heatwave, with temperatures reaching up to 40°, significantly higher than typical for Siena for this time of the year and 4.8 °F above 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
40° / 19°
Friday
Aug 7
40° / 20°
Saturday
Aug 8
39° / 20°
Sunday
Aug 9
39° / 20°
Monday
Aug 10
40° / 20°
Tuesday
Aug 11
38° / 20°
Wednesday
Aug 12
38° / 19°
Thursday
Aug 13
40° / 21°
Friday
Aug 14
39° / 21°
Saturday
Aug 15
39° / 21°
Sunday
Aug 16
38° / 20°
Monday
Aug 17
36° / 19°
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.
Weather in Siena for the next 30 days
August
Click on a day for an hourly weather forecast
Recommended Hotels in Siena
Siena long range weather forecast - FAQ
Do you provide 30 days weather forecast for Siena?
You can see the next 30 weather forecast for Siena at the top of the page, the next 14 days (from today) are more accurate, while the other is based on average of previous years.
Can I see the weather forecast for a particular date in Siena?
Sure, you can select the date from the calendar above to view the forecast in Siena on that date.
How accurate is the long-range weather forecast for Siena?
Our long-range weather forecast for Siena is provided by using statistics from previous years. Although we cannot predict the weather months in advance, we can see an average.
Can I see a long-range weather forecast for different countries?
Yes, we provide a 14 day weather forecast and a long-range weather forecast for different countries and cities. You can search for a location in the search box at the top of the page.
More about the weather in Siena