Average data for 10 years
1 August
Thursday
+30°
+22°
2 August
Friday
+29°
+23°
3 August
Saturday
+30°
+22°
4 August
Sunday
+30°
+22°
5 August
Monday
+30°
+22°
6 August
Tuesday
+30°
+22°
7 August
Wednesday
+31°
+22°
8 August
Thursday
+30°
+22°
9 August
Friday
+29°
+21°
10 August
Saturday
+28°
+19°
11 August
Sunday
+28°
+20°
12 August
Monday
+28°
+20°
13 August
Tuesday
+29°
+21°
14 August
Wednesday
+28°
+20°
15 August
Thursday
+28°
+21°
16 August
Friday
+28°
+20°
17 August
Saturday
+29°
+20°
18 August
Sunday
+29°
+21°
19 August
Monday
+29°
+21°
20 August
Tuesday
+30°
+22°
21 August
Wednesday
+30°
+21°
22 August
Thursday
+29°
+22°
23 August
Friday
+28°
+20°
24 August
Saturday
+28°
+20°
25 August
Sunday
+29°
+20°
26 August
Monday
+29°
+21°
27 August
Tuesday
+29°
+20°
28 August
Wednesday
+28°
+20°
29 August
Thursday
+28°
+20°
30 August
Friday
+28°
+20°
31 August
Saturday
+26°
+20°
August in Siena is the sunniest and the hottest month of the year. In August, the weather in Siena is typically hot. Average daily high temperature in August is about 29 degrees above zero. On average, Siena has 30 sunny and 1 rainy day in August. The rains are usually light. August as well as July and September is considered the most comfortable time to visit Siena.