Average data for 10 years
1 September
Monday
+26°
+15°
2 September
Tuesday
+26°
+15°
3 September
Wednesday
+27°
+16°
4 September
Thursday
+26°
+16°
5 September
Friday
+26°
+16°
6 September
Saturday
+26°
+15°
7 September
Sunday
+26°
+15°
8 September
Monday
+26°
+15°
9 September
Tuesday
+26°
+15°
10 September
Wednesday
+26°
+15°
11 September
Thursday
+26°
+15°
12 September
Friday
+25°
+15°
13 September
Saturday
+25°
+14°
14 September
Sunday
+24°
+14°
15 September
Monday
+24°
+14°
16 September
Tuesday
+24°
+14°
17 September
Wednesday
+24°
+14°
18 September
Thursday
+23°
+14°
19 September
Friday
+23°
+14°
20 September
Saturday
+23°
+13°
21 September
Sunday
+23°
+13°
22 September
Monday
+23°
+13°
23 September
Tuesday
+23°
+12°
24 September
Wednesday
+22°
+12°
25 September
Thursday
+22°
+13°
26 September
Friday
+22°
+12°
27 September
Saturday
+22°
+12°
28 September
Sunday
+22°
+12°
29 September
Monday
+22°
+11°
30 September
Tuesday
+22°
+12°
Cities with similar weather in September
Suhum
Bulgaria
Burgas
Montenegro
Tivat
Bulgaria
The Sunny Beach
Serbia
Belgrade
In September, the weather in Siena is typically warm. Average daily high temperature in September is about 24 degrees above zero. On average, Siena has 15 sunny, 10 rainy, and 5 partly cloudy days in September. The rains are usually heavy.