Average data for 10 years
1 September
Sunday
+27°
+19°
2 September
Monday
+27°
+17°
3 September
Tuesday
+25°
+17°
4 September
Wednesday
+26°
+18°
5 September
Thursday
+28°
+19°
6 September
Friday
+27°
+18°
7 September
Saturday
+26°
+18°
8 September
Sunday
+27°
+18°
9 September
Monday
+27°
+18°
10 September
Tuesday
+26°
+17°
11 September
today
+24°
+16°
12 September
tomorrow
+23°
+15°
13 September
Friday
+23°
+15°
14 September
Saturday
+23°
+15°
15 September
Sunday
+23°
+15°
16 September
Monday
+24°
+17°
17 September
Tuesday
+25°
+17°
18 September
Wednesday
+26°
+18°
19 September
Thursday
+25°
+18°
20 September
Friday
+24°
+16°
21 September
Saturday
+24°
+16°
22 September
Sunday
+26°
+18°
23 September
Monday
+26°
+18°
24 September
Tuesday
+26°
+19°
25 September
Wednesday
+27°
+20°
26 September
Thursday
+28°
+21°
27 September
Friday
+27°
+19°
28 September
Saturday
+23°
+15°
29 September
Sunday
+22°
+16°
30 September
Monday
+24°
+17°
Cities with similar weather in September
Portugal
Lisbon
Portugal
Porto
Italy
Genoa
France
Marseilles
Croatia
Dubrovnik
September in Napa is the warmest month of the year. In September, the weather in Napa is typically warm. Average daily high temperature in September is about 25 degrees above zero. On average, Napa has 30 sunny days in September. September as well as May, June, July, and August is considered the most comfortable time to visit Napa.