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