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