Cupertino weather in September (California, United States of America)
What can you expect from the weather in Cupertino during September? Check out this comprehensive weather guide.
In Cupertino, September is characterized by high temperatures and almost no rainfall. September is a summer month. Anticipate daytime temperatures around 28°C, while night temperatures can drop to 13°C.
Cupertino in September usually receives almost no rainfall, averaging around 2.7 mm for the month. Based on our climate data of the past 30 years, about 1 day of rain are anticipated.
The city usually sees around 270 hours of sunlight, indicating many sunny days.
So this is a great month to visit if you prefer dry days with pleasant temperatures. April, May, June, July, August, September and October typically offer the most optimal weather. In contrast, January, February and December tend to have less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Cupertino climate page with graphs.
Cupertino, monthly averages in September
Min Temperature
13°C
Max Temperature
28°C
Chance of Rain
3%
Precipitation
2.7 mm
Rainy days
1 day
Humidity
73% *
Sunshine
270 hours *
Percentage Sunshine
73% *
Where to go in the United States of America in September
Find out more about the weather in the United States of America in September and which places have the best weather conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in Cupertino in September?
It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in September.
Interested in more climate information?
Weather and Climate provides you with all the information you need about the climate in Cupertino.
Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.
