Cupertino weather in September (California, United States of America)

Can you expect sunny skies in Cupertino in September? Want to know if this month is ideal for visiting? Our guide provides detailed weather information.

Temperatures

Expect perfect weather in Cupertino during September, which means high temperatures and almost no rainfall. The summer season takes place during September. During the daylight hours, temperatures often reach 28°C. After dark they usually decrease to around 13°C.

Precipitation

Cupertino in September usually receives almost no rainfall, averaging around 2.7 mm for the month. Historically, the month has about a single day of rain.

Average sunshine

There are approximately 270 hours of sunshine this month, meaning plenty of sunny days and a vibrant atmosphere.

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 a single day  

Humidity 73% *  

Sunshine 270 hours *  

Percentage Sunshine 73% *  

Data from: San Francisco, the United States of America (45 KM, 28 Miles).

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

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.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Interested in more climate information?

This site 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 travel conditions. Find out where to go with our weather planner.