Cupertino Weather in September

Cupertino in September averages 28°C (82°F) during the day and 13°C (55°F) at night. This is part of the summer season. Minimal rainfall is to be expected.

Rainfall in Cupertino in September

Historically, September sees about a single day of rain, with a monthly average of 2.7 mm (0.1 in). Any rain that does arrive is likely to be light drizzle rather than a proper shower.

Temperature in Cupertino in September

The perfect temperature in Cupertino in September makes it a solid month to visit, with 28°C (82°F) during the day and 13°C (55°F) at night. During September, you'll experience the summer season. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 13°C (55°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Cupertino in September

Expect a lot of sunshine this month, with about 270 hours of sun. These sunny conditions add to the overall experience.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Cupertino.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Cupertino's climate page.

Cupertino Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 28°C (82°F)  

Chance of Rain 3%  

Precipitation 2.7 mm (0.1 in)  

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).

What to Wear in Cupertino in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Almost no rain is expected, so no need to bring rain gear. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Cupertino in September

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

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Cupertino's climate page.

More climate data for Cupertino

Temperature Rainfall Sunshine Humidity

See the full Cupertino climate overview or explore weather in the United States of America.