Palo Alto Weather in September

Palo Alto in September averages 26°C (79°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 Palo Alto in September

The climate data from previous years indicates about a single day of rain, averaging 2.7 mm (0.1 in) for the month. On the rare occasion it rains this month, it usually amounts to very little.

Temperature in Palo Alto in September

September in Palo Alto is generally excellent, with days reaching 26°C (79°F) and nights settling around 13°C (55°F). September is a notable month of the summer season. Overall, the month follows a fairly predictable daily temperature pattern. With lows of 13°C (55°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest. On average, this month sees the highest temperatures of the year. Worth packing a few lighter outfits.

Sunshine in Palo Alto in September

Enjoy a sunny month with about 270 hours of sunshine, the clear skies make Palo Alto even more beautiful.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. April, May, June, July, August, September and October typically offer the best weather for Palo Alto.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• October
• November
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For a detailed overview over the year and the best time to visit the United States of America, check out our Palo Alto's climate page.

Palo Alto Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 26°C (79°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 (27 KM, 17 Miles).

What to Wear in Palo Alto in September

Warm but pleasant conditions in Palo Alto in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Dry conditions mean you won't need to worry about rain protection. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Palo Alto 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 Palo Alto's climate page.

More climate data for Palo Alto

Temperature Rainfall Sunshine Humidity

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