Mountain View Weather in September

September in Mountain View sees daytime temperatures around 26°C (79°F) and lows of 14°C (57°F) at night. The excellent weather makes it a good time to visit.

Rainfall in Mountain View in September

Looking at the last 30 years, the data shows about a single day with rain, averaging 2.9 mm (0.1 in) for the month. If rain does fall, it tends to be very light and barely worth getting out an umbrella for.

Temperature in Mountain View in September

September tends to be one of the excellent months in Mountain View, with 26°C (79°F) in the afternoon and 14°C (57°F) overnight. During September, the summer season is in full swing. This kind of day-to-night contrast is typical for this time of year. Nights drop to around 14°C (57°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable. It's the warmest month of the year on average, so summer clothing is the way to go.

Sunshine in Mountain View in September

The city usually sees around 270 hours of sunlight, indicating many sunny days , a great month for sightseeing.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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Check the conditions for any month of the year.

• January
• February
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• May
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• October
• November
• December

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

Mountain View Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 3%  

Precipitation 2.9 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 (36 KM, 22 Miles).

What to Wear in Mountain View in September

Warm but pleasant conditions in Mountain View 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. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Mountain View 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 Mountain View's climate page.

More climate data for Mountain View

Temperature Rainfall Sunshine Humidity

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