Mountain View Weather in September

In Mountain View, September brings high daytime temperatures around 26°C (79°F), with nights cooling to 19°C (66°F). Expect quite a bit of rainfall this month.

Rainfall in Mountain View in September

Analyzing past climate data, one can expect approximately 18 days of rain, averaging 134 mm (5.3 in). Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Mountain View in September

In September, Mountain View gets high temperatures, with highs of 26°C (79°F). Nights cool to around 19°C (66°F). Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 19°C (66°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Mountain View in September

The area experiences a moderate amount of sunshine, with approximately 160 hours of sunlight expected. This means a decent mix of sun and overcast.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Mountain View.

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.

Mountain View Temperature in September

Min Temperature 19°C (66°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 58%  

Precipitation 134 mm (5.3 in)  

Rainy days 18 days  

Humidity 78% *  

Sunshine 160 hours *  

Percentage Sunshine 45% *  

* Data from: Hilo, the United States of America (16 KM, 10 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. Expect heavy rainfall, so bring good rain protection and waterproof bags. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Mountain View in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

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.