Mountain View
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Mountain View, CA

A sunset view of a street in Mountain View Town, California, with neon-lit buildings, trees, parked cars, and distant colorful sunset skies
A sunset view of a street in Mountain View Town, California, with neon-lit buildings, trees, parked cars, and distant colorful sunset skies
The first month of the autumn, September, is still a warm month in Mountain View, California, with average temperature ranging between min 57.7°F (14.3°C) and max 77.5°F (25.3°C).

Temperature

The warmest month is September, with an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 57.7°F (14.3°C).

Rainfall

January through June, September through December are months with rainfall in Mountain View. September is the first month it rains in Mountain View. Throughout September, in the average 1.5 rainfall days, it receives 0.2" (5.1mm) of precipitation. Throughout the year, there are 64 rainfall days, and 14.8" (375.7mm) of precipitation is accumulated.

Daylight

In Mountain View, the average length of the day in September is 12.4h.

What is the warmest month in Mountain View?

September is the warmest month in Mountain View, California, with an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 57.7°F (14.3°C).

What is the temperature in September in Mountain View?

The average high-temperature, in September, in Mountain View, California, is 77.5°F (25.3°C), while the average low-temperature is 57.7°F (14.3°C).

When does it start raining in Mountain View?

September is the first month it rains in Mountain View. Throughout September, in the average 1.5 rainfall days, it receives 0.2" (5.1mm) of precipitation.

How many hours of daylight does Mountain View have in September?

In Mountain View, the average length of the day in September is 12.4h.
Average temperature in September - Mountain View, CA
  • Average high temperature in September: 77.5°F

The warmest month (with the highest average high temperature) is September (77.5°F).
The month with the lowest average high temperature is January (58.6°F).

  • Average low temperature in September: 57.7°F

Months with the highest average low temperature are July and August (59.2°F).
Coldest months (with the lowest average low temperature) are January and December (43°F).

Average rainfall in September - Mountain View, CA
  • Average rainfall in September: 0.2"

The wettest month (with the highest rainfall) is February (3.1").
Driest months (with the lowest rainfall) are July and August (0").

Average rainfall days in September - Mountain View, CA
  • Average rainfall days in September: 1.5 days

The month with the highest number of rainy days is December (11.1 days).
Months with the lowest number of rainy days are July and August (0.2 days).

Average daylight in September - Mountain View, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).