Palo Alto
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Palo Alto, CA

A beautiful view of palm trees and the iconic Hoover Tower within Stanford University in Palo Alto, California, a cool and sunny day with cloudy skies
A beautiful view of palm trees and the iconic Hoover Tower within Stanford University in Palo Alto, California, a cool and sunny day with cloudy skies
September, the first month of the autumn, in Palo Alto, is still a warm month, with temperature in the range of an average high of 79.5°F (26.4°C) and an average low of 52.5°F (11.4°C).

Temperature

July and September, with an average high-temperature of 79.5°F (26.4°C), are the warmest months.

Rainfall

In Palo Alto, in September, 0.1" (3.8mm) of precipitation is typically accumulated. During the entire year, Palo Alto aggregates up to 16.3" (413mm) of precipitation.

Daylight

The average length of the day in September is 12.4h.

What are the warmest months in Palo Alto?

Warmest months in Palo Alto are July and September, with an average high-temperature of 79.5°F (26.4°C).

What is the temperature in September in Palo Alto?

In September, in Palo Alto, the average high-temperature is 79.5°F (26.4°C), and the average low-temperature is 52.5°F (11.4°C).

How much does it rain in Palo Alto in September?

During September, Palo Alto regularly aggregates up to 0.1" (3.8mm) of precipitation.

What is the average length of the day in September in Palo Alto?

The average length of the day in September is 12.4h.
Average temperature in September - Palo Alto, CA
  • Average high temperature in September: 79.5°F

The warmest month (with the highest average high temperature) is July (79.6°F).
The month with the lowest average high temperature is December (58.3°F).

  • Average low temperature in September: 52.5°F

The month with the highest average low temperature is July (55.1°F).
The coldest month (with the lowest average low temperature) is December (38°F).

Average rainfall in September - Palo Alto, CA
  • Average rainfall in September: 0.2"

The wettest month (with the highest rainfall) is February (3.3").
Driest months (with the lowest rainfall) are July and August (0").

Average daylight in September - Palo Alto, 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).