Fullerton
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Fullerton, CA

A scenic view of the trees and neat lawns of the famous Muckenthaler Community Center in Fullerton, California
A scenic view of the trees and neat lawns of the famous Muckenthaler Community Center in Fullerton, California
September, the first month of the autumn, in Fullerton, is still a warm month, with average temperature ranging between max 83.8°F (28.8°C) and min 63.1°F (17.3°C).

Temperature

In Fullerton, the average high-temperature is relatively the same as in August - a still warm 83.8°F (28.8°C). In Fullerton, the average low-temperature is 63.1°F (17.3°C).

Rainfall

In Fullerton, in September, 0.2" (6.1mm) of precipitation is typically accumulated. Throughout the year, in Fullerton, 13.9" (352.8mm) of rain is accumulated.

Daylight

In September, the average length of the day in Fullerton, California, is 12.4h.

What is the temperature in September in Fullerton?

The average high-temperature, in September, in Fullerton, is 83.8°F (28.8°C), while the average low-temperature is 63.1°F (17.3°C).

How much does it rain in Fullerton in September?

In Fullerton, California, in September, 0.2" (6.1mm) of precipitation is typically accumulated.

How many hours of daylight does Fullerton have in September?

In Fullerton, California, the average length of the day in September is 12.4h.
Average temperature in September - Fullerton, CA
  • Average high temperature in September: 83.8°F

The warmest month (with the highest average high temperature) is August (85.4°F).
The month with the lowest average high temperature is December (67.4°F).

  • Average low temperature in September: 63.2°F

The month with the highest average low temperature is August (65.3°F).
The coldest month (with the lowest average low temperature) is January (44.6°F).

Average rainfall in September - Fullerton, CA
  • Average rainfall in September: 0.2"

The wettest month (with the highest rainfall) is February (3.3").
The driest month (with the lowest rainfall) is July (0").

Average daylight in September - Fullerton, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).