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

September weather forecast and climate
Fairfield, CA

The first month of the autumn, September, is still a hot month in Fairfield, California, with average temperature fluctuating between 86.5°F (30.3°C) and 54.5°F (12.5°C).


In September, the average high-temperature is essentially the same as in August - a still tropical 86.5°F (30.3°C). In September, in Fairfield, California, the average low-temperature is 54.5°F (12.5°C).


In Fairfield, during September, the rain falls for 1 days and regularly aggregates up to 0.2" (6.1mm) of precipitation. Throughout the year, in Fairfield, there are 61 rainfall days, and 22.7" (576.1mm) of precipitation is accumulated.


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

What is the temperature in September in Fairfield?

The average high-temperature, in September, in Fairfield, is 86.5°F (30.3°C), while the average low-temperature is 54.5°F (12.5°C).

How much does it rain in Fairfield in September?

In Fairfield, California, in September, it is raining for 1 days, with typically 0.2" (6.1mm) of accumulated precipitation.

How many hours of daylight does Fairfield have in September?

In September, the average length of the day is 12.4h.
Average temperature in September - Fairfield, CA
  • Average high temperature in September: 86.6°F

The warmest month (with the highest average high temperature) is July (89°F).
The month with the lowest average high temperature is January (55.4°F).

  • Average low temperature in September: 54.5°F

Months with the highest average low temperature are July and August (56°F).
The coldest month (with the lowest average low temperature) is January (37.6°F).

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

The wettest month (with the highest rainfall) is January (4.8").
The driest month (with the lowest rainfall) is July (0").

Average rainfall days in September - Fairfield, CA
  • Average rainfall days in September: 1 days

The month with the highest number of rainy days is January (11 days).
Months with the lowest number of rainy days are July and August (0 days).

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

The month with the longest days is June (Average daylight: 14.8h).
The month with shortest days is December (Average daylight: 9.5h).