Temperature for September
In Long Beach, CA during September the average high temperature is 82.1°F. The hottest day on record was September 28, 2010 when the temperature hit 111.0°F.
Precipitation for September
In September the average monthly rainfall in Long Beach, CA is 0.11 inches with rain usually falling on between 2 and 3 days. 1944 was the driest September with only 0.00 inches of rain falling, and 1976 was the wettest September with 1.57 inches of rain. The wettest single day in September was 11 September 1976 when 1.18 inches of rain fell.
In September there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in September.