Monthly weather forecast and climate
Long Beach, CA US

The warmest month (with the highest average high temperature) is August (83.8°F).
The month with the lowest average high temperature is December (66.8°F).

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is December (45.8°F).

The month with the highest relative humidity is June (69.6%).
The month with the lowest relative humidity is January (64.7%).

The wettest month (with the highest rainfall) is January (2.3").
Driest months (with the lowest rainfall) are June, July and August (0").

The month with the highest number of rainy days is February (6.5 days).
The month with the lowest number of rainy days is August (0.3 days).

Best months for swimming (with the highest average sea temperature) are July and August (67.9°F).
The coldest month (with the lowest average sea temperature) is January (58.3°F).

Months with the longest days are May, June and July (Average daylight: 14h).
Months with shortest days are January, November and December (Average daylight: 10h).

Months with most sunshine are July and August (Average sunshine: 11h).
Months with least sunshine are January, November and December (Average sunshine: 7).

Months with the highest UV index are June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 3).