Average Number of Rainy Days per Year

Long Beach receives an average of about 40 days of rain per year. This is relatively low compared to other coastal cities in California. Rainfall is mainly concentrated in the winter and early spring, with very little rain during the summer. However, sudden heavy rains can occur during El Niño events or monsoon seasons.

Average Monthly Rainfall

The average monthly rainfall in Long Beach varies significantly depending on the season and monsoon effects. The average rainfall for each month is as follows:

Long Beach

• January: about 2.5 inches
• February: about 3.0 inches
• March: about 2.5 inches
• April: about 1.0 inch
• May: about 0.5 inches
• June: about 0.1 inches
• July: about 0.0 inches
• August: about 0.1 inches
• September: about 0.2 inches
• October: about 1.0 inch
• November: about 1.8 inches
• December: about 2.5 inches

Main Features:

• Winter (December to February): This is the period with the most rainfall, and frequent thunderstorms can occur in coastal areas.
• Spring (March to May): Rainfall gradually decreases in spring, leading to dry weather. However, strong thunderstorms can occur in March due to monsoon effects.
• Summer (June to August): Very dry, with short and intense rainfall occurring rarely during the monsoon season.
• Autumn (September to November): Rainfall increases again in autumn, particularly in October and November, when monsoon effects can lead to higher precipitation.

Record Rainfall

Record Rainfall: The highest recorded rainfall in Long Beach occurred during a storm in January 1995, with 5.6 inches (about 142mm) of rain. This amount of rainfall resulted in severe flooding and inundation in the area.