Long Beach Custom Search   The amount of rainfall that falls at Long Beach is close to the national average. September is when you get the most rain here, and April is when it's the driest. During the summertime at Long Beach temperatures are frequently in the 50's while nighttime lows are ordinarily in the 40's. The wintertime brings highs down to the 30's; all through the dark hours in the wintertime at Long Beach temperatures drop to the 20's.            Map Detailed Map Weather Local weather forecast These outdoors activities are available near Long Beach.