Bethel Island, CA enjoys a mild climate year-round. During the summer months, temperatures typically reach around 80 degrees Fahrenheit during the day and dip to the mid-50s at night. The winter months see temperatures in the low 60s during the day and 40s at night. Rainfall is plentiful throughout most of the year, averaging over 30 inches annually, with snowfall occurring occasionally in December and January. Winters are usually mild with no extreme cold spells or heavy snowfall. Summers can be hot with occasional days reaching up to 100 degrees Fahrenheit.
Bethel Island, California gets 15 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Bethel Island averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 260 sunny days per year in Bethel Island. The US average is 205 sunny days.
Bethel Island gets some kind of precipitation, on average, 56 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 93 degrees
Winter Low: the January low is 39
Rain: averages 15 inches of rain a year
Snow: averages 0 inches of snow a year