Monmouth, CA has a Mediterranean climate with warm dry summers and cool wet winters. Average summer temperatures reach the mid-seventies during the day and night temperatures drop to the mid-fifties. Winters are mild with daytime highs in the low-fifties and night lows around forty degrees. Rainfall is common throughout most of the year, but it is heaviest during winter months, averaging around fifteen inches. Monmouth's proximity to the Pacific Ocean helps moderate temperatures, keeping them cool in the summer and relatively mild during winter months.
Monmouth, California gets 12 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Monmouth averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 267 sunny days per year in Monmouth. The US average is 205 sunny days.
Monmouth gets some kind of precipitation, on average, 44 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 97 degrees
Winter Low: the January low is 38
Rain: averages 12 inches of rain a year
Snow: averages 0 inches of snow a year