Altadena, California gets 23 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Altadena averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 287 sunny days per year in Altadena. The US average is 205 sunny days.
Altadena gets some kind of precipitation, on average, 37 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.
Summer High: the July high is around 86 degrees
Winter Low: the January low is 47
Rain: averages 23 inches of rain a year
Snow: averages 0 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Altadena is 9.1 (10=best), which means it is one of the most pleasant places in California.
9.1 / 10
June, October and May are the most pleasant months in Altadena, while January and February are the least comfortable months.