Altadena, CA has a mild Mediterranean climate, characterized by dry summers and mild winters. The temperatures in the summer stay relatively warm, with an average high of 88°F (31°C). In the winter, temperatures cool to an average low of 39°F (4°C). While the area experiences some rainfall throughout the year, most of it falls from November to March. This makes summer the ideal time for outdoor activities as it is generally sunny and warm.
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.
Weather Highlights
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