National Weather Service Forecast for: Altadena CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Updated: 4:31 pm PST Feb 1, 2026
 
Overnight

Overnight: Mostly clear, with a low around 58. Northeast wind around 5 mph becoming calm.
Mostly Clear
 Monday

Monday: Sunny, with a high near 75. Calm wind becoming southwest around 5 mph in the afternoon.
Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 57. Calm wind.
Mostly Clear
 Tuesday

Tuesday: Sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon.
Sunny
 Tuesday
Night
Tuesday Night: Clear, with a low around 59. Northeast wind 5 to 10 mph.
Clear
 Wednesday

Wednesday: Sunny, with a high near 85.
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 60.
Mostly Clear
 Thursday

Thursday: Mostly sunny, with a high near 83.
Mostly Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 57.
Partly Cloudy
Lo 58 °F Hi 75 °F Lo 57 °F Hi 82 °F Lo 59 °F Hi 85 °F Lo 60 °F Hi 83 °F Lo 57 °F

Air Quality Alert
 

Overnight
 
 Mostly clear, with a low around 58. Northeast wind around 5 mph becoming calm.
Monday
 
 Sunny, with a high near 75. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
 
 Mostly clear, with a low around 57. Calm wind.
Tuesday
 
 Sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon.
Tuesday Night
 
 Clear, with a low around 59. Northeast wind 5 to 10 mph.
Wednesday
 
 Sunny, with a high near 85.
Wednesday Night
 
 Mostly clear, with a low around 60.
Thursday
 
 Mostly sunny, with a high near 83.
Thursday Night
 
 Partly cloudy, with a low around 57.
Friday
 
 Partly sunny, with a high near 74.
Friday Night
 
 Mostly clear, with a low around 55.
Saturday
 
 Mostly sunny, with a high near 73.
Saturday Night
 
 Mostly clear, with a low around 55.
Sunday
 
 Sunny, with a high near 78.

 

Forecast from NOAA-NWS for Altadena CA.