National Weather Service Forecast for: Altadena CA
Issued by: National Weather Service Los Angeles/Oxnard, CA
Updated: 8:27 pm PDT Jun 29, 2026
 
Tonight

Tonight: Patchy fog after 11pm. Otherwise, partly cloudy early, then becoming cloudy, with a low around 55. South southwest wind around 5 mph becoming calm in the evening.
Patchy Fog

 Tuesday

Tuesday: Patchy drizzle before 11am. Cloudy through mid morning, then gradual clearing, with a high near 69. Calm wind becoming south southwest around 5 mph in the afternoon.
Patchy
Drizzle then
Mostly Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 53. South southwest wind around 5 mph.
Patchy Fog

 Wednesday

Wednesday: Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 75. Calm wind becoming south southwest around 5 mph in the afternoon.
Patchy Fog
then Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 54. South southwest wind around 5 mph becoming calm in the evening.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 78.
Sunny

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 55.
Partly Cloudy

 Friday

Friday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 81.
Patchy Fog
then Sunny
 Friday
Night
Friday Night: Partly cloudy, with a low around 57.
Partly Cloudy
Lo 55 °F Hi 69 °F Lo 53 °F Hi 75 °F Lo 54 °F Hi 78 °F Lo 55 °F Hi 81 °F Lo 57 °F

 

Tonight
 
 Patchy fog after 11pm. Otherwise, partly cloudy early, then becoming cloudy, with a low around 55. South southwest wind around 5 mph becoming calm in the evening.
Tuesday
 
 Patchy drizzle before 11am. Cloudy through mid morning, then gradual clearing, with a high near 69. Calm wind becoming south southwest around 5 mph in the afternoon.
Tuesday Night
 
 Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 53. South southwest wind around 5 mph.
Wednesday
 
 Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 75. Calm wind becoming south southwest around 5 mph in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 54. South southwest wind around 5 mph becoming calm in the evening.
Thursday
 
 Sunny, with a high near 78.
Thursday Night
 
 Partly cloudy, with a low around 55.
Friday
 
 Patchy fog before 11am. Otherwise, mostly sunny, with a high near 81.
Friday Night
 
 Partly cloudy, with a low around 57.
Independence Day
 
 Mostly sunny, with a high near 84.
Saturday Night
 
 Partly cloudy, with a low around 58.
Sunday
 
 Sunny, with a high near 84.
Sunday Night
 
 Partly cloudy, with a low around 58.
Monday
 
 Sunny, with a high near 85.

 

Forecast from NOAA-NWS for Altadena CA.