National Weather Service Forecast for: Montclair CA
Issued by: National Weather Service San Diego, CA
Updated: 12:56 pm PST Dec 17, 2025
 
Tonight

Tonight: Mostly clear, with a low around 53. East wind around 5 mph becoming west after midnight.
Mostly Clear

Thursday

Thursday: Sunny, with a high near 82. Northeast wind around 5 mph becoming calm  in the morning.
Sunny

Thursday
Night
Thursday Night: Mostly clear, with a low around 56. Northeast wind around 5 mph.
Mostly Clear

Friday

Friday: Sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.
Sunny

Friday
Night
Friday Night: Mostly clear, with a low around 53. Calm wind becoming northeast around 5 mph.
Mostly Clear

Saturday

Saturday: Mostly sunny, with a high near 74.
Mostly Sunny

Saturday
Night
Saturday Night: Partly cloudy, with a low around 53.
Partly Cloudy

Sunday

Sunday: Partly sunny, with a high near 74.
Partly Sunny

Sunday
Night
Sunday Night: Patchy fog after 4am.  Otherwise, partly cloudy, with a low around 52.
Partly Cloudy
then Patchy
Fog
Lo 53 °F Hi 82 °F Lo 56 °F Hi 78 °F Lo 53 °F Hi 74 °F Lo 53 °F Hi 74 °F Lo 52 °F

Air Quality Alert
 

Tonight
 
Mostly clear, with a low around 53. East wind around 5 mph becoming west after midnight.
Thursday
 
Sunny, with a high near 82. Northeast wind around 5 mph becoming calm in the morning.
Thursday Night
 
Mostly clear, with a low around 56. Northeast wind around 5 mph.
Friday
 
Sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
 
Mostly clear, with a low around 53. Calm wind becoming northeast around 5 mph.
Saturday
 
Mostly sunny, with a high near 74.
Saturday Night
 
Partly cloudy, with a low around 53.
Sunday
 
Partly sunny, with a high near 74.
Sunday Night
 
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 52.
Monday
 
Patchy fog before 10am. Otherwise, partly sunny, with a high near 73.
Monday Night
 
Mostly cloudy, with a low around 52.
Tuesday
 
A slight chance of showers. Partly sunny, with a high near 69.
Tuesday Night
 
A chance of showers. Mostly cloudy, with a low around 53.
Wednesday
 
Showers likely. Mostly cloudy, with a high near 64.

 

Forecast from NOAA-NWS for Montclair CA.