National Weather Service Forecast for: Montclair CA
Issued by: National Weather Service San Diego, CA
Updated: 12:29 am PDT Jun 22, 2026
 
Overnight

Overnight: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 59. West wind around 5 mph becoming calm.
Patchy Fog

 Monday

Monday: Patchy fog before 8am. Otherwise, sunny, with a high near 85. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 62. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Mostly Clear
then Patchy
Fog
 Tuesday

Tuesday: Patchy fog before 8am. Otherwise, sunny, with a high near 91. Light west wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Patchy Fog
then Sunny
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 66. West wind 5 to 10 mph becoming light southwest in the evening. Winds could gust as high as 20 mph.
Mostly Clear

 Wednesday

Wednesday: Mostly sunny, with a high near 92.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 62.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 90.
Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 60.
Mostly Clear
Lo 59 °F Hi 85 °F Lo 62 °F Hi 91 °F Lo 66 °F Hi 92 °F Lo 62 °F Hi 90 °F Lo 60 °F

Air Quality Alert
 

Overnight
 
 Patchy fog after 5am. Otherwise, partly cloudy, with a low around 59. West wind around 5 mph becoming calm.
Monday
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 85. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
 
 Patchy fog after 5am. Otherwise, mostly clear, with a low around 62. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Tuesday
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 91. Light west wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
 
 Mostly clear, with a low around 66. West wind 5 to 10 mph becoming light southwest in the evening. Winds could gust as high as 20 mph.
Wednesday
 
 Mostly sunny, with a high near 92.
Wednesday Night
 
 Mostly clear, with a low around 62.
Thursday
 
 Sunny, with a high near 90.
Thursday Night
 
 Mostly clear, with a low around 60.
Friday
 
 Sunny, with a high near 86.
Friday Night
 
 Mostly clear, with a low around 59.
Saturday
 
 Sunny, with a high near 84.
Saturday Night
 
 Increasing clouds, with a low around 58.
Sunday
 
 Partly sunny, then gradually becoming sunny, with a high near 78.

 

Forecast from NOAA-NWS for Montclair CA.