National Weather Service Forecast for: Montclair CA
Issued by: National Weather Service San Diego, CA
Updated: 2:58 am PST Dec 22, 2025
 
Today

Today: Partly sunny, with a high near 72. Calm wind becoming west around 5 mph in the afternoon.
Partly Sunny

 Tonight

Tonight: Mostly cloudy, with a low around 52. West wind around 5 mph becoming calm.
Mostly Cloudy

 Tuesday

Tuesday: Rain likely, mainly after 4pm. Cloudy, with a high near 65. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
then Rain
Likely
 Tuesday
Night
Tuesday Night: Rain. The rain could be heavy at times. Low around 55. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.
Heavy Rain

 Wednesday

Wednesday: Rain, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 61. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Heavy Rain

 Wednesday
Night
Wednesday Night: Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 52. Chance of precipitation is 100%.
Heavy Rain

 Christmas
Day
Christmas Day: Rain. High near 61. Chance of precipitation is 90%.
Rain

 Thursday
Night
Thursday Night: Showers. Cloudy, with a low around 51.
Showers

 Friday

Friday: Showers. Cloudy, with a high near 59.
Showers
Hi 72 °F Lo 52 °F Hi 65 °F Lo 55 °F Hi 61 °F Lo 52 °F Hi 61 °F Lo 51 °F Hi 59 °F

Air Quality Alert
Flood Watch
Dense Fog Advisory
 

Today
 
 Partly sunny, with a high near 72. Calm wind becoming west around 5 mph in the afternoon.
Tonight
 
 Mostly cloudy, with a low around 52. West wind around 5 mph becoming calm.
Tuesday
 
 Rain likely, mainly after 4pm. Cloudy, with a high near 65. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 Rain. The rain could be heavy at times. Low around 55. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.
Wednesday
 
 Rain, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 61. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Wednesday Night
 
 Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 52. Chance of precipitation is 100%.
Christmas Day
 
 Rain. High near 61. Chance of precipitation is 90%.
Thursday Night
 
 Showers. Cloudy, with a low around 51.
Friday
 
 Showers. Cloudy, with a high near 59.
Friday Night
 
 A chance of showers. Mostly cloudy, with a low around 46.
Saturday
 
 A chance of showers. Mostly sunny, with a high near 61.
Saturday Night
 
 A slight chance of showers. Partly cloudy, with a low around 44.
Sunday
 
 A slight chance of showers. Mostly sunny, with a high near 63.

 

Forecast from NOAA-NWS for Montclair CA.