National Weather Service Forecast for: 3 Miles SW Fontana CA
Issued by: National Weather Service San Diego, CA
Updated: 12:35 pm PST Dec 22, 2025
 
Tonight

Tonight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 52. Southwest wind around 5 mph becoming calm.
Mostly Cloudy
then Patchy
Fog

 Tuesday

Tuesday: Showers likely, mainly after 4pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 67. East wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 60%.
Slight Chance
Showers and
Patchy Fog
then Showers
Likely
 Tuesday
Night
Tuesday Night: Showers. The rain could be heavy at times. Low around 56. Light east wind becoming southeast 10 to 15 mph after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Heavy Rain


 Wednesday

Wednesday: Showers, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 63. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Heavy Rain


 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 53. Southwest wind 10 to 15 mph becoming light and variable. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Heavy Rain


 Christmas
Day
Christmas Day: Showers. High near 63. Chance of precipitation is 80%.
Showers


 Thursday
Night
Thursday Night: Showers. Low around 51. Chance of precipitation is 90%.
Showers


 Friday

Friday: Showers. Mostly cloudy, with a high near 60.
Showers


 Friday
Night
Friday Night: Showers likely, mainly before 10pm. Mostly cloudy, with a low around 44.
Showers
Likely
Lo 52 °F Hi 67 °F Lo 56 °F Hi 63 °F Lo 53 °F Hi 63 °F Lo 51 °F Hi 60 °F Lo 44 °F

Flood Watch
Wind Advisory
 

Tonight
 
 Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 52. Southwest wind around 5 mph becoming calm.
Tuesday
 
 Showers likely, mainly after 4pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 67. East wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 60%.
Tuesday Night
 
 Showers. The rain could be heavy at times. Low around 56. Light east wind becoming southeast 10 to 15 mph after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Wednesday
 
 Showers, with thunderstorms also possible after 10am. Some of the storms could produce heavy rainfall. High near 63. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Wednesday Night
 
 Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 53. Southwest wind 10 to 15 mph becoming light and variable. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Christmas Day
 
 Showers. High near 63. Chance of precipitation is 80%.
Thursday Night
 
 Showers. Low around 51. Chance of precipitation is 90%.
Friday
 
 Showers. Mostly cloudy, with a high near 60.
Friday Night
 
 Showers likely, mainly before 10pm. Mostly cloudy, with a low around 44.
Saturday
 
 A slight chance of showers. Partly sunny, with a high near 61.
Saturday Night
 
 A slight chance of showers. Partly cloudy, with a low around 43.
Sunday
 
 Sunny, with a high near 64.
Sunday Night
 
 Partly cloudy, with a low around 44.
Monday
 
 A slight chance of showers. Mostly sunny, with a high near 67.

 

Forecast from NOAA-NWS for 3 Miles SW Fontana CA.