National Weather Service Forecast for: Rialto CA
Issued by: National Weather Service San Diego, CA
Updated: 1:40 am PST Dec 5, 2025
 
Overnight

Overnight: Clear, with a low around 45. North wind 5 to 10 mph.
Clear
 Friday

Friday: Sunny, with a high near 72. North wind around 10 mph, with gusts as high as 20 mph.
Sunny
 Friday
Night
Friday Night: Clear, with a low around 47. Northwest wind around 5 mph becoming calm.
Clear
 Saturday

Saturday: Sunny, with a high near 72. Calm wind becoming southwest around 5 mph.
Sunny
 Saturday
Night
Saturday Night: Clear, with a low around 49. Calm wind.
Clear
 Sunday

Sunday: Sunny, with a high near 76.
Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 51.
Mostly Clear
 Monday

Monday: Sunny, with a high near 79.
Sunny
 Monday
Night
Monday Night: Clear, with a low around 53.
Clear
Lo 45 °F Hi 72 °F Lo 47 °F Hi 72 °F Lo 49 °F Hi 76 °F Lo 51 °F Hi 79 °F Lo 53 °F

 

Overnight
 
 Clear, with a low around 45. North wind 5 to 10 mph.
Friday
 
 Sunny, with a high near 72. North wind around 10 mph, with gusts as high as 20 mph.
Friday Night
 
 Clear, with a low around 47. Northwest wind around 5 mph becoming calm.
Saturday
 
 Sunny, with a high near 72. Calm wind becoming southwest around 5 mph.
Saturday Night
 
 Clear, with a low around 49. Calm wind.
Sunday
 
 Sunny, with a high near 76.
Sunday Night
 
 Mostly clear, with a low around 51.
Monday
 
 Sunny, with a high near 79.
Monday Night
 
 Clear, with a low around 53.
Tuesday
 
 Sunny, with a high near 80.
Tuesday Night
 
 Mostly clear, with a low around 53.
Wednesday
 
 Sunny, with a high near 80.
Wednesday Night
 
 Clear, with a low around 54.
Thursday
 
 Sunny, with a high near 80.

 

Forecast from NOAA-NWS for Rialto CA.