National Weather Service Forecast for: 3 Miles WNW San Bernardino CA
Issued by: National Weather Service San Diego, CA
Updated: 12:05 pm PDT Jul 12, 2026
 
Tonight

Tonight: Partly cloudy, with a low around 68. Southwest wind around 5 mph becoming calm  in the evening.
Partly Cloudy

Monday

Monday: Partly sunny, with a high near 94. Calm wind becoming southwest around 5 mph in the afternoon.
Partly Sunny

Monday
Night
Monday Night: Partly cloudy, with a low around 68. Southwest wind around 5 mph becoming calm  in the evening.
Partly Cloudy

Tuesday

Tuesday: Mostly sunny, with a high near 100. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Mostly Sunny

Tuesday
Night
Tuesday Night: Mostly clear, with a low around 71. Southwest wind 5 to 10 mph becoming light and variable  in the evening.
Mostly Clear

Wednesday

Wednesday: Sunny, with a high near 105.
Sunny

Wednesday
Night
Wednesday Night: Mostly clear, with a low around 75.
Mostly Clear

Thursday

Thursday: A chance of showers after 11am.  Mostly sunny, with a high near 100.
Chance
Showers
Thursday
Night
Thursday Night: A slight chance of showers before 11pm.  Partly cloudy, with a low around 70.
Slight Chance
Showers then
Partly Cloudy
Lo 68 °F Hi 94 °F Lo 68 °F Hi 100 °F Lo 71 °F Hi 105 °F Lo 75 °F Hi 100 °F Lo 70 °F

Extreme Heat Watch
 

Tonight
 
Partly cloudy, with a low around 68. Southwest wind around 5 mph becoming calm in the evening.
Monday
 
Partly sunny, with a high near 94. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
 
Partly cloudy, with a low around 68. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
 
Mostly sunny, with a high near 100. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Tuesday Night
 
Mostly clear, with a low around 71. Southwest wind 5 to 10 mph becoming light and variable in the evening.
Wednesday
 
Sunny, with a high near 105.
Wednesday Night
 
Mostly clear, with a low around 75.
Thursday
 
A chance of showers after 11am. Mostly sunny, with a high near 100.
Thursday Night
 
A slight chance of showers before 11pm. Partly cloudy, with a low around 70.
Friday
 
A slight chance of showers after 11am. Mostly sunny, with a high near 94.
Friday Night
 
A slight chance of showers. Partly cloudy, with a low around 68.
Saturday
 
A slight chance of showers. Mostly sunny, with a high near 92.
Saturday Night
 
A slight chance of showers. Mostly clear, with a low around 67.
Sunday
 
Sunny, with a high near 92.

 

Forecast from NOAA-NWS for 3 Miles WNW San Bernardino CA.