National Weather Service Forecast for: Rosemont CA
Issued by: National Weather Service Sacramento, CA
Updated: 1:21 am PST Feb 2, 2026
 
Overnight

Overnight: Patchy dense fog after 4am. Otherwise, partly cloudy, with a low around 39. Calm wind.
Patchy Dense
Fog
 Monday

Monday: Areas of dense fog before 10am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 64. Calm wind.
Areas Dense
Fog then
Sunny
 Monday
Night
Monday Night: Patchy fog after 1am. Otherwise, increasing clouds, with a low around 41. Calm wind.
Mostly Clear
then Patchy
Fog
 Tuesday

Tuesday: Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 67. Calm wind becoming north northwest around 5 mph in the afternoon.
Patchy Fog
then Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 41. Calm wind.
Mostly Clear
then Patchy
Fog
 Wednesday

Wednesday: Sunny, with a high near 65.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 43.
Mostly Clear

 Thursday

Thursday: Mostly sunny, with a high near 66.
Mostly Sunny

 Thursday
Night
Thursday Night: Mostly cloudy, with a low around 45.
Mostly Cloudy
Lo 39 °F Hi 64 °F Lo 41 °F Hi 67 °F Lo 41 °F Hi 65 °F Lo 43 °F Hi 66 °F Lo 45 °F

Dense Fog Advisory
 

Overnight
 
 Patchy dense fog after 4am. Otherwise, partly cloudy, with a low around 39. Calm wind.
Monday
 
 Areas of dense fog before 10am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 64. Calm wind.
Monday Night
 
 Patchy fog after 1am. Otherwise, increasing clouds, with a low around 41. Calm wind.
Tuesday
 
 Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 67. Calm wind becoming north northwest around 5 mph in the afternoon.
Tuesday Night
 
 Patchy fog after 4am. Otherwise, mostly clear, with a low around 41. Calm wind.
Wednesday
 
 Sunny, with a high near 65.
Wednesday Night
 
 Mostly clear, with a low around 43.
Thursday
 
 Mostly sunny, with a high near 66.
Thursday Night
 
 Mostly cloudy, with a low around 45.
Friday
 
 Partly sunny, with a high near 65.
Friday Night
 
 Partly cloudy, with a low around 45.
Saturday
 
 Mostly sunny, with a high near 64.
Saturday Night
 
 Mostly cloudy, with a low around 46.
Sunday
 
 A chance of rain. Partly sunny, with a high near 64.

 

Forecast from NOAA-NWS for Rosemont CA.