National Weather Service Forecast for: Merced CA
Issued by: National Weather Service San Joaquin Valley/Hanford, CA
Updated: 12:57 am PST Dec 18, 2025
 
Overnight

Overnight: Areas of dense fog. Otherwise, cloudy, with a steady temperature around 49. Calm wind.
Areas Dense
Fog

 Thursday

Thursday: Areas of dense fog. Otherwise, mostly cloudy, with a high near 50. Calm wind.
Areas Dense
Fog

 Thursday
Night
Thursday Night: Patchy dense fog. Otherwise, mostly cloudy, with a low around 45. Calm wind.
Patchy Dense
Fog

 Friday

Friday: A 20 percent chance of rain after 10am. Areas of dense fog before 1pm. Otherwise, cloudy, with a high near 46. Calm wind becoming west southwest around 5 mph.
Slight Chance
Rain and
Areas Dense
Fog
 Friday
Night
Friday Night: A 50 percent chance of rain. Patchy fog before 2am. Otherwise, mostly cloudy, with a low around 46. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
and Patchy
Fog
 Saturday

Saturday: A 40 percent chance of rain. Cloudy, with a high near 46. South southeast wind around 5 mph.
Chance Rain

 Saturday
Night
Saturday Night: Rain likely, mainly after 10pm. Cloudy, with a low around 46. Southeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Rain Likely

 Sunday

Sunday: Rain likely before 10am, then showers likely and possibly a thunderstorm after 10am. Cloudy, with a high near 46. Southeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely

 Sunday
Night
Sunday Night: Showers likely and possibly a thunderstorm before 4am, then rain likely and possibly a thunderstorm after 4am. Cloudy, with a low around 46. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely
Lo 49 °F Hi 50 °F Lo 45 °F Hi 46 °F Lo 46 °F Hi 46 °F Lo 46 °F Hi 46 °F Lo 46 °F

Dense Fog Advisory
 

Overnight
 
 Areas of dense fog. Otherwise, cloudy, with a steady temperature around 49. Calm wind.
Thursday
 
 Areas of dense fog. Otherwise, mostly cloudy, with a high near 50. Calm wind.
Thursday Night
 
 Patchy dense fog. Otherwise, mostly cloudy, with a low around 45. Calm wind.
Friday
 
 A 20 percent chance of rain after 10am. Areas of dense fog before 1pm. Otherwise, cloudy, with a high near 46. Calm wind becoming west southwest around 5 mph.
Friday Night
 
 A 50 percent chance of rain. Patchy fog before 2am. Otherwise, mostly cloudy, with a low around 46. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Saturday
 
 A 40 percent chance of rain. Cloudy, with a high near 46. South southeast wind around 5 mph.
Saturday Night
 
 Rain likely, mainly after 10pm. Cloudy, with a low around 46. Southeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
 
 Rain likely before 10am, then showers likely and possibly a thunderstorm after 10am. Cloudy, with a high near 46. Southeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
 
 Showers likely and possibly a thunderstorm before 4am, then rain likely and possibly a thunderstorm after 4am. Cloudy, with a low around 46. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday
 
 Rain likely. Cloudy, with a high near 56. Southeast wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
 
 Rain likely. Cloudy, with a low around 51. Northeast wind around 5 mph becoming east southeast after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
 
 Rain likely. Cloudy, with a high near 55. Southeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
 Rain. Low around 52. South southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday
 
 Rain. High near 54. Southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

 

Forecast from NOAA-NWS for Merced CA.