National Weather Service Forecast for: San Martin CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:40 am PST Dec 5, 2025
 
Overnight

Overnight: Patchy frost after 4am. Otherwise, mostly clear, with a low around 37. Northwest wind around 6 mph.
Patchy Frost
 Friday

Friday: Patchy frost before 8am. Otherwise, sunny, with a high near 64. Light west northwest wind becoming north northwest 5 to 10 mph in the morning.
Patchy Frost
then Sunny
 Friday
Night
Friday Night: Mostly clear, with a low around 42. Calm wind becoming northwest 5 to 7 mph in the evening.
Mostly Clear
 Saturday

Saturday: Sunny, with a high near 66. North northwest wind 8 to 14 mph.
Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 43. North wind 3 to 6 mph.
Mostly Clear
 Sunday

Sunday: Mostly sunny, with a high near 68.
Mostly Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 44.
Mostly Clear
 Monday

Monday: Sunny, with a high near 68.
Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 44.
Mostly Clear
Lo 37 °F Hi 64 °F Lo 42 °F Hi 66 °F Lo 43 °F Hi 68 °F Lo 44 °F Hi 68 °F Lo 44 °F

 

Overnight
 
 Patchy frost after 4am. Otherwise, mostly clear, with a low around 37. Northwest wind around 6 mph.
Friday
 
 Patchy frost before 8am. Otherwise, sunny, with a high near 64. Light west northwest wind becoming north northwest 5 to 10 mph in the morning.
Friday Night
 
 Mostly clear, with a low around 42. Calm wind becoming northwest 5 to 7 mph in the evening.
Saturday
 
 Sunny, with a high near 66. North northwest wind 8 to 14 mph.
Saturday Night
 
 Mostly clear, with a low around 43. North wind 3 to 6 mph.
Sunday
 
 Mostly sunny, with a high near 68.
Sunday Night
 
 Mostly clear, with a low around 44.
Monday
 
 Sunny, with a high near 68.
Monday Night
 
 Mostly clear, with a low around 44.
Tuesday
 
 Mostly sunny, with a high near 70.
Tuesday Night
 
 Partly cloudy, with a low around 47.
Wednesday
 
 Mostly sunny, with a high near 71.
Wednesday Night
 
 Mostly clear, with a low around 46.
Thursday
 
 Sunny, with a high near 72.

 

Forecast from NOAA-NWS for San Martin CA.