National Weather Service Forecast for: Portola CA
Issued by: National Weather Service Reno, NV
Updated: 1:15 pm PST Dec 22, 2025
 
Tonight

Tonight: Rain, mainly before 10pm. Snow level 7900 feet lowering to 7200 feet after midnight . Low around 36. Southwest wind around 5 mph becoming north after midnight. Chance of precipitation is 90%.
Rain then
Chance Rain
 Tuesday

Tuesday: A 30 percent chance of rain, mainly after 1pm. Snow level 7200 feet. Mostly sunny, with a high near 52. South wind 5 to 15 mph, with gusts as high as 25 mph.
Chance Rain
 Tuesday
Night
Tuesday Night: Rain, mainly after 7pm. Snow level 7200 feet rising to 7800 feet after midnight. Low around 34. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Rain
 Wednesday

Wednesday: Rain and snow, becoming all rain after 10am. Snow level 6400 feet lowering to 5800 feet. High near 44. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Rain/Snow
then Rain
 Wednesday
Night
Wednesday Night: Rain. Snow level 6000 feet. Low around 33. South wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Rain
 Christmas
Day
Christmas Day: Rain and snow. Snow level 5400 feet. High near 41. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.
Rain/Snow
 Thursday
Night
Thursday Night: Snow. The snow could be heavy at times. Low around 27. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.
Heavy Snow
 Friday

Friday: Snow. The snow could be heavy at times. Cloudy, with a high near 37.
Heavy Snow
 Friday
Night
Friday Night: A chance of snow. Mostly cloudy, with a low around 18.
Chance Snow
Lo 36 °F Hi 52 °F Lo 34 °F Hi 44 °F Lo 33 °F Hi 41 °F Lo 27 °F Hi 37 °F Lo 18 °F

Winter Storm Warning
 

Tonight
 
 Rain, mainly before 10pm. Snow level 7900 feet lowering to 7200 feet after midnight . Low around 36. Southwest wind around 5 mph becoming north after midnight. Chance of precipitation is 90%.
Tuesday
 
 A 30 percent chance of rain, mainly after 1pm. Snow level 7200 feet. Mostly sunny, with a high near 52. South wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
 
 Rain, mainly after 7pm. Snow level 7200 feet rising to 7800 feet after midnight. Low around 34. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
 
 Rain and snow, becoming all rain after 10am. Snow level 6400 feet lowering to 5800 feet. High near 44. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday Night
 
 Rain. Snow level 6000 feet. Low around 33. South wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Christmas Day
 
 Rain and snow. Snow level 5400 feet. High near 41. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.
Thursday Night
 
 Snow. The snow could be heavy at times. Low around 27. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.
Friday
 
 Snow. The snow could be heavy at times. Cloudy, with a high near 37.
Friday Night
 
 A chance of snow. Mostly cloudy, with a low around 18.
Saturday
 
 Mostly sunny, with a high near 38.
Saturday Night
 
 Partly cloudy, with a low around 14.
Sunday
 
 Mostly sunny, with a high near 41.
Sunday Night
 
 Partly cloudy, with a low around 16.
Monday
 
 Sunny, with a high near 45.

 

Forecast from NOAA-NWS for Portola CA.