National Weather Service Forecast for: Arcata CA
Issued by: National Weather Service Eureka, CA
Updated: 1:10 am PST Dec 18, 2025
 
Overnight

Overnight: A 40 percent chance of rain. Cloudy, with a low around 47. Calm wind.
Chance Rain

 Thursday

Thursday: Rain likely, mainly before 1pm. Cloudy, with a high near 59. Breezy, with a south wind 7 to 16 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Rain Likely
and Breezy

 Thursday
Night
Thursday Night: Rain. Low around 53. Breezy, with a south wind 14 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Rain and
Breezy

 Friday

Friday: Rain. High near 57. Breezy, with a west southwest wind 9 to 16 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Rain and
Breezy

 Friday
Night
Friday Night: Rain likely, mainly before 10pm. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 42. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Rain Likely
then Chance
Rain and
Patchy Fog
 Saturday

Saturday: Rain likely, mainly after 4pm. Patchy fog before 10am. Otherwise, cloudy, with a high near 52. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain Likely
and Patchy
Fog
 Saturday
Night
Saturday Night: Rain. Low around 47. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Rain

 Sunday

Sunday: Showers and possibly a thunderstorm before 4pm, then rain and possibly a thunderstorm after 4pm. Cloudy, with a high near 56.
Showers

 Sunday
Night
Sunday Night: Rain. Cloudy, with a low around 46.
Rain
Lo 47 °F Hi 59 °F Lo 53 °F Hi 57 °F Lo 42 °F Hi 52 °F Lo 47 °F Hi 56 °F Lo 46 °F

Wind Advisory
 

Overnight
 
 A 40 percent chance of rain. Cloudy, with a low around 47. Calm wind.
Thursday
 
 Rain likely, mainly before 1pm. Cloudy, with a high near 59. Breezy, with a south wind 7 to 16 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
 
 Rain. Low around 53. Breezy, with a south wind 14 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
 
 Rain. High near 57. Breezy, with a west southwest wind 9 to 16 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday Night
 
 Rain likely, mainly before 10pm. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 42. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
 
 Rain likely, mainly after 4pm. Patchy fog before 10am. Otherwise, cloudy, with a high near 52. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
 
 Rain. Low around 47. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
 
 Showers and possibly a thunderstorm before 4pm, then rain and possibly a thunderstorm after 4pm. Cloudy, with a high near 56.
Sunday Night
 
 Rain. Cloudy, with a low around 46.
Monday
 
 Rain. Cloudy, with a high near 53.
Monday Night
 
 Rain likely. Mostly cloudy, with a low around 42.
Tuesday
 
 Rain likely. Mostly cloudy, with a high near 51.
Tuesday Night
 
 Rain likely. Cloudy, with a low around 43.
Wednesday
 
 Rain likely. Mostly cloudy, with a high near 54.

 

Forecast from NOAA-NWS for Arcata CA.