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Signal Port, California Weather Forecast
Signal Port, California Weather
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Weather Forecast for Signal Port, California : Mendocino County
Issued: 1:10 am PST Dec 18, 2025 Latitude: 38.8290768 Longitude: -123.6155687 View on Google Maps

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Overnight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Mostly Cloudy on Overnight 50% chance of rain on Thursday 100% chance of rain on Friday 70% chance of rain on Saturday Rain on Sunday Rain on Monday Rain on Tuesday 70% chance of rain on Wednesday
Low: 49°F High: 55°F High: 57°F High: 54°F High: 56°F High: 54°F High: 52°F High: 54°F
Low: 53°F Low: 50°F Low: 52°F Low: 51°F Low: 48°F Low: 48°F  
Mostly Cloudy Rain Rain Rain Rain Rain Rain Rain
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Current Conditions at
UKIAH - (KUKI)
45°
Clear
Fog
as of 2:11 AM PST
Rel. Humidity: 100%
Dew Point: 45°F
Visibility: 1/2 Miles
Pressure: 30.15 in.
Flight Rule: IFR
Wind Data
Calm
Current Conditions at
SANTA ROSA - (KSTS)
41°
Mostly Clear
Fog
as of 1:53 AM PST
Rel. Humidity: 100%
Dew Point: 41°F
Visibility: 1/4 Miles
Pressure: 30.15 in.
Flight Rule: IFR
Wind Data
Calm
Current Conditions at
NAPA - (KAPC)
48°
Cloudy
as of 2:18 AM PST
Rel. Humidity: 100%
Dew Point: 48°F
Visibility: 7 Miles
Pressure: 30.15 in.
Flight Rule: LIFR
Wind Data
Calm
Cloud Level(s): Broken at 300ft, Solid Overcast at 1500ft
Current Conditions at
VACAVILLE - (KVCB)
54°
Cloudy
as of 2:29 AM PST
Rel. Humidity: 87%
Dew Point: 50°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: IFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 900ft
Mostly Cloudy on Overnight Overnight... Mostly cloudy, with a low around 49. North wind around 5 mph.
50% chance of rain Thursday Thursday... A 50 percent chance of rain after 10am. Cloudy, with a high near 55. Calm wind becoming southeast 5 to 9 mph in the morning. New precipitation amounts of less than a tenth of an inch possible.
80% chance of rain Thursday Night Thursday Night... Rain, mainly after 1am. Low around 53. South southeast wind around 9 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
100% chance of rain Friday Friday... Rain. High near 57. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
70% chance of rain Friday Night Friday Night... Rain likely, mainly before 10pm. Mostly cloudy, with a low around 50. North wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
70% chance of rain Saturday Saturday... Rain likely, mainly after 10am. Cloudy, with a high near 54. North northeast wind around 5 mph becoming east southeast in the afternoon. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
100% chance of rain Saturday Night Saturday Night... Rain. Low around 52. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Rain on Sunday Sunday... Rain. Cloudy, with a high near 56.
Rain on Sunday Night Sunday Night... Rain. Cloudy, with a low around 51.
Rain on Monday Monday... Rain. Mostly cloudy, with a high near 54.
70% chance of rain Monday Night Monday Night... Rain likely. Mostly cloudy, with a low around 48.
Rain on Tuesday Tuesday... Rain. Mostly cloudy, with a high near 52.
Rain on Tuesday Night Tuesday Night... Rain. Mostly cloudy, with a low around 48.
70% chance of rain Wednesday Wednesday... Rain likely. Mostly cloudy, with a high near 54.
Current Radar Image


Sun Almanac for Signal Port, California
Sunrise: 07:28 AM
Sunset: 4:55 PM
Civil Sunrise:06:58 AM
Civil Sunset: 5:25 PM
Nautical Sunrise: 06:25 AM
Nautical Sunset: 5:58 PM
Astro Sunrise: 05:52 AM
Astro Sunset: 6:31 PM
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