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Monticello, California Weather Forecast
Monticello, California Weather
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Weather Forecast for Monticello, California : Napa County
Issued: 12:26 am PST Dec 18, 2025 Latitude: 38.5776843 Longitude: -122.207197 View on Google Maps

MouseOver for Detail Forecast
Overnight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Fog on Overnight Widespread Fog on Thursday 90% chance of rain on Friday 60% chance of rain on Saturday Rain on Sunday 70% chance of rain on Monday 70% chance of rain on Tuesday 70% chance of rain on Wednesday
Low: 48°F High: 57°F High: 59°F High: 57°F High: 58°F High: 54°F High: 52°F High: 51°F
Low: 54°F Low: 52°F Low: 54°F Low: 50°F Low: 47°F Low: 48°F  
Fog Widespread Fog Rain Rain Rain Rain Rain Rain
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Current Conditions at
VACAVILLE - (KVCB)
54°
Cloudy
as of 12:53 AM PST
Rel. Humidity: 87%
Dew Point: 50°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 1600ft
Current Conditions at
NAPA - (KAPC)
46°
Cloudy
Mist
as of 12:54 AM PST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 5 Miles
Pressure: 30.16 in.
Flight Rule: LIFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 200ft
Current Conditions at
TRAVIS AFB - (KSUU)
54°
Cloudy
Mist
as of 12:55 AM PST
Rel. Humidity: 87%
Dew Point: 50°F
Visibility: 4 Miles
Pressure: 30.14 in.
Flight Rule: IFR
Wind Data
3 MPH
280° West
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
CONCORD - (KCCR)
52°
Cloudy
Mist
as of 12:53 AM PST
Rel. Humidity: 100%
Dew Point: 52°F
Visibility: 5 Miles
Pressure: 30.16 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 1500ft
Fog on Overnight Overnight... Widespread dense fog. Otherwise, cloudy, with a low around 48. Calm wind.

Widespread Fog on Thursday Thursday... Widespread fog, mainly before 9am. Otherwise, partly sunny, with a high near 57. Light and variable wind.

60% chance of rain Thursday Night Thursday Night... Rain likely, mainly after 4am. Patchy fog after 8pm. Otherwise, mostly cloudy, with a steady temperature around 54. Calm wind. Chance of precipitation is 60%.

90% chance of rain Friday Friday... Rain. High near 59. South wind 6 to 8 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

80% chance of rain Friday Night Friday Night... Rain, mainly before 10pm. Low around 52. Southwest wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

60% chance of rain Saturday Saturday... Rain likely, mainly after 10am. Patchy fog before 1pm. Otherwise, mostly cloudy, with a high near 57. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

90% chance of rain Saturday Night Saturday Night... Rain. Low around 54. Chance of precipitation is 90%.

Rain on Sunday Sunday... Rain. Cloudy, with a high near 58.

Rain on Sunday Night Sunday Night... Rain. Cloudy, with a low around 50.

70% chance of rain Monday Monday... Rain likely. Mostly cloudy, with a high near 54.

70% chance of rain Monday Night Monday Night... Rain likely. Mostly cloudy, with a low around 47.

70% chance of rain Tuesday Tuesday... Rain likely. 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 51.

Current Radar Image


Sun Almanac for Monticello, California
Sunrise: 07:22 AM
Sunset: 4:50 PM
Civil Sunrise:06:52 AM
Civil Sunset: 5:20 PM
Nautical Sunrise: 06:18 AM
Nautical Sunset: 5:53 PM
Astro Sunrise: 05:46 AM
Astro Sunset: 6:25 PM
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