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Monsanto, California Weather Forecast
Monsanto, California Weather
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Weather Forecast for Monsanto, California : Contra Costa County
Issued: 12:26 am PST Dec 18, 2025 Latitude: 38.0260319 Longitude: -122.0555188 View on Google Maps

MouseOver for Detail Forecast
Overnight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Mostly Cloudy on Overnight 10% chance of rain on Thursday 80% chance of rain on Friday 80% chance of rain on Saturday Thunderstorms on Sunday 70% chance of rain on Monday 70% chance of rain on Tuesday 70% chance of rain on Wednesday
Low: 48°F High: 59°F High: 58°F High: 56°F High: 58°F High: 55°F High: 51°F High: 53°F
Low: 51°F Low: 53°F Low: 55°F Low: 53°F Low: 49°F Low: 49°F  
Mostly Cloudy Rain Rain Rain Thunderstorms Rain Rain Rain
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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
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
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
Mostly Cloudy on Overnight Overnight... Mostly cloudy, with a low around 48. Light southwest wind.

10% chance of rain Thursday Thursday... A 10 percent chance of rain after 4pm. Patchy dense fog before 10am. Otherwise, mostly cloudy, with a high near 59. Calm wind becoming west around 5 mph.

30% chance of rain Thursday Night Thursday Night... A 30 percent chance of rain, mainly after 10pm. Cloudy, with a low around 51. Southwest wind 3 to 5 mph.

80% chance of rain Friday Friday... Rain, mainly after 10am. High near 58. South wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

90% chance of rain Friday Night Friday Night... Rain, mainly before 4am. Low around 53. South southwest wind around 8 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

80% chance of rain Saturday Saturday... Rain, mainly after 10am. High near 56. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

90% chance of thunderstorms Saturday Night Saturday Night... Rain before 10pm, then showers and possibly a thunderstorm after 10pm. Low around 55. Chance of precipitation is 90%.

Thunderstorms on Sunday Sunday... Showers and possibly a thunderstorm. Cloudy, with a high near 58.

Rain on Sunday Night Sunday Night... Rain. Cloudy, with a low around 53.

70% chance of rain Monday Monday... Rain likely. Cloudy, with a high near 55.

70% chance of rain Monday Night Monday Night... Rain likely. Cloudy, with a low around 49.

70% chance of rain Tuesday Tuesday... Rain likely. Cloudy, with a high near 51.

Rain on Tuesday Night Tuesday Night... Rain. Cloudy, with a low around 49.

70% chance of rain Wednesday Wednesday... Rain likely. Cloudy, with a high near 53.

Current Radar Image


Sun Almanac for Monsanto, California
Sunrise: 07:19 AM
Sunset: 4:51 PM
Civil Sunrise:06:50 AM
Civil Sunset: 5:20 PM
Nautical Sunrise: 06:17 AM
Nautical Sunset: 5:53 PM
Astro Sunrise: 05:45 AM
Astro Sunset: 6:26 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.