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Diablo, California Weather Forecast
Diablo, California Weather
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Weather Forecast for Diablo, California : Contra Costa County
Issued: 2:08 am PST Dec 18, 2025 Latitude: 37.8349258 Longitude: -121.9580149 View on Google Maps

MouseOver for Detail Forecast
Overnight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Patchy Fog on Overnight Morning Fog on Thursday 80% chance of rain on Friday 80% chance of rain on Saturday Rain on Sunday Rain on Monday 70% chance of rain on Tuesday 70% chance of rain on Wednesday
Low: 43°F High: 62°F High: 61°F High: 59°F High: 60°F High: 58°F High: 56°F High: 56°F
Low: 47°F Low: 52°F Low: 52°F Low: 52°F Low: 46°F Low: 46°F  
Patchy Fog Morning Fog Rain Rain Rain Rain Rain Rain
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Current Conditions at
CONCORD - (KCCR)
54°
Cloudy
Mist
as of 2:38 AM PST
Rel. Humidity: 93%
Dew Point: 52°F
Visibility: 5 Miles
Pressure: 30.15 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 1400ft
Current Conditions at
LIVERMORE - (KLVK)
54°
Clear
Fog
as of 2:30 AM PST
Rel. Humidity: 100%
Dew Point: 54°F
Visibility: 1/4 Miles
Pressure: 30.13 in.
Flight Rule: IFR
Wind Data
Calm
Current Conditions at
HAYWARD - (KHWD)
54°
Cloudy
Mist
as of 1:54 AM PST
Rel. Humidity: 93%
Dew Point: 52°F
Visibility: 5 Miles
Pressure: 30.15 in.
Flight Rule: LIFR
Wind Data
6 MPH
130° Southeast
Cloud Level(s): Solid Overcast at 400ft
Patchy Fog on Overnight Overnight... Patchy fog. Otherwise, cloudy, with a low around 43. Calm wind.
Morning Fog on Thursday Thursday... Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 62. Calm wind.
20% chance of rain Thursday Night Thursday Night... A 20 percent chance of rain after 10pm. Patchy fog between 9pm and 10pm. Otherwise, mostly cloudy, with a low around 47. Calm wind.
80% chance of rain Friday Friday... Rain, mainly after 10am. High near 61. South southwest wind 5 to 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
80% chance of rain Friday Night Friday Night... Rain, mainly before 10pm. Low around 52. South southwest wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
80% chance of rain Saturday Saturday... Rain, mainly after 10am. High near 59. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
90% chance of rain Saturday Night Saturday Night... Rain. Low around 52. Chance of precipitation is 90%.
Rain on Sunday Sunday... Rain. Cloudy, with a high near 60.
Rain on Sunday Night Sunday Night... Rain. Cloudy, with a low around 52.
Rain on Monday Monday... Rain. Cloudy, with a high near 58.
70% chance of rain Monday Night Monday Night... Rain likely. Cloudy, with a low around 46.
70% chance of rain Tuesday Tuesday... Rain likely. Cloudy, with a high near 56.
Rain on Tuesday Night Tuesday Night... Rain. Cloudy, with a low around 46.
70% chance of rain Wednesday Wednesday... Rain likely. Mostly cloudy, with a high near 56.
Sun Almanac for Diablo, California
Sunrise: 07:18 AM
Sunset: 4:51 PM
Civil Sunrise:06:49 AM
Civil Sunset: 5:20 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 5:53 PM
Astro Sunrise: 05:44 AM
Astro Sunset: 6:25 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.