National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Mid-Atlantic; Heavy Rain & Isolated Severe Thunderstorms in Southern California

Snow squalls are likely to cross the Lower Great Lakes this evening and the Ohio Valley through the interior Northeast/northern Mid-Atlantic overnight, before potentially reaching the I-95 corridor from D.C. to New York City early New Year’s Day morning. Heavy rain and isolated severe thunderstorms will impact coastal southern California including Los Angeles tonight into early on New Year's Day. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

Lat: 37.95°NLon: 121.88444°WElev: 1600.0ft.

NA

43°F

6°C

Humidity 100%
Wind Speed NNE 19 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 31 Dec 04:28 PM PST
Extended Forecast for

Pittsburg CA

  • This Afternoon

    This Afternoon: Rain. High near 50. East northeast wind around 8 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 50 °F

    Rain

  • Tonight

    Tonight: Rain. Low around 48. East wind 9 to 13 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 48 °F

    Rain

  • New Year's Day

    New Year's Day: Rain likely, mainly before 1pm. Mostly cloudy, with a high near 57. Southeast wind 9 to 15 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 57 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 49. Southeast wind around 8 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Chance Rain

  • Friday

    Friday: Rain likely, mainly after 4pm. Mostly cloudy, with a high near 57. East southeast wind 8 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 57 °F

    Chance Rain
    then Rain
    Likely

  • Friday Night

    Friday Night: Rain. Low around 56. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Rain

  • Saturday

    Saturday: Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 57. Chance of precipitation is 100%.

    High: 57 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Cloudy, with a low around 54.

    Low: 54 °F

    Showers

  • Sunday

    Sunday: Rain. Cloudy, with a high near 54.

    High: 54 °F

    Rain

Detailed Forecast

This Afternoon
Rain. High near 50. East northeast wind around 8 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain. Low around 48. East wind 9 to 13 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
New Year's Day
Rain likely, mainly before 1pm. Mostly cloudy, with a high near 57. Southeast wind 9 to 15 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 49. Southeast wind around 8 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain likely, mainly after 4pm. Mostly cloudy, with a high near 57. East southeast wind 8 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain. Low around 56. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 57. Chance of precipitation is 100%.
Saturday Night
Showers and possibly a thunderstorm. Cloudy, with a low around 54.
Sunday
Rain. Cloudy, with a high near 54.
Sunday Night
Rain. Mostly cloudy, with a low around 50.
Monday
Rain likely. Cloudy, with a high near 52.
Monday Night
Rain likely. Cloudy, with a low around 49.
Tuesday
A chance of rain. Mostly cloudy, with a high near 52.
Tuesday Night
A slight chance of rain. Partly cloudy, with a low around 44.
Wednesday
A chance of rain. Partly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Pittsburg CA
 38.04°N 121.87°W (Elev. 3 ft)
Last Update:
2:14 pm PST Dec 31, 2025
Forecast Valid:
5pm PST Dec 31, 2025-6pm PST Jan 7, 2026
 
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Additional Resources

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Chance of Precipitation