California · NWS MTR office

Pittsburg, CA weather

It is 53°F at BLACK DIAMOND as of Oct 28, 1:28 AM PDT. Overnight: Mostly Clear, low near 49°F. Forecast from the National Weather Service, issued Oct 28, 1:26 AM PDT.

Updated Oct 28, 2:18 AM PDT (snapshot)

Current conditions

Temperature

53°F

Mostly Clear

Wind

SSE 6 mph

Humidity 68% · dew point 43°F

Pressure · visibility

—

Visibility —

Observed at BLACK DIAMOND (PIBC1), Oct 28, 1:28 AM PDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Pittsburg forecast zone right now.

Around the NWS MTR forecast area

2 active alerts cover zones served by the MTR office near Pittsburg:

  • Coastal Flood Advisory (2)

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. California has 8 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Pittsburg (local time)
TimeTempForecastPrecip. chanceWind
Wed 4 AM50°FMostly Clear0%W 3 mph
Wed 5 AM50°FMostly Clear0%W 2 mph
Wed 6 AM50°FSunny0%W 2 mph
Wed 7 AM50°FSunny0%WSW 3 mph
Wed 8 AM50°FSunny0%SW 2 mph
Wed 9 AM53°FSunny0%WSW 3 mph
Wed 10 AM56°FSunny0%NNW 3 mph
Wed 11 AM60°FSunny0%NNW 3 mph
Wed 12 PM63°FSunny0%NNW 5 mph
Wed 1 PM66°FSunny0%NW 5 mph
Wed 2 PM68°FSunny0%WNW 5 mph
Wed 3 PM69°FSunny0%WNW 3 mph
Wed 4 PM69°FSunny0%W 3 mph
Wed 5 PM69°FSunny0%W 3 mph
Wed 6 PM67°FMostly Clear0%W 3 mph
Wed 7 PM63°FMostly Clear0%W 3 mph
Wed 8 PM59°FPartly Cloudy0%WSW 3 mph
Wed 9 PM58°FPartly Cloudy0%WSW 3 mph
Wed 10 PM56°FPartly Cloudy0%WSW 3 mph
Wed 11 PM56°FMostly Cloudy0%SW 2 mph
Thu 12 AM55°FMostly Cloudy0%SW 2 mph
Thu 1 AM55°FMostly Cloudy0%SW 2 mph
Thu 2 AM54°FMostly Cloudy0%SW 1 mph
Thu 3 AM53°FMostly Cloudy0%SW 1 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Pittsburg can differ.

7-day forecast

Overnight

Low 49°F

Mostly clear, with a low around 49. West wind around 3 mph.

Wednesday

High 70°F·Low 51°F

Sunny, with a high near 70. West northwest wind around 5 mph.

Wednesday Night: Partly cloudy, with a low around 51. West southwest wind 0 to 5 mph.

Thursday

High 67°F·Low 53°F

Partly sunny, with a high near 67. North northeast wind around 2 mph.

Thursday Night: Mostly cloudy, with a low around 53. West wind 2 to 6 mph.

Friday

High 68°F·Low 51°F

Mostly sunny, with a high near 68.

Friday Night: Partly cloudy, with a low around 51.

Saturday

High 64°F·Low 49°F

Partly sunny, with a high near 64.

Saturday Night: Partly cloudy, with a low around 49.

Sunday

High 65°F·Low 50°F

Sunny, with a high near 65.

Sunday Night: Mostly clear, with a low around 50.

Monday

High 66°F·Low 52°F

Mostly sunny, with a high near 66.

Monday Night: Mostly cloudy, with a low around 52.

Tuesday

High 66°F

A chance of rain after 10am. Mostly sunny, with a high near 66.

Nearby cities

Larger cities in the area

Other cities in Contra Costa County

See every city we cover in California, or check all active alerts.

About this forecast

Forecast office
Pittsburg is served by the National Weather Service MTR forecast office, forecast zone CAZ510, county zone CAC013.
Location used
The Census Bureau's internal point for Pittsburg (38.0168, -121.8969), in Contra Costa County. Population: 77,131 (2024 estimate), number 114 of the 296 California cities on this site.
Radar
Nearest NWS radar: KDAX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/38.0168,-121.8969 (forecast issued Oct 28, 1:26 AM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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