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City of Pittsburg, CAPittsburg, CA Weather Forecast
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| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
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| Sunny | Partly Cloudy | Mostly Cloudy | Mostly Clear | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Sunny | Mostly Clear |
| Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C | Hi: 100°FHi: 38°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C Lo: 59°FLo: 15°C | Hi: 89°FHi: 32°C Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C Lo: 57°FLo: 14°C | Hi: 80°FHi: 27°C Lo: 57°FLo: 14°C | Hi: 85°FHi: 29°C | Hi: 85°FHi: 29°C Lo: 59°FLo: 15°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 602 AM PDT Tue Sep 08 2026 
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Issued: 439 AM PDT Tue Sep 8 2026
Key Messages
Updated at 1130 PM PDT Mon Sep 7 2026- Warming and drying trend will bring widespread moderate to major HeatRisk through Thursday
Aviation
... (12Z TAFS) Issued at 410 AM PDT Tue Sep 8 2026
With light offshore flow the marine layer is struggling to form, and VFR conditions are expected through the day. There is a slight chance of low ceilings at the coastal terminals this morning, but any stratus that manages to form will be battling dry air and should clear by the early afternoon. Winds...