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Petaluma Reservoir Weather Forecast
| REST OF TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Chance of Showers | Clear | Sunny | Mostly Clear | Sunny | Clear | Mostly Clear | Mostly Clear | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Clear |
| Hi: 76°FHi: 24°C | Lo: 56°FLo: 13°C | Hi: 76°FHi: 24°C | Lo: 56°FLo: 13°C | Hi: 87°FHi: 31°C | Lo: 56°FLo: 13°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 302 PM PDT Fri Aug 28 2026 
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Issued: 1254 PM PDT Fri Aug 28 2026
Key Messages
Updated at 1253 PM PDT Fri Aug 28 2026- Slight chance of rain showers through this afternoon with thunderstorm chances focused on the Central Coast, tapering off by this evening
- Cooling trend continues into early next week
Aviation
... (18Z TAFS) Issued at 1123 AM PDT Fri Aug 28 2026
VFR across all terminals, except for HAF where it will remain IFR until the early afternoon. Gentle to moderate onshore winds increase through the day and ease overnight. High level clouds associated with a ...