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Guerneville Weather Forecast
| REST OF TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  | | | | | | | | | |  |
| Mostly Clear | Sunny | Mostly Clear | Sunny | Clear | Sunny | Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy |
| Lo: 65°FLo: 18°C | Hi: 91°FHi: 33°C | Lo: 65°FLo: 18°C | Hi: 91°FHi: 33°C | Lo: 61°FLo: 16°C | Hi: 97°FHi: 36°C | Lo: 56°FLo: 13°C | Hi: 90°FHi: 32°C Lo: 56°FLo: 13°C | Hi: 90°FHi: 32°C Lo: 56°FLo: 13°C | Hi: 87°FHi: 31°C Lo: 55°FLo: 13°C | Hi: 87°FHi: 31°C Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 902 PM PDT Sun Oct 04 2026 
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Issued: 1239 AM PDT Mon Oct 5 2026
Key Messages
Updated at 1213 PM PDT Sun Oct 4 2026- Hazardous heat conditions persist inland, never leave children or pets in unattended vehicles!
- Elevated fire weather conditions continue across the interior through Thursday
- Temperatures cool closer to normal for the end of the week into next weekend
Aviation
... (06Z TAFS) Issued at 944 PM PDT Sun Oct 4 2026
Confidence is mixed as to if stratus/fog will make it to the coastline tonight. Kept the stratus mention in for HAF but confidence is decreasi...