| National Weather Service Forecast for:
Guerneville CA Issued by: National Weather Service San Francisco Bay Area/Monterey, CA |
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| Updated: 1:26 am PDT Jun 22, 2026 | ||||||||||||||||||
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| Overnight |
Patchy fog. Otherwise, mostly cloudy, with a low around 51. Calm wind. |
| Monday |
Mostly cloudy through mid morning, then gradual clearing, with a high near 78. Calm wind becoming southwest 5 to 7 mph in the afternoon. |
| Monday Night |
Increasing clouds, with a low around 51. Light and variable wind. |
| Tuesday |
Mostly cloudy, then gradually becoming sunny, with a high near 78. Calm wind becoming southwest 5 to 7 mph in the afternoon. |
| Tuesday Night |
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 52. Southwest wind around 5 mph becoming calm in the evening. |
| Wednesday |
Mostly sunny, with a high near 80. |
| Wednesday Night |
Partly cloudy, with a low around 53. |
| Thursday |
Sunny, with a high near 84. |
| Thursday Night |
Mostly clear, with a low around 55. |
| Friday |
Sunny, with a high near 79. |
| Friday Night |
Mostly clear, with a low around 55. |
| Saturday |
Sunny, with a high near 79. |
| Saturday Night |
Mostly clear, with a low around 54. |
| Sunday |
Sunny, with a high near 83. |
Forecast from NOAA-NWS for Guerneville CA.
