What is today's weather forecast for Guerneville, CA?

Today's forecast for Guerneville shows a high of 53 degrees and a low of 44 degrees Fahrenheit. Patchy dense fog before 11am.

What is the 7-day weather forecast for Guerneville, CA?

The 7-day forecast for Guerneville shows highs from 53 to 64 degrees and lows from 44 to 54 degrees Fahrenheit. Expect precipitation on 6 days with chances of 20% or higher.

Will it rain in Guerneville, CA this week?

Yes, rain is possible in Guerneville this week. Precipitation chances: Monday (20% chance), Tuesday (80% chance), Wednesday (60% chance), Thursday (50% chance), Friday (50% chance), Saturday (50% chance).

How accurate is the Guerneville weather forecast?

WeatherForYou provides highly accurate Guerneville forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Guerneville, CA Weather Forecast and Current Conditions

WEATHER ALERTS - Dense Fog Advisory

Current Conditions From Nearby Local Station

Switch to Metric Units

41°F
Feels Like 41°F

Humidity 94% Dew Point 39°F Wind Calm Barometer 30.18 in.

Solar Rad 9 w/m²

Report from a personal weather station 1.7 mi. W of central Guerneville
at 7:58 AM Sun, Dec 14, 2025

Point Forecast at a Glance

SunDec 14

MonDec 15

TueDec 16

40%

WedDec 17

60%

ThuDec 18

50%

FriDec 19

50%

SatDec 20

50%

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

High temperatures remain relatively stable through the week, ranging from 53°F to 64°F. Unsettled weather expected with rain likely on at least 6 days.

Climate Context

This week's forecast shows temperatures running 2°F above the historical average for December. Normal highs for this period are around 57°F with lows around 39°F.

This Date in Weather History

1924 - The temperature at Helena, MT, plunged 79 degrees in 24 hours, and 88 degrees in 34 hours. The mercury plummeted from 63 above to 25 below zero. At Fairfield MT the temperature plunged 84 degrees in just 12 hours, from 63 at Noon to 21 below zero at midnight.

Guerneville, CA 7 Day Weather Forecast Details

Sunday Dec 14

Day: Patchy dense fog before 11am. Otherwise, mostly sunny, with a high near 53. Calm wind becoming southwest around 6 mph in the afternoon.

Night: Patchy dense fog between 9pm and 4am. Otherwise, mostly cloudy, with a low around 44. Light west wind.

Monday Dec 15

Day: Patchy fog between 7am and 11am. Otherwise, partly sunny, with a high near 64. Calm wind becoming west around 5 mph in the afternoon.

Night: A 20 percent chance of rain after 10pm. Increasing clouds, with a low around 52. Southwest wind around 5 mph.

Tuesday Dec 16

Day: A 40 percent chance of rain, mainly after 10am. Patchy dense fog before 10am. Otherwise, mostly cloudy, with a high near 62. West wind 3 to 6 mph. New precipitation amounts of less than a tenth of an inch possible.

Night: Rain. Patchy fog after 4am. Low around 54. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday Dec 17

Day: Rain likely, mainly before 10am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 60. Chance of precipitation is 60%.

Night: A chance of rain, mainly after 10pm. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 46.

Thursday Dec 18

Day: A chance of rain. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 57.

Night: Rain. Patchy fog after 1am. Otherwise, cloudy, with a low around 51.

Friday Dec 19

Day: Rain. Cloudy, with a high near 57.

Night: Rain likely. Patchy fog. Otherwise, cloudy, with a low around 47.

Saturday Dec 20

Day: A chance of rain. Areas of fog. Otherwise, mostly cloudy, with a high near 57.

About Guerneville, CA

Guerneville () is an unincorporated community and census-designated place (CDP) in the Russian River Valley of Sonoma County, California, United States. The town is historically known as a logging community. It was founded by the Guerne family in the 1850s. In the 21st century, Guerneville is also known for its natural environment, liberal atmosphere, and proximity to wine-tasting and redwood forests.

Content from Wikipedia, licensed under CC BY-SA 3.0.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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