Best year time to visit Guerneville

General weather information about Guerneville

Average annual temperature is 14.8 °C

Absolute maximum temperature: 41.3 °C

Absolute minimum temperature: -0.2 °C

Number of sunny days: 256 days

Number of rainy days: 109 days

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* Weather data for Guerneville United States is based on climate observations for 2026 year

Guerneville air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)22.022.019.130.830.733.441.339.733.435.525.921.0
Average daytime temperature (°C)15.014.913.620.222.424.433.431.626.325.619.316.5
Average temperature (°C)9.58.48.412.915.317.122.922.118.417.412.911.3
Average night temperature (°C)6.04.14.87.310.111.514.415.313.312.38.68.2
Absolute minimum temperature (°C)0.4-0.20.62.76.39.411.111.89.84.22.64.5

Guerneville monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.014.013.011.010.09.0
Daylight mean duration (h)9.810.812.013.214.314.814.513.612.411.210.19.5
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)5.68.07.911.211.312.013.211.910.58.47.65.4
Precipitation (mm)4801023992552000926102273
Sunny days13159242229313025221917
Rainy days18132269101591114
Snow days000000000000

Guerneville - weather forecast by months

Guerneville weather in januaryGuerneville weather in februaryGuerneville weather in marchGuerneville weather in aprilGuerneville weather in mayGuerneville weather in juneGuerneville weather in julyGuerneville weather in augustGuerneville weather in septemberGuerneville weather in octoberGuerneville weather in novemberGuerneville weather in december

Best time to visit Guerneville:

The best time to visit Guerneville during the most sunny months:

  • June — 12.0(h)
  • July — 13.2(h)
  • August — 11.9(h)

The largest precipitation sum in Guerneville is at

  • January — 480(mm)
  • March — 399(mm)
  • December — 273(mm)

    • Weather forecast in the closest to Guerneville admin centers

    Weather forecast in the closest towns to Guerneville

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    Frequently asked questions

    When is the best time to visit Guerneville?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Guerneville.
    What is the weather like in Guerneville?
    See average temperature, rainfall and daylight hours for Guerneville by month in the table above.
    How many sunny days does Guerneville have?
    The monthly weather statistics above show sunshine and rainfall patterns for Guerneville throughout the year.