Monte Rio Weather Forecast

    • 51
    • 57

    Rain

    • 50
    • 56

    Rain

    • 51
    • 55

    Rain Showers

    • 48
    • 57

    Rain

    • 45
    • 56

    Rain Likely

    • 46
    • 52

    Rain

Today 18 Dec North Bay Interior Valleys

Mostly cloudy. Widespread fog in the Morning, then patchy fog in the afternoon. A chance of rain in the afternoon. Highs in the 50s. South Winds up to 5 Mph. Becoming southwest around 5 Mph in the afternoon.

Tonight 18 Dec North Bay Interior Valleys

Areas of fog. A chance of rain in the evening. Rain likely after midnight. Lows near 50. Southwest Winds up to 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Monte Rio Temperature Statistics

December Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (10.6 miles)

  • Lowest 4 December, 2025

    34 °F

  • Average December

    43.9 °F

  • Highest 3 December, 2025

    68 °F

Climate (2020–Present)

Santa Rosa, Santa Rosa Sonoma County Airport (10.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    45.5 °F

  • Average 2020–2025

    57.9 °F

  • Average High 2020–2025

    72.5 °F
Get WillyWeather+ to remove ads