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Monte Rio (CA) Climate by Month

The temperature in Monte Rio can vary greatly throughout the year. The temperatures shift from warm to mild. It also has a notably wet climate with much precipitation. Let's now guide you through the climate details for a complete overview.

Average day and night temperature

Depending on the time of the year, temperatures range from comfortable to moderate in Monte Rio. Average daytime temperatures range from a comfortable 27°C in July, the warmest time of the year, to a moderate 14°C during cooler months like December. At night, temperatures typically average around 4°C during these months.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Monte Rio has a relatively rainy climate with high precipitation levels, averaging 1129 mm of rainfall annually. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, December receives heavy rainfall, averaging 251 mm of precipitation, recorded across 14 rainy days. In contrast, the drier season, July brings less rainfall, with 1.2 mm over 2 rainy days.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

Seasonal changes in sunshine hours are quite dramatic in Monte Rio. While May receives considerable daily sunshine with up to 10.3 hours, December marks the darkest time of the year, where sunshine is scarce with only 5.3 hours of sunlight per day.

Monthly hours of sunshine

Data from: Healdsburg, the United States of America (20 KM, 12 Miles).

Daily hours of sunshine

Data from: Healdsburg, the United States of America (20 KM, 12 Miles).

The best time of year to visit Monte Rio in the United States of America

During the months of May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in Monte Rio?
    The hottest season / summer takes place in June, July, August and September.
  • Which months have the greatest rainfall in Monte Rio?
    Most rainfall (rainy season) is seen in January, February, March and December.
  • Does Monte Rio have a dry season?
    Yes, the months of June, July, August and September are very dry.
  • Which is the warmest month in Monte Rio?
    July has an average maximum temperature of 27°C and is the warmest month of the year.
  • Which is the coldest month in Monte Rio?
    The coldest month is December with an average maximum temperature of 14°C.
  • Which is the wettest month in Monte Rio?
    December tops the wettest month list with 251 mm of rainfall.
  • Which is the driest month in Monte Rio?
    July is the driest month with 1 mm of precipitation.
  • Which is the sunniest month in Monte Rio?
    May is the sunniest month with an average of 310 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Monte Rio (CA)

    Sat   Nov 23
    15°C | 6°C
    SW 11 km/h
    1.4 mm
    partly cloudy and rain

    partly cloudy and rain

    Sun   Nov 24
    13°C | 5°C
    S 11 km/h
    19 mm
    overcast and heavy rain

    overcast and heavy rain

    Mon   Nov 25
    15°C | 9°C
    SW 7 km/h
    3.6 mm
    broken clouds and slight rain

    broken clouds and slight rain