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St. Helena
Weather averages
ClimateForecastNovemberDecember >>

St. Helena (CA) Climate by Month

The graphs below provide an overview of the climate in St. Helena (California), the United States of America. They present long-term patterns and averages of weather conditions over a 30-year period.

Average day and night temperature

The mean minimum and maximum temperatures over the year.

Monthly hours of sunshine

The average monthly total hours of sunshine over the year
* Data from: Healdsburg, the United States of America (36 KM, 22 Miles).

Daily percent of sunshine

The mean percent of hours of sunhours during the day over the year
* Data from: Healdsburg, the United States of America (36 KM, 22 Miles).

Monthly precipitation

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

Monthly rainy days

The average number of days each month with rain, snow, hail etc.

Forecast for St. Helena (CA)

Fri   Nov 15
16°C | 3°C
NW 11 km/h
clear and no rain

clear and no rain

hourly forecast
Sat   Nov 16
15°C | 0°C
N 4 km/h
partly cloudy and no rain

partly cloudy and no rain

hourly forecast
Sun   Nov 17
16°C | 2°C
W 14 km/h
0.5 mm
broken clouds and chance of slight rain

broken clouds and chance of slight rain

hourly forecast
5-Day Forecast 10-Day Forecast

The best time of year to visit St. Helena in the United States of America

During the months of April, 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:

  • Which months have the greatest rainfall in St. Helena?
    Most rainfall (rainy season) is seen in February and December.
  • Does St. Helena have a dry season?
    Yes, the months of June, July, August and September are very dry.
  • Which is the warmest month in St. Helena?
    July has an average maximum temperature of 32°C and is the warmest month of the year.
  • Which is the coldest month in St. Helena?
    The coldest month is December with an average maximum temperature of 14°C.
  • Which is the wettest month in St. Helena?
    December tops the wettest month list with 175 mm of rainfall.
  • Which is the driest month in St. Helena?
    August is the driest month with 0 mm of precipitation.
  • Which is the sunniest month in St. Helena?
    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.

     

     


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