62.1 ºF - The February weather guide for St Helena, St Helena & Islands shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute.Find out more about our data sources. A 40 percent chance of rain after 10am. St. Helena, CA Weather Forecast and Current Weather - Temperature, Rain, Snow, and other weather conditions St Helena wind forecast. Multiple locations were found. Get the monthly weather forecast for St. Helena, CA, including daily high/low, historical averages, to help you plan ahead. Partly sunny, with a high near 58. High 59F. St Helena, CA - Get the very latest weather forecast, including hour-by-hour views, the 10-day outlook, temperature, humidity, precipitation for your area. Patchy frost after 5am. Calm wind. Patchy fog between 10am and 11am. Showers, mainly before 4pm. Please select one of the following: Coastal Flood Advisory December 13, 07:00am until December 15, 01:00pm. Showers, mainly before 4pm. A chance of rain, mainly before 10am. Patchy frost after 5am. You can choose the units of measurement for displaying data - in Celsius or Fahrenheit. St Helena is in the Southern Hemisphere, north of the Tropic of Capricorn, which means the midday sun is directly overhead during the summer (see the article ‘ The shortest and longest days ’ below). See the current St. Helena, CA weather and a 5 day forecast. high temp. 99.0 ºF -Lowest max temperature Lowest max temp. Very mild (max 12°C on Thu morning, min 6°C on Fri night). A major winter storm may impact portions of the Mid-Atlantic and Northeast midweek. Light and variable wind. Patchy fog. Lows in the 50s to lower 60s. Want to know what the weather is now? Find the most current and reliable 7 day weather forecasts, storm alerts, reports and information for [city] with The Weather Network. Mostly cloudy, with a high near 57. Calm wind. In Saint Helena, the summers are long, hot, arid, and mostly clear and the winters are short, cold, wet, and partly cloudy. Get the forecast for today, tonight & tomorrow's weather for St. Helena, CA. Otherwise, sunny, with a high near 59. Viator; Airbnb; ALL; Expedia; Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec. UV Index 2 of 10. Please select one of the following: Coastal Flood Advisory December 13, 07:00am until December 15, 01:00pm. St. Helena, CA Current Weather Conditions. View the latest weather forecasts, maps, news and alerts on Yahoo Weather. St. Helena, CA climate is warm during summer when temperatures tend to be in the 70's and cold during winter when temperatures tend to be in the 40's. Light and variable wind. Otherwise, partly sunny, with a high near 59. Increasing clouds, with a low around 36. 6am PST Dec 13, 2020-6pm PST Dec 19, 2020, Coastal Flood Advisory in effect from December 13, 07:00 AM PST until December 15, 01:00 PM PST, Excessive Rainfall and Winter Weather Forecasts, Federal Emergency Management Agency (FEMA), National Oceanic and Atmospheric Administration. Over the course of the year, the temperature typically varies from 36°F to 90°F and is rarely below 27°F or above 100°F . NWS Winds W at 5 to 10 mph. Saint Helena 5 day forecast with weather outlook providing day and night summary including precipitation, high and low temperatures presented in Fahrenheit and Celsius, sky conditions, rain chance, sunrise, sunset, wind chill, and wind speed with direction. Current Weather St. Helena, CA Last Responded: 7:24pm CDT, September 20, 2020. The lowest temperature reading has been 37.04 degrees fahrenheit at 5:53 AM, while the highest temperature is 64.94 degrees fahrenheit at 12:53 PM. Otherwise, partly sunny, with a high near 59. A 20 percent chance of showers before 10pm. A chance of rain. Forecast Valid: 8am PST Dec 1, 2020-6pm PST Dec 7, 2020. Patchy fog between 10am and 11am. Temperature: 34.0 F (1.1 C) Dew Point: 32.0 F (0.0 C) Increasing clouds, with a low around 36. Today’s and tonight’s St. Helena, CA weather forecast, weather conditions and Doppler radar from The Weather Channel and Weather.com Average high temperature Av. 24°C sea temperature; Recommended for St Helena & Islands. The rain could be heavy at times. California, United States. Patchy frost before 9am. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the St Helena area. Areas of frost between 7am and 8am. Otherwise, mostly cloudy, with a low around 38. 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