It is never particularly hot (as it often is in Southern California) and it is never particular cold (as it can be in some of the more mountains regions of the state). Thank you for reporting this station. The change in length of daylight between today and tomorrow is also listed when available. Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. Today’s and tonight’s St. Helena, CA weather forecast, weather conditions and Doppler radar from The Weather Channel and Weather.com Forecasts are available worldwide. Overview Livability Real Estate Rentals Demographics. St. Helena, CA Weather. Tomorrow's temperature is forecast to be WARMER than today. One still should be able to carry on ordinary outdoor activities. Here are some average weather facts we collected from our historical climate data: During the month of April and October you are most likely to experience good weather with pleasant average temperatures that fall between 20 degrees Celsius (68°F) and 25 degrees Celsius (77°F). Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the St Helena area. 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. synoptic; past 24 hours; this month; averages; Current. The horizon should be clearly defined and the brightest stars should be visible under good atmospheric conditions (i.e. Weather Wind Rainfall Sun Moon UV Tides Swell More. We recognize our responsibility to use data and technology for good. Tomorrow's Weather Forecast for St. Helena including an hourly forecast, humidity, wind, precipitation, and satellite map from weatherfarm.com. Saint Helena average temperature. Ordinary outdoor activities are not possible at this time without extra illumination. Saint Helena Weather set as local. Weather; Wind; Rainfall; Sun; Moon; UV; Tides; Swell; Warnings; Maps; Graphs; St Helena Wind Forecast. St. Helena, CA Current Weather Conditions. We will review the data in question. The first option will be automatically selected. Take control of your data. St Helena weather forecast updated daily. The time period when the sun is between 12 and 18 degrees below the horizon at either sunrise or sunset. 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). Mount Saint Helena Weather (Days 6-9): Mild with light rain (total 7mm) on Sun morning Becoming colder with a light covering of snow, mostly falling on Tue afternoonFreeze-thaw conditions (max 8°C on Sun morning, min -2°C on Tue morning)Winds decreasing (near gales from the WSW on Sun morning, light winds from the N by Tue night). 37.69°S 145.13°E 89m AMSL. Wind Forecast NOAA; Wind Real-Time ; St Helena wind forecast issued today at 2:29 am. The horizon is well defined and the outline of objects might be visible without artificial light. Considerable cloudiness with occasional rain showers. access_time 3:23 AM PST on December 13, 2020 (GMT -8) | Updated 43 seconds ago. Monthly averages Saint Helena Longitude: -122.47, Latitude: 38.51 Average weather Saint Helena, CA - 94574. St Helena, CA - Get the very latest weather forecast, including hour-by-hour views, the 10-day outlook, temperature, humidity, precipitation for your area. Let us know how you use weather information and forecasts to help manage decisions about your pet. Saint Helena is located in Northern California, a place which many people agree has some of the best weather in the entire world. Windfinder specializes in wind, waves, tides and weather reports & forecasts for wind related sports like kitesurfing, windsurfing, surfing, sailing, fishing or paragliding. Unit Settings Measurement preferences are saved. 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. Saint Helena Climate graph // Weather by Month. In January, the precipitation reaches its peak, with an average of 191 mm | 7.5 inch. Low 37F. SANTA ROSA SONOMA COUNTY, CA, United States (KSTS) 38-30N 122-49W 39M. Key findings . 2:29 pm. Low around 45F. Hazardous Weather Conditions Wind Advisory in effect from December 6, 11:00 PM PST until December 7, 11:00 AM PST Red Flag Warning in effect from December … Check out the weather around the world with our featured, global weather cams Viator; Airbnb; ALL; Expedia; Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec. St. Helena Is. Find local weather forecasts for St. Helena, United States throughout the world Use escape to clear. Chance of rain 90%. View the latest weather forecasts, maps, news and alerts on Yahoo Weather. 24°C sea temperature; Recommended for St Helena & Islands. In the beginning of morning astronomical twilight and at the end of astronomical twilight in the evening, sky illumination is very faint, and might be undetectable. St. Helena, CA Weather Follow. St. Helena, CA Severe Weather Alert star_ratehome. United States; CA; Napa County; St Helena; 1-Day 3-Day 5-Day. Democratic Republic of the Congo | Français, State of Vatican City (Holy See) | Italiano. In Saint Helena, the summers are long, hot, arid, and mostly clear and the winters are short, cold, wet, and partly cloudy. Forecast This forecast is based on the GFS model. Mostly clear skies. Find the most current and reliable 14 day weather forecasts, storm alerts, reports and information for Saint Helena, CA, US with The Weather Network. Use up and down arrows to change selection. Average Weather in Saint Helena California, United States. Observations. Temperature; Rainfall; Swell Height; Tide Height; Wind Speed; Distance; Pressure; 2 Now. Find the most current and reliable 7 day weather forecasts, storm alerts, reports and information for [city] with The Weather Network. The current weather report for Saint Helena CA, as of 2:53 AM PST THU DEC 3 2020, has a sky condition of Fair with the visibility of 9.00 miles. See the weather for Saint Helena, California with the help of our live and local weather cameras. 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