Winds W at 5 to 10 mph. The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands. Meanwhile, San Rafael’s winters are cold and short with highs of 59°F and lows of 42°F. Within 50 miles contains large variations in elevation (4,764 feet). We … The black line is the percentage chance that a given day is within the growing season. Lower dew points feel drier and higher dew points feel more humid. Get the monthly weather forecast for St. Helena, CA, including daily high/low, historical averages, to help you plan ahead. The chance of wet days in Saint Helena varies significantly throughout the year. 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). USA, CA #10. Jamestown or Half Tree Hollow - will be higher and rainfall lower). The growing season in Saint Helena typically lasts for 8.8 months (267 days), from around February 29 to around November 22, rarely starting before January 25 or after April 4, and rarely ending before November 1 or after December 19. Annual Weather Averages Near Jamestown. Also view: monthly average temperatures, precipitation, snow depth, wind speed, air quality and pollution. USA, CA #9. It is 721% greater than the overall U.S. average. Saint Helena is located near a large body of water (e.g., ocean, sea, or large lake). One still should be able to carry on ordinary outdoor activities. The perceived humidity level in Saint Helena, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages. On average, there are 263 sunny days per year in St. Helena. We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. NOAA National Weather Service National Weather Service. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year. The transitions to and from daylight saving time are indicated by the 'DST' labels. St Helena, Warwickshire, United Kingdom - Monthly weather averages including average high and low Temperature, Precipitation, Pressure, Wind Charts to assist you in planning your travel, holiday or an outdoor activity at St Helena, United Kingdom Average Weather during April in St. Helena (California), United States of America. support@__remove_this_part__weatherspark.com. A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The percentage of time spent in various temperature bands. Weather.com brings you the most accurate monthly weather forecast for with average/record and high/low temperatures, precipitation and more. Change Location . This page contains what we believe are the most scenic bike climbs in the California. The US average is 28 inches of snow per year. Saint Helena, CA Radar Maps. Jamestown Weather February Averages, Saint Helena. Mt. Lows in the mid 30s to upper 40s. The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands. See more current weather × Annual Weather Averages in Georgetown (Ascension Island) Based on weather reports collected during 1985–2015. Showing: All Year Climate & Weather Averages in Jamestown. Get the monthly weather forecast for St. Helena, CA, including daily high/low, historical averages, to help you plan ahead. St Helena & Islands weather averages for holidays in 2021/2022. The cool season lasts for 2.9 months, from November 24 to February 20, with an average daily high temperature below 61°F. In 2020, the shortest day is December 21, with 9 hours, 29 minutes of daylight; the longest day is June 20, with 14 hours, 51 minutes of daylight. The average minimum temperature (usually the minimum temperature is noted during the night) in St. Helena in September is 13.0°C (55.4°F). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night. ).Down the road, the laidback vibe at Clif Family Tasting Room beckons. The darkest day of the year is December 25, with an average of 2.0 kWh. Click on each chart for more information. Mostly clear. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night. Based on the tourism score, the best time of year to visit Saint Helena for warm-weather activities is from late June to mid September. This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. Averages are for Saint Helena Island, which is 4 miles from Jamestown. April is a dry month with an average of 29mm (1.1in) rain. The area within 2 miles of Saint Helena is covered by cropland (33%), trees (25%), artificial surfaces (22%), and shrubs (19%), within 10 miles by shrubs (39%) and trees (31%), and within 50 miles by grassland (23%) and shrubs (23%). Based on this score, the best time of year to visit Saint Helena for hot-weather activities is from mid June to late August, with a peak score in the third week of July. Climate (2011–Present) Petaluma Municipal Airport (18 miles) Take a look at our website widgetsAvailable free! July is the hottest month for St. Helena with an average high temperature of 88.8°, which ranks it as about average compared to other places in California. 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. Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more. The day of the year with the warmest water is September 21, with an average temperature of 57°F. The amount of rain in December is high with an average of 82mm (3.2in). Winds WNW at 10 to 20 mph. The weather guide for St Helena, St Helena & Islands shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Showing: All Year Climate & Weather Averages in Jamestown. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The amount of rain in July is extremely low with an average of 0mm (0.0in). Sunrise 7:17 am. 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). The clearer part of the year in Saint Helena begins around May 15 and lasts for 5.2 months, ending around October 22. St. Helena, California - Travel and vacation weather averages, current conditions and forecasts. The most rain falls during the 31 days centered around February 16, with an average total accumulation of 5.3 inches. The data show a few interesting facts that do not accord with island folklore: St. Helena, California detailed profile. We assume no responsibility for any decisions made on the basis of the content presented on this site. July is the hottest month for St. Helena with an average high temperature of 88.8°, which ranks it as about average compared to other places in California. The estimated value at Saint Helena is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Saint Helena and a given station. The City of St. Helena is seeking volunteers to serve on various boards, committees and co 12/08/2020 | COVID-19 Testing and Case Data Report for Tuesday, December 8, 2020 View all News Shortwave radiation includes visible light and ultraviolet radiation. Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. This report illustrates the typical weather in Saint Helena, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. See the current St. Helena, CA weather and a 5 day forecast. St. Helena averages 0 inches of snow per year. The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands.

This nation-wide website presents information about the weather and climate for almost every country around the world.Learn more. high temp. Santiago, Chile (5,986 miles away) and Shepparton, Australia (7,825 miles) are the far-away foreign places with temperatures most similar to Saint Helena (view comparison).
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Mauritius St. Helena gets some kind of precipitation, on average, 71 days per year. The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands. The average hourly temperature, color coded into bands. High / Low. Temperature 20 °C 68 °F; High Temperature 23 °C 73 °F; Low Temperature 17 °C 63 °F; Sunshine Hours 5 hours; Rainfall 60 mm; Rainfall Days 10 days Visibility 10 mi. The percentage of time spent at various humidity comfort levels, categorized by dew point. Today Mostly Clear. The St Helena Independent is available for sale on St Helena at the following stores. 62.1 ºF On average, it rains or snows a fair amount: 5 to 9 times per month. St. Helena, CA Weather. Saint Helena experiences extreme seasonal variation in monthly rainfall. July is the driest month. For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. The average minimum temperature (usually the minimum temperature is noted during the night) in St. Helena in December is 3.6°C (38.48°F). The average water temperature experiences some seasonal variation over the course of the year. : Hours of sunshine, Hi : Average high in ºF - Lo : Average low in ºF - Pre. Average precipitation in : Av. This has got to be one of the mildest climates whose averages are close to a typical "room temperature" much of the year. The average minimum temperature (usually the minimum temperature is noted during the night) in St. Helena in August is 14.4°C (57.92°F). 4%. Temperature 20 °C 68 °F; High Temperature 23 °C 73 °F; Low Temperature 17 °C 63 °F; Sunshine Hours 8 hours; Rainfall 50 mm; Rainfall Days 8 days At Gough Island, the summers are cool and mostly cloudy; the winters are long, cold, wet, and partly cloudy; and it is extremely windy year round. Low: 41°F. A Large Storm To Track Across The U.S. A large storm system will track from the Southwest into the … And where? The data show a few interesting facts that do not accord with island folklore: This section reports on the wide-area average surface temperature of that water. If you are having trouble, please contact Customer Service at [email protected], or by phone at 1-800-665-1362.Our business hours are 8:00am to 4:00pm CST. And where? The average hourly wind speed in Saint Helena experiences mild seasonal variation over the course of the year. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Average Weather during September in St. Helena (California), United States of America. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. Average High Average Low Record High Record Low Average Precipitation. The darker period of the year lasts for 3.6 months, from November 2 to February 20, with an average daily incident shortwave energy per square meter below 3.3 kWh. Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. high : Average high in ºF - Av.low : Average low in ºF - Av. USA, CA. : Average precipitation in inch - DP : Days with precipitation - Sun : Hours of sunshine, Monthly averages Saint HelenaLongitude: -122.47, Latitude: 38.51Average weather Saint Helena, CA - 94574, Monthly: 1981-2010 normalsHistory: 2007-2019. The hot season lasts for 4.0 months, from June 5 to October 5, with an average daily high temperature above 83°F. St. Helena. Annual Weather Averages in Helena. High Temp: 86 °F. Find Out More. High 59F. Chance of rainfall chart with likely precipitation and statistics in live rain gauge St Helena Rainfall Forecast, CA 94574 - WillyWeather 44 F Charles M. Schulz-Sonoma County Airport Station | Report. Jamestown Weather April Averages, Saint Helena. This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Mostly clear. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. The warmest month is July with an average maximum temperature of 33°C (92°F). Weather data is prone to errors, outages, and other defects. The predominant average hourly wind direction in Saint Helena varies throughout the year. Report Station. St. Helena, Saint Helena - Travel and vacation weather averages, current conditions and forecasts. Get the monthly weather forecast for St. Helena, CA, including daily high/low, historical averages, to help you plan ahead. Change Location. Current Weather St. Helena, CA Last Responded: 8:03pm CST, November 23, 2020. The average maximum temperature lies around 30.7°C (87.26°F). At 7.8 °C | 46.0 °F on average, January is the coldest month of the year. Search. The time of year with cooler water lasts for 3.1 months, from March 23 to June 27, with an average temperature below 53°F. St. Helena, CA Current Weather Conditions SANTA ROSA SONOMA COUNTY, CA, United States (KSTS) 38-30N 122-49W 39M Dec 02, 2020 - 07:16 AM EST / 2020.12.02 1216 UTC The time of year with warmer water lasts for 2.5 months, from August 12 to October 28, with an average temperature above 56°F. The windier part of the year lasts for 5.2 months, from March 13 to August 21, with average wind speeds of more than 6.7 miles per hour. Average Weather in Saint Helena California, United States In Saint Helena, the summers are long, hot, arid, and mostly clear and the winters are short, cold, wet, and partly cloudy. St. Helena, CA. Figures, provided by the St Helena Meteorological Station, are monthly averages taken at the station over the years 2001-2018 (North-west island temperatures - e.g. The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than. The figure below shows you a compact characterization of the entire year of hourly average temperatures. The wind is most often from the west for 7.6 months, from February 29 to October 17, with a peak percentage of 72% on July 30. The rainless period of the year lasts for 4.0 months, from May 27 to September 28. 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