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United States of America

ST. HELENA, CALIFORNIA


Home > North America > United States > California
Elevation: 170 feet     Latitude: 38 26N     Longitude: 122 25W

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DAILY WEATHER AVERAGE - AUGUST 18
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[ °C ]   °F
Weather ElementAvgAvg HighAvg LowRecord HighRecord Low
Temperature 61.8 °F 78.8 °F 53.2 °F 82.4 °F (2015) 50 °F (2012)
Dewpoint 54.4 °F 57.7 °F 52.7 °F 59 °F (2011) 50 °F (2012)
Humidity 79.6 % 100 % 44.5 % 36 % (2012)
Barometer 29.93 in 29.98 in 29.89 in 30.03 in (2011) 29.83 in (2014)
Wind Speed 5.9 mph 13.5 mph 15 mph (2015)
Wind Gust 18.4 mph 20.7 mph (2012)
Precipitation --- --- ()
Weather ElementAverage
Visibility7.9 mi
Wind DirectionWSW (263.3 °)
Weather ElementTotal
Heating Degree Days1.5 (Base 18.3)
Cooling Degree Days1.8 (Base 18.3)
Growing Degree Days16 (Base 10)
Total Years on Record: 4
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