ST. HELENA, CALIFORNIA

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Elevation: 52 meters Latitude: 38 26N Longitude: 122 25W

WEATHER

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DAILY WEATHER AVERAGE - 6 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	9.5 ^°C	14 ^°C	5.2 ^°C	18 ^°C (2014)	-3 ^°C (2011)
Dewpoint	7.7 ^°C	10.6 ^°C	3.4 ^°C	15 ^°C (2014)	-3 ^°C (2011)
Humidity	90.2 ^%	100 ^%	59.8 ^%		33 ^% (2011)
Barometer	1022.7 ^hPa	1024.7 ^hPa	1020.3 ^hPa	1030.5 ^hPa (2011)	1013.5 ^hPa (2013)
Wind Speed	5.3 ^km/h	15.6 ^km/h		22.2 ^km/h (2013)
Wind Gust		34.3 ^km/h		42.6 ^km/h (2013)
Precipitation	10.92 ^mm			14.73 ^mm (2013)

Weather Element	Average
Visibility	12.6 ^km
Wind Direction	ESE (109.4 °)

Weather Element	Total
Heating Degree Days	8.7 (Base 18.3)
Growing Degree Days	2.8 (Base 10)

Total Years on Record: 5

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