ST. HELENA, CALIFORNIA

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

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DAILY WEATHER AVERAGE - 14 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	5.7 ^°C	12.4 ^°C	1.2 ^°C	14 ^°C (2013)	-3 ^°C (2013)
Dewpoint	3.1 ^°C	6 ^°C	0.4 ^°C	9 ^°C (2011)	-3 ^°C (2015)
Humidity	86 ^%	98.6 ^%	58.6 ^%		41 ^% (2012)
Barometer	1021.3 ^hPa	1024 ^hPa	1019 ^hPa	1030.8 ^hPa (2013)	1010.5 ^hPa (2012)
Wind Speed	6.9 ^km/h	18.8 ^km/h		25.9 ^km/h (2015)
Wind Gust		37.2 ^km/h		38.9 ^km/h (2015)
Precipitation	3.81 ^mm			3.81 ^mm (2014)

Weather Element	Average
Visibility	13.5 ^km
Wind Direction	SSE (150.2 °)

Weather Element	Total
Heating Degree Days	11.6 (Base 18.3)

Total Years on Record: 5

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