ST. HELENA, CALIFORNIA

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

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DAILY WEATHER AVERAGE - 7 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	8.4 ^°C	13.8 ^°C	3.4 ^°C	16 ^°C (2014)	-3 ^°C (2011)
Dewpoint	6.2 ^°C	10 ^°C	2.8 ^°C	14 ^°C (2014)	-6 ^°C (2011)
Humidity	88 ^%	100 ^%	59 ^%		38 ^% (2011)
Barometer	1022.7 ^hPa	1025.7 ^hPa	1020 ^hPa	1028.4 ^hPa (2011)	1013.9 ^hPa (2013)
Wind Speed	5.3 ^km/h	16.7 ^km/h		25.9 ^km/h (2013)
Wind Gust		40.7 ^km/h		40.7 ^km/h (2013)
Precipitation	---			--- ()

Weather Element	Average
Visibility	12.7 ^km
Wind Direction	SSE (150.8 °)

Weather Element	Total
Heating Degree Days	9.7 (Base 18.3)
Growing Degree Days	3.3 (Base 10)

Total Years on Record: 5

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