ST. HELENA, CALIFORNIA

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Elevation: 170 feet Latitude: 38 26N Longitude: 122 25W

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DAILY WEATHER AVERAGE - DECEMBER 15

[ °C ] °F

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	43.7 ^°F	54.7 ^°F	34.2 ^°F	60.8 ^°F (2013)	26.6 ^°F (2013)
Dewpoint	38.8 ^°F	43.9 ^°F	32 ^°F	50 ^°F (2011)	23 ^°F (2015)
Humidity	86.6 ^%	100 ^%	61.6 ^%		25 ^% (2011)
Barometer	30.14 ⁱⁿ	30.20 ⁱⁿ	30.09 ⁱⁿ	30.40 ⁱⁿ (2013)	29.84 ⁱⁿ (2014)
Wind Speed	5 ^mph	12.9 ^mph		20.7 ^mph (2014)
Wind Gust		23 ^mph		31.1 ^mph (2014)
Precipitation	0.96 ⁱⁿ			2.74 ⁱⁿ (2014)

Weather Element	Average
Visibility	7.5 ^mi
Wind Direction	ESE (106.2 °)

Weather Element	Total
Heating Degree Days	20.6 (Base 18.3)

Total Years on Record: 5

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