ST. HELENA, CALIFORNIA

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

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DAILY WEATHER AVERAGE - DECEMBER 19

[ °C ] °F

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	45.2 ^°F	57.7 ^°F	34.3 ^°F	66.2 ^°F (2011)	26.6 ^°F (2012)
Dewpoint	37.3 ^°F	47.3 ^°F	26.6 ^°F	66.2 ^°F (2011)	10.4 ^°F (2013)
Humidity	78.6 ^%	98.3 ^%	55.3 ^%		19 ^% (2012)
Barometer	30.06 ⁱⁿ	30.15 ⁱⁿ	29.99 ⁱⁿ	30.34 ⁱⁿ (2012)	29.76 ⁱⁿ (2013)
Wind Speed	4.6 ^mph	11.8 ^mph		13.8 ^mph (2013)
Wind Gust		19.6 ^mph		20.7 ^mph (2013)
Precipitation	0.15 ⁱⁿ			0.15 ⁱⁿ (2015)

Weather Element	Average
Visibility	9.1 ^mi
Wind Direction	SSE (170.1 °)

Weather Element	Total
Heating Degree Days	19.1 (Base 18.3)
Growing Degree Days	0.9 (Base 10)

Total Years on Record: 4

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