ROCK ISLAND, WASHINGTON

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Elevation: 1230 feet Latitude: 47 24N Longitude: 120 12W

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DAILY WEATHER AVERAGE - DECEMBER 7

[ °C ] °F

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	28.9 ^°F	33.5 ^°F	24.8 ^°F	48 ^°F (2008)	5 ^°F (2013)
Dewpoint	23.2 ^°F	26.2 ^°F	19.3 ^°F	37.9 ^°F (2008)	-6 ^°F (2009)
Humidity	80.4 ^%	90.1 ^%	68.4 ^%		32 ^% (2009)
Barometer	30.14 ⁱⁿ	30.26 ⁱⁿ	30.03 ⁱⁿ	30.55 ⁱⁿ (1995)	29.33 ⁱⁿ (2004)
Wind Speed	3.9 ^mph	9.6 ^mph		20.7 ^mph (2008)
Wind Gust		25.7 ^mph		27.6 ^mph (2008)
Precipitation	0.26 ⁱⁿ			0.67 ⁱⁿ (1996)

Weather Element	Average
Visibility	8.1 ^mi
Wind Direction	SE (140.5 °)

Weather Element	Total
Heating Degree Days	35.9 (Base 18.3)

Total Years on Record: 20

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