ST. LOUIS - GATEWAY ARCH, MISSOURI

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Elevation: 450 feet Latitude: 38 37N Longitude: 090 11W

WEATHER

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DAILY WEATHER AVERAGE - DECEMBER 11

[ °C ] °F

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	34.9 ^°F	44 ^°F	26 ^°F	63 ^°F (2007)	10.4 ^°F (2000)
Dewpoint	27.9 ^°F	34.2 ^°F	20.8 ^°F	59 ^°F (2007)	1 ^°F (2009)
Humidity	77 ^%	92 ^%	58.1 ^%		23 ^% (2009)
Barometer	30.14 ⁱⁿ	30.25 ⁱⁿ	30.03 ⁱⁿ	30.70 ⁱⁿ (2013)	29.55 ⁱⁿ (1996)
Wind Speed	7 ^mph	14.2 ^mph		28.8 ^mph (2000)
Wind Gust		28.6 ^mph		40.3 ^mph (2000)
Precipitation	0.37 ⁱⁿ			1.09 ⁱⁿ (2010)

Weather Element	Average
Visibility	8.2 ^mi
Wind Direction	SSE (172.3 °)

Weather Element	Total
Heating Degree Days	30 (Base 18.3)
Growing Degree Days	2.7 (Base 10)

Total Years on Record: 21

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