ST. LOUIS - GATEWAY ARCH, MISSOURI

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Elevation: 137 meters Latitude: 38 37N Longitude: 090 11W

WEATHER

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DAILY WEATHER AVERAGE - 30 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	2.6 ^°C	6.3 ^°C	-1.7 ^°C	18.9 ^°C (2002)	-13.9 ^°C (1998)
Dewpoint	-1.9 ^°C	0.7 ^°C	-4 ^°C	14 ^°C (2002)	-14.4 ^°C (2008)
Humidity	74.4 ^%	89.5 ^%	58.5 ^%		23 ^% (2008)
Barometer	1018.3 ^hPa	1023 ^hPa	1014.6 ^hPa	1041.3 ^hPa (2014)	1001.4 ^hPa (2011)
Wind Speed	13.4 ^km/h	23.3 ^km/h		46.3 ^km/h (2008)
Wind Gust		42.3 ^km/h		61.2 ^km/h (2008)
Precipitation	6.6 ^mm			17.53 ^mm (2002)

Weather Element	Average
Visibility	12.7 ^km
Wind Direction	S (181.6 °)

Weather Element	Total
Heating Degree Days	16.1 (Base 18.3)
Growing Degree Days	1.3 (Base 10)

Total Years on Record: 20

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