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 - 29 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	1.7 ^°C	6 ^°C	-3.1 ^°C	16.1 ^°C (2011)	-10.6 ^°C (1995)
Dewpoint	-3.2 ^°C	0 ^°C	-6.6 ^°C	8.3 ^°C (2002)	-15.6 ^°C (2008)
Humidity	72.1 ^%	88.1 ^%	55.7 ^%		29 ^% (2008)
Barometer	1019 ^hPa	1023 ^hPa	1014.9 ^hPa	1033.9 ^hPa (2009)	1003.4 ^hPa (1997)
Wind Speed	13.8 ^km/h	25.1 ^km/h		46.3 ^km/h (1998)
Wind Gust		39.6 ^km/h		57.5 ^km/h (1998)
Precipitation	2.03 ^mm			5.33 ^mm (2003)

Weather Element	Average
Visibility	13.5 ^km
Wind Direction	SSW (200.8 °)

Weather Element	Total
Heating Degree Days	16.9 (Base 18.3)
Growing Degree Days	0.3 (Base 10)

Total Years on Record: 21

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