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 - 31 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	1.6 ^°C	5.5 ^°C	-2.4 ^°C	21.1 ^°C (2004)	-13.3 ^°C (1998)
Dewpoint	-2.9 ^°C	-0.2 ^°C	-6.6 ^°C	14.4 ^°C (2010)	-17.2 ^°C (2014)
Humidity	73.6 ^%	87.8 ^%	54.5 ^%		31 ^% (2008)
Barometer	1021 ^hPa	1024.7 ^hPa	1017.3 ^hPa	1040.6 ^hPa (2014)	1004.1 ^hPa (2010)
Wind Speed	12.4 ^km/h	23.8 ^km/h		37 ^km/h (2008)
Wind Gust		45.4 ^km/h		51.8 ^km/h (2010)
Precipitation	11.18 ^mm			15.49 ^mm (2010)

Weather Element	Average
Visibility	13.4 ^km
Wind Direction	SSW (188.5 °)

Weather Element	Total
Heating Degree Days	16.8 (Base 18.3)
Growing Degree Days	3.6 (Base 10)

Total Years on Record: 21

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