ST. LOUIS - GATEWAY ARCH, MISSOURI

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

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DAILY WEATHER AVERAGE - 21 SEPTEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	18.3 ^°C	25.2 ^°C	12.6 ^°C	32.2 ^°C (2010)	6.1 ^°C (2000)
Dewpoint	12.6 ^°C	15.4 ^°C	9.8 ^°C	21.1 ^°C (2009)	0 ^°C (2014)
Humidity	73.2 ^%	95 ^%	43.6 ^%		29 ^% (1996)
Barometer	1017.3 ^hPa	1019.6 ^hPa	1014.9 ^hPa	1027.8 ^hPa (1997)	1006.4 ^hPa (2006)
Wind Speed	8.7 ^km/h	19.6 ^km/h		33.3 ^km/h (1996)
Wind Gust		35.9 ^km/h		51.8 ^km/h (1996)
Precipitation	4.57 ^mm			21.84 ^mm (2009)

Weather Element	Average
Visibility	12.9 ^km
Wind Direction	SE (132.7 °)

Total Years on Record: 20

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