MOUNT VERNON, ILLINOIS

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Elevation: 144 meters Latitude: 38 19N Longitude: 088 51W

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DAILY WEATHER AVERAGE - 20 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	0.8 ^°C	4.7 ^°C	-3.5 ^°C	17 ^°C (2013)	(2000)
Dewpoint	-4.1 ^°C	-0.6 ^°C	-5.6 ^°C	15 ^°C (2013)	-16 ^°C (2004)
Humidity	71.5 ^%	87.6 ^%	57.6 ^%		28 ^% (2004)
Barometer	1020.7 ^hPa	1024 ^hPa	1016.9 ^hPa	1032.2 ^hPa (2005)	1007.1 ^hPa (2011)
Wind Speed	10 ^km/h	21.6 ^km/h		37 ^km/h (2002)
Wind Gust		37.7 ^km/h		50.1 ^km/h (2002)
Precipitation	7.62 ^mm			11.68 ^mm (2013)

Weather Element	Average
Visibility	14.3 ^km
Wind Direction	SE (140.2 °)

Weather Element	Total
Heating Degree Days	17.8 (Base 18.3)
Growing Degree Days	1.5 (Base 10)

Total Years on Record: 20

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