MOUNT VERNON, ILLINOIS

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

WEATHER

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DAILY WEATHER AVERAGE - 9 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	1.3 ^°C	6.2 ^°C	-3.6 ^°C	15 ^°C (2015)	(2005)
Dewpoint	-3.1 ^°C	0.9 ^°C	-5.8 ^°C	12 ^°C (1999)	-14 ^°C (2001)
Humidity	73.3 ^%	89.6 ^%	55.8 ^%		29 ^% (2001)
Barometer	1020.3 ^hPa	1024.4 ^hPa	1015.2 ^hPa	1034.9 ^hPa (1995)	989.5 ^hPa (2009)
Wind Speed	8.5 ^km/h	20 ^km/h		42.6 ^km/h (2009)
Wind Gust		36.9 ^km/h		76 ^km/h (2009)
Precipitation	21.59 ^mm			79.25 ^mm (1999)

Weather Element	Average
Visibility	14.3 ^km
Wind Direction	SE (135.4 °)

Weather Element	Total
Heating Degree Days	17.1 (Base 18.3)
Growing Degree Days	1.5 (Base 10)

Total Years on Record: 21

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