JOLIET, ILLINOIS

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Elevation: 177 meters Latitude: 41 31N Longitude: 088 10W

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DAILY WEATHER AVERAGE - 18 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	-1.7 ^°C	1.8 ^°C	-6.7 ^°C	13 ^°C (2002)	(2013)
Dewpoint	-5 ^°C	-1.9 ^°C	-8.4 ^°C	12 ^°C (2002)	-19 ^°C (2013)
Humidity	78.7 ^%	90.3 ^%	65 ^%		45 ^% (2006)
Barometer	1017.3 ^hPa	1020.7 ^hPa	1013.9 ^hPa	1036.9 ^hPa (2005)	1001.4 ^hPa (2002)
Wind Speed	10.1 ^km/h	21.9 ^km/h		40.7 ^km/h (2002)
Wind Gust		39.6 ^km/h		68.6 ^km/h (2002)
Precipitation	20.07 ^mm			36.83 ^mm (2002)

Weather Element	Average
Visibility	13.2 ^km
Wind Direction	S (179.7 °)

Weather Element	Total
Heating Degree Days	20.8 (Base 18.3)

Total Years on Record: 15

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