NAPERVILLE, ILLINOIS

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Elevation: 209 meters Latitude: 41 49N Longitude: 088 04W

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DAILY WEATHER AVERAGE - 22 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	-2.5 ^°C	0.2 ^°C	-5.7 ^°C	11.1 ^°C (2006)	(2008)
Dewpoint	-3.9 ^°C	-2.8 ^°C	-5.1 ^°C	10.6 ^°C (2006)	-15 ^°C (2004)
Humidity	80 ^%	90.6 ^%	66.8 ^%		51 ^% (2004)
Barometer	1017.9 ^hPa	1022.7 ^hPa	1012.9 ^hPa	1036.9 ^hPa (1998)	995.3 ^hPa (2007)
Wind Speed	16.4 ^km/h	26.4 ^km/h		38.9 ^km/h (2006)
Wind Gust		41.5 ^km/h		57.5 ^km/h (2006)
Precipitation	7.37 ^mm			29.97 ^mm (2006)

Weather Element	Average
Visibility	12.1 ^km
Wind Direction	SW (221.1 °)

Weather Element	Total
Heating Degree Days	21.1 (Base 18.3)

Total Years on Record: 21

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