LEMONT, PENNSYLVANIA

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Elevation: 357 meters Latitude: 40 48N Longitude: 077 52W

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DAILY WEATHER AVERAGE - 9 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	-0.1 ^°C	3.6 ^°C	-3.8 ^°C	12 ^°C (1999)	-13 ^°C (2002)
Dewpoint	-4.8 ^°C	-1.7 ^°C	-7.8 ^°C	7 ^°C (2008)	-21.2 ^°C (2000)
Humidity	73.2 ^%	90.4 ^%	52.9 ^%		4 ^% (2000)
Barometer	1020 ^hPa	1024 ^hPa	1015.2 ^hPa	1034.9 ^hPa (2002)	985.4 ^hPa (2009)
Wind Speed	8.9 ^km/h	22.9 ^km/h		53.8 ^km/h (2009)
Wind Gust		39.3 ^km/h		72.3 ^km/h (2009)
Precipitation	10.67 ^mm			24.38 ^mm (2009)

Weather Element	Average
Visibility	17.1 ^km
Wind Direction	SSE (162.8 °)

Weather Element	Total
Heating Degree Days	18.5 (Base 18.3)

Total Years on Record: 21

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