ROCK ISLAND, ILLINOIS

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Elevation: 190 meters Latitude: 41 34N Longitude: 090 25W

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DAILY WEATHER AVERAGE - 18 DECEMBER

[ °F ] °C

Weather Element	Avg	Avg High	Avg Low	Record High	Record Low
Temperature	-3.5 ^°C	0.8 ^°C	-8.3 ^°C	13.3 ^°C (2002)	-20 ^°C (2005)
Dewpoint	-7.2 ^°C	-3.9 ^°C	-10.9 ^°C	11 ^°C (2002)	-22.2 ^°C (2002)
Humidity	76.6 ^%	89 ^%	61.5 ^%		44 ^% (2002)
Barometer	1017.3 ^hPa	1021.3 ^hPa	1013.5 ^hPa	1040 ^hPa (2005)	997 ^hPa (2002)
Wind Speed	17.7 ^km/h	28.5 ^km/h		44.4 ^km/h (1998)
Wind Gust		48.6 ^km/h		59.2 ^km/h (2015)
Precipitation	21.59 ^mm			86.11 ^mm (2002)

Weather Element	Average
Visibility	11.9 ^km
Wind Direction	SSW (202.9 °)

Weather Element	Total
Heating Degree Days	22.1 (Base 18.3)

Total Years on Record: 20

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