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Jo Daviess County, Illinois

Jo Daviess County, Illinois
Jo Daviess County IL U.S. 20 terrain1.JPG
Rugged terrain in the county, part of the Driftless Area
Map of Illinois highlighting Jo Daviess County
Location in the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location in the U.S.
Founded 1827
Named for Joseph Hamilton Daveiss
Seat Galena
Largest city Galena
Area
 • Total 619 sq mi (1,603 km2)
 • Land 601 sq mi (1,557 km2)
 • Water 18 sq mi (47 km2), 2.9%
Population
 • (2010) 22,691
 • Density 38/sq mi (15/km²)
Congressional district 17th
Time zone Central: UTC-6/-5
Website www.jodaviess.org
Galena, Illinois
Climate chart ()
J F M A M J J A S O N D
 
 
1.1
 
 
27
9
 
 
1.3
 
 
33
14
 
 
2.3
 
 
45
25
 
 
3.3
 
 
59
36
 
 
3.7
 
 
71
47
 
 
4.6
 
 
81
57
 
 
3.3
 
 
84
62
 
 
4.4
 
 
82
60
 
 
3.6
 
 
74
51
 
 
2.5
 
 
62
39
 
 
2.6
 
 
45
27
 
 
1.6
 
 
32
16
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel
J F M A M J J A S O N D
 
 
1.1
 
 
27
9
 
 
1.3
 
 
33
14
 
 
2.3
 
 
45
25
 
 
3.3
 
 
59
36
 
 
3.7
 
 
71
47
 
 
4.6
 
 
81
57
 
 
3.3
 
 
84
62
 
 
4.4
 
 
82
60
 
 
3.6
 
 
74
51
 
 
2.5
 
 
62
39
 
 
2.6
 
 
45
27
 
 
1.6
 
 
32
16
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel