Jo Daviess County
| Jo Daviess County, Illinois | |
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Rugged terrain in the county, part of the Driftless Area
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 Location in the U.S. state of Illinois |
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 Illinois's location in the U.S. |
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| 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 |
| Galena, Illinois | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Climate chart () | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| J | F | M | A | M | J | J | A | S | O | N | D |
|
1.1
27
9
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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
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2.6
45
27
|
1.6
32
16
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| Average max. and min. temperatures in °F | |||||||||||
| Precipitation totals in inches | |||||||||||
| Source: The Weather Channel | |||||||||||
| Metric conversion | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| J | F | M | A | M | J | J | A | S | O | N | D |
|
29
−3
−13
|
32
1
−10
|
58
7
−4
|
84
15
2
|
95
22
8
|
116
27
14
|
85
29
17
|
111
28
16
|
92
23
11
|
64
17
4
|
66
7
−3
|
...
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