Rock Island County, Illinois
| Rock Island County, Illinois | |
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Rock Island County Courthouse
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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 | 1831 |
| Seat | Rock Island |
| Largest city | Moline |
| Area | |
| • Total | 451 sq mi (1,168 km2) |
| • Land | 428 sq mi (1,109 km2) |
| • Water | 24 sq mi (62 km2), 5.2% |
| Population | |
| • (2010) | 147,546 |
| • Density | 345/sq mi (133/km²) |
| Congressional district | 17th |
| Time zone | Central: UTC-6/-5 |
| Website | www |
| Rock Island, Illinois | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Climate chart () | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| J | F | M | A | M | J | J | A | S | O | N | D |
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1.3
30
13
|
1.4
36
19
|
2.6
48
29
|
3.6
61
41
|
4.4
72
52
|
4.8
81
63
|
3
85
68
|
4.3
83
66
|
2.9
76
57
|
2.4
65
45
|
2.5
48
32
|
1.9
35
20
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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 |
|
33
−1
−11
|
36
2
−7
|
66
9
−2
|
92
16
5
|
113
22
11
|
121
27
17
|
76
29
20
|
109
28
19
|
74
24
14
|
61
18
7
|
63
9
0
|
49
...
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