Union County, Illinois
| Union County, Illinois | |
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Union County Courthouse in Jonesboro
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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 | January 2, 1818 |
| Seat | Jonesboro |
| Largest city | Anna |
| Area | |
| • Total | 422 sq mi (1,093 km2) |
| • Land | 413 sq mi (1,070 km2) |
| • Water | 8.7 sq mi (23 km2), 2.1% |
| Population | |
| • (2010) | 17,808 |
| • Density | 43/sq mi (17/km²) |
| Congressional district | 12th |
| Time zone | Central: UTC-6/-5 |
| Website | www |
| Jonesboro, 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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3.6
42
22
|
3.4
49
27
|
4.7
60
35
|
4.7
70
44
|
5.2
78
53
|
4.2
86
62
|
3.3
90
66
|
3.6
89
64
|
3.1
82
56
|
3.4
72
45
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4.8
58
36
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4.3
46
27
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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 |
|
91
6
−6
|
87
9
−3
|
120
16
2
|
119
21
7
|
133
26
12
|
107
30
17
|
83
32
19
|
91
32
18
|
80
28
13
|
86
22
7
|
121
14
2
|
...
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