Alexander County, Illinois
| Alexander County, Illinois | |
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U.S. Post Office and Court House in Cairo, Illinois
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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 | 1819 |
| Seat | Cairo |
| Largest city | Cairo |
| Area | |
| • Total | 253 sq mi (655 km2) |
| • Land | 236 sq mi (611 km2) |
| • Water | 17 sq mi (44 km2), 6.8% |
| Population | |
| • (2010) | 8,238 |
| • Density | 35/sq mi (14/km²) |
| Congressional district | 12th |
| Time zone | Central: UTC-6/-5 |
| Cairo, 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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3.2
41
26
|
3.6
48
30
|
4.4
58
39
|
4.7
69
50
|
4.8
78
59
|
4.2
86
67
|
4.4
90
71
|
3.6
87
69
|
3
81
61
|
3.4
71
49
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4.4
57
39
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4.2
46
30
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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 |
|
82
5
−3
|
90
9
−1
|
112
14
4
|
120
21
10
|
121
26
15
|
105
30
19
|
111
32
22
|
92
31
21
|
77
27
16
|
87
22
9
|
112
14
4
|
106
8
−1
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