McHenry County, Illinois
| McHenry County, Illinois | ||
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Old McHenry County Courthouse in Woodstock
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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 | 1836 | |
| Named for | William McHenry | |
| Seat | ||
| Largest city | Crystal Lake | |
| Area | ||
| • Total | 611 sq mi (1,582 km2) | |
| • Land | 603 sq mi (1,562 km2) | |
| • Water | 7.6 sq mi (20 km2), 1.3% | |
| Population (est.) | ||
| • (2015) | 307,343 | |
| • Density | 512/sq mi (198/km²) | |
| Congressional districts | 6th, 14th | |
| Time zone | Central: UTC-6/-5 | |
| Website | www |
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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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1.5
28
11
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1.3
33
16
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2.4
45
26
|
3.7
59
37
|
4.1
71
47
|
4.6
81
57
|
3.9
85
62
|
4.5
82
60
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3.3
75
51
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2.6
63
39
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2.7
47
29
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2
33
17
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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 |
|
38
−2
−12
|
33
1
−9
|
61
7
−3
|
94
15
3
|
104
22
8
|
116
27
14
|
98
29
17
|
114
28
16
|
84
24
11
|
66
17
4
|
68
8
−2
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50
Wikipedia
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