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Mendon, IL vs Rock City, IL

63
Mendon
Illinois
VS
-9.9%
69
Rock City
Illinois

Mendon is moderately more affordable than Rock City, with a 9.9% lower cost of living index. Mendon scores 63 compared to 69 for Rock City, where the US average is 100. This difference means residents of Rock City can expect to pay noticeably more for everyday expenses, housing, and services.

On the housing front, median rent in Mendon is $661/month compared to $845/month in Rock City — a 22% difference. Home values follow the same pattern: Mendon is more affordable at $108,500 median vs $124,000.

Median household income in Mendon is $62,778 compared to $70,000 in Rock City (-10.3%). While Rock City is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of Mendon spend roughly 12.6% of their income on rent, less than the 14.5% in Rock City.

Climate-wise, Mendon is notably warmer with an average of 53°F compared to 49.4°F in Rock City. Rock City receives more rainfall at 37.2" per year compared to 36.4" in Mendon.

Income & Cost

Cost of Living Index
Mendon
63
10% cheaper
Rock City
69
Median Household Income
Mendon
$62,778
Rock City
$70,000
10% higher

Housing

Median Rent
Mendon
$661
22% cheaper
Rock City
$845
Median Home Value
Mendon
$108,500
13% cheaper
Rock City
$124,000
Population
Mendon
1,131
Rock City
378

Salary Equivalency Calculator

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Climate

NOAA 30-year normals (1991-2020)

Avg Temp
Mendon 53°F
Rock City 49.4°F
Summer High
Mendon 86°F
Rock City 84°F
Winter Low
Mendon 19°F
Rock City 15°F
Rainfall
Mendon 36.4"
Rock City 37.2"
Rainy Days
Mendon 109d
Rock City 121d