Clay City, IL
Full City Profile · Illinois · Clay County County
3.0
/5.0
B
Good
744
Population
418/sq mi density
$53,750
Median Income
$29,155 per capita
$75,500
Home Value
$110,540 Zillow
$585
Median Rent
51.0% income on rent
55°F
Avg Temperature
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
C+
Economy
2.5 / 5.0
$53,750 median income, 4.7% unemployment
A+
Affordability
5.0 / 5.0
$75,500 home value, $585/mo rent
D
Education
1.5 / 5.0
6.6% bachelor's degree or higher
Clay City experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 30°F in January while summers reach 77°F in July. Annual precipitation totals 46.7 inches. The area receives 10.6 inches of snow annually.
Temperature
30°F Jan (-1°C)
77°F Jul (25°C)
| Annual Average | 55.1°F |
| 2% above US avg | |
| January Average | 30°F (-1°C) |
| July Average | 77°F (25°C) |
Geography
| Elevation | 435 ft (133 m) |
| Area | 0.7 sq mi (1.8 km²) |
| Population Density | 418/sq mi |
| Coordinates | 38.6858°N, 88.3486°W |
| Timezone | America/Chicago |
| County | Clay County County |
| Nearest Airport | Lawrenceville-Vincennes International (LWV) 40 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 41.1 / 100 |
| Social Vulnerability | 52.0 / 100 |
| Community Resilience | 88.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 3.2 in | Coldest |
| February | 35°F (1°C) | 2.6 in | Driest |
| March | 44°F (7°C) | 4.0 in | |
| April | 55°F (13°C) | 4.9 in | |
| May | 66°F (19°C) | 5.1 in | Wettest |
| June | 75°F (24°C) | 4.9 in | |
| July | 77°F (25°C) | 4.6 in | Warmest |
| August | 76°F (24°C) | 3.3 in | |
| September | 69°F (20°C) | 3.6 in | |
| October | 57°F (14°C) | 3.6 in | |
| November | 44°F (7°C) | 4.0 in | |
| December | 35°F (1°C) | 3.1 in |
Clay City has a seasonal temperature swing of 47°F / from 30°F in January to 77°F in July. Total annual precipitation is 46.7 inches, with May being the wettest month (5.1") and February the driest (2.6").