Hartford, IL
Full City Profile · Illinois · St. Louis city County
2.6
/5.0
C+
Fair
1,456
Population
280/sq mi density
$39,364
Median Income
$26,859 per capita
$65,800
Home Value
$83,138 Zillow
$925
Median Rent
47.0% income on rent
56°F
Avg Temperature
87
Violent Crime/100K
1,569 property/100K
C+
Overall
2.6 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Economy
2.8 / 5.0
$39,364 median income, 6.3% unemployment
A+
Affordability
5.0 / 5.0
$65,800 home value, $925/mo rent
F
Safety
1.0 / 5.0
87 violent crimes/100K
D
Education
1.6 / 5.0
7.6% bachelor's degree or higher
Hartford enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 30°F in January while summers reach 78°F in July. Annual precipitation totals 45.8 inches. The area receives 10.8 inches of snow annually.
Temperature
30°F Jan (-1°C)
78°F Jul (26°C)
| Annual Average | 55.7°F |
| 3% above US avg | |
| January Average | 30°F (-1°C) |
| July Average | 78°F (26°C) |
Geography
| Elevation | 428 ft (130 m) |
| Area | 4.9 sq mi (12.6 km²) |
| Population Density | 280/sq mi |
| Coordinates | 38.8131°N, 90.0921°W |
| Timezone | America/Chicago |
| County | St. Louis city County |
| Nearest Airport | St Louis Regional (ALN) 6 miles away |
Precipitation & Snow
Air Quality
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0419 ppm |
| NO₂ (Nitrogen Dioxide) | 15.1 ppb |
| SO₂ (Sulfur Dioxide) | 1.03 ppb |
| CO (Carbon Monoxide) | 0.28 ppm |
| PM2.5 (Fine Particles) | 10.1 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.7 / 100 |
| Social Vulnerability | 71.9 / 100 |
| Community Resilience | 61.0 / 100 |
Hazard Breakdown
| Tornado | Very High |
| Hurricane | Very Low |
| Earthquake | Relatively High |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Very High |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | No Rating |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 2.8 in | Coldest |
| February | 35°F (1°C) | 2.3 in | Driest |
| March | 44°F (7°C) | 3.5 in | |
| April | 56°F (13°C) | 5.1 in | |
| May | 66°F (19°C) | 5.5 in | Wettest |
| June | 75°F (24°C) | 4.7 in | |
| July | 78°F (26°C) | 4.8 in | Warmest |
| August | 77°F (25°C) | 4.0 in | |
| September | 70°F (21°C) | 3.3 in | |
| October | 58°F (14°C) | 3.4 in | |
| November | 45°F (7°C) | 3.8 in | |
| December | 35°F (2°C) | 2.8 in |
Hartford has a seasonal temperature swing of 48°F / from 30°F in January to 78°F in July. Total annual precipitation is 45.9 inches, with May being the wettest month (5.5") and February the driest (2.3").