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Salem, IL
Full City Profile · Illinois · Marion County County
2.9
/5.0
C+
Fair
7,341
Population
1,050/sq mi density
$57,083
Median Income
$31,213 per capita
$99,800
Home Value
$143,214 Zillow
$752
Median Rent
23.9% income on rent
55°F
Avg Temperature
293 sunny days/yr
298
Violent Crime/100K
4,736 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.6 / 5.0
$57,083 median income, 1.6% unemployment
A+
Affordability
5.0 / 5.0
$99,800 home value, $752/mo rent
F
Safety
1.0 / 5.0
298 violent crimes/100K
C
Education
2.2 / 5.0
14.8% bachelor's degree or higher
Salem experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 30°F in January while summers reach 78°F in July. The area gets 293 sunny days per year. Annual precipitation totals 45.9 inches. The area receives 10.2 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
30°F Jan (-1°C)
78°F Jul (25°C)
| Annual Average | 54.9°F |
| 2% above US avg | |
| January Average | 30°F (-1°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 543 ft (166 m) |
| Area | 7.0 sq mi (18.1 km²) |
| Population Density | 1,050/sq mi |
| Coordinates | 38.6275°N, 88.9594°W |
| Timezone | America/Chicago |
| County | Marion County County |
| Nearest Airport | St Louis Regional (ALN) 61 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 77.1 / 100 |
| Social Vulnerability | 68.6 / 100 |
| Community Resilience | 96.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 2.1 in | Coldest, Driest |
| February | 33°F (1°C) | 2.4 in | |
| March | 44°F (7°C) | 4.1 in | |
| April | 55°F (13°C) | 3.9 in | |
| May | 64°F (18°C) | 4.3 in | Wettest |
| June | 73°F (23°C) | 4.0 in | |
| July | 78°F (25°C) | 3.9 in | Warmest |
| August | 75°F (24°C) | 3.0 in | |
| September | 68°F (20°C) | 3.1 in | |
| October | 57°F (14°C) | 3.0 in | |
| November | 45°F (7°C) | 3.8 in | |
| December | 34°F (1°C) | 3.5 in |
Salem has a seasonal temperature swing of 48°F / from 30°F in January to 78°F in July. Total annual precipitation is 41.1 inches, with May being the wettest month (4.3") and January the driest (2.1").