West Union, IL
Full City Profile · Illinois · Clark County County
2.8
/5.0
C+
Fair
164
Population
91/sq mi density
$72,969
Median Income
$37,234 per capita
55°F
Avg Temperature
C+
Overall
2.8 / 5.0
Fair overall score based on economy, affordability, safety and education
A
Economy
4.2 / 5.0
$72,969 median income, 0.0% unemployment
F
Education
1.3 / 5.0
4.2% bachelor's degree or higher
West Union experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 31°F in January while summers reach 76°F in July. Annual precipitation totals 47.2 inches. The area receives 9.8 inches of snow annually. Air quality is rated Good with a median AQI of 36.
Temperature
31°F Jan (-1°C)
76°F Jul (25°C)
| Annual Average | 55.1°F |
| 2% above US avg | |
| January Average | 31°F (-1°C) |
| July Average | 76°F (25°C) |
Geography
| Elevation | 475 ft (145 m) |
| Area | 1.8 sq mi (4.7 km²) |
| Population Density | 91/sq mi |
| Coordinates | 39.2137°N, 87.6666°W |
| Timezone | America/Chicago |
| County | Clark County County |
| Nearest Airport | Terre Haute Regional (HUF) 25 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
| Good Days % | 91.5% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0460 ppm |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 27.3 / 100 |
| Social Vulnerability | 42.7 / 100 |
| Community Resilience | 67.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-1°C) | 3.2 in | Coldest |
| February | 35°F (2°C) | 2.6 in | Driest |
| March | 45°F (7°C) | 3.5 in | |
| April | 56°F (13°C) | 5.1 in | |
| May | 66°F (19°C) | 5.1 in | |
| June | 74°F (23°C) | 5.1 in | Wettest |
| July | 76°F (25°C) | 4.7 in | Warmest |
| August | 75°F (24°C) | 3.7 in | |
| September | 68°F (20°C) | 3.6 in | |
| October | 57°F (14°C) | 3.8 in | |
| November | 44°F (7°C) | 3.7 in | |
| December | 35°F (2°C) | 3.3 in |
West Union has a seasonal temperature swing of 46°F / from 31°F in January to 76°F in July. Total annual precipitation is 47.2 inches, with June being the wettest month (5.1") and February the driest (2.6").