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Vienna, IL
Full City Profile · Illinois · Johnson County County
3.1
/5.0
B
Good
2,115
Population
745/sq mi density
$39,471
Median Income
$25,122 per capita
$77,400
Home Value
$177,726 Zillow
$616
Median Rent
29.0% income on rent
57°F
Avg Temperature
299 sunny days/yr
B
Overall
3.1 / 5.0
Good overall score based on economy, affordability, safety and education
C+
Economy
2.7 / 5.0
$39,471 median income, 0.3% unemployment
A+
Affordability
5.0 / 5.0
$77,400 home value, $616/mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
C
Education
2.4 / 5.0
17.1% bachelor's degree or higher
Vienna enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 34°F in January while summers reach 77°F in July. The area gets 299 sunny days per year. Annual precipitation totals 50.5 inches. The area receives 7.2 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
34°F Jan (1°C)
77°F Jul (25°C)
| Annual Average | 57.2°F |
| 6% above US avg | |
| January Average | 34°F (1°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 299 days/yr |
Geography
| Elevation | 363 ft (111 m) |
| Area | 2.9 sq mi (7.4 km²) |
| Population Density | 745/sq mi |
| Coordinates | 37.4136°N, 88.8866°W |
| Timezone | America/Chicago |
| County | Johnson County County |
| Nearest Airport | Barkley Regional (PAH) 25 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 51.1 / 100 |
| Social Vulnerability | 82.0 / 100 |
| Community Resilience | 47.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 34°F (1°C) | 3.2 in | Coldest |
| February | 36°F (2°C) | 3.4 in | |
| March | 47°F (8°C) | 4.8 in | |
| April | 57°F (14°C) | 4.6 in | |
| May | 66°F (19°C) | 4.9 in | Wettest |
| June | 74°F (23°C) | 4.1 in | |
| July | 77°F (25°C) | 3.8 in | Warmest |
| August | 77°F (25°C) | 3.5 in | |
| September | 70°F (21°C) | 3.4 in | |
| October | 58°F (15°C) | 3.1 in | Driest |
| November | 47°F (8°C) | 4.3 in | |
| December | 37°F (3°C) | 4.3 in |
Vienna has a seasonal temperature swing of 43°F / from 34°F in January to 77°F in July. Total annual precipitation is 47.3 inches, with May being the wettest month (4.9") and October the driest (3.1").