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Alvan (Alvin), IL
Full City Profile · Illinois · Vermilion County County
3.5
/5.0
B+
Good
182
Population
230/sq mi density
$94,167
Median Income
$40,188 per capita
$84,400
Home Value
$165,338 Zillow
52°F
Avg Temperature
275 sunny days/yr
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.1 / 5.0
$94,167 median income, 7.4% unemployment
A+
Affordability
5.0 / 5.0
$84,400 home value, /mo rent
F
Education
1.4 / 5.0
4.8% bachelor's degree or higher
Alvan (Alvin) experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 26°F in January while summers reach 75°F in July. The area gets 275 sunny days per year. Annual precipitation totals 40.9 inches. The area receives 20.3 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
26°F Jan (-3°C)
75°F Jul (24°C)
| Annual Average | 52.3°F |
| 3% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 641 ft (195 m) |
| Area | 0.8 sq mi (2.0 km²) |
| Population Density | 230/sq mi |
| Coordinates | 40.3070°N, 87.6069°W |
| Timezone | America/Chicago |
| County | Vermilion County County |
| Nearest Airport | Vermilion Regional (DNV) 7 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 78.8 / 100 |
| Social Vulnerability | 70.2 / 100 |
| Community Resilience | 87.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 1.8 in | Coldest, Driest |
| February | 28°F (-2°C) | 1.8 in | |
| March | 40°F (4°C) | 3.1 in | |
| April | 51°F (10°C) | 3.9 in | |
| May | 62°F (17°C) | 4.3 in | Wettest |
| June | 71°F (22°C) | 4.3 in | |
| July | 75°F (24°C) | 4.3 in | Warmest |
| August | 72°F (22°C) | 3.9 in | |
| September | 66°F (19°C) | 3.1 in | |
| October | 54°F (12°C) | 3.0 in | |
| November | 42°F (5°C) | 3.3 in | |
| December | 30°F (-1°C) | 2.7 in |
Alvan (Alvin) has a seasonal temperature swing of 49°F / from 26°F in January to 75°F in July. Total annual precipitation is 39.4 inches, with May being the wettest month (4.3") and January the driest (1.8").