Leland Grove, IL
Full City Profile · Illinois · Sangamon County County
5.0
/5.0
A+
Excellent
1,595
Population
2,532/sq mi density
$126,944
Median Income
$98,633 per capita
$261,500
Home Value
$334,849 Zillow
$1,227
Median Rent
24.7% income on rent
54°F
Avg Temperature
A+
Overall
5.0 / 5.0
Strong
A+
Economy
5.0 / 5.0
$126,944 median income, 1.8% unemployment
A+
Affordability
5.0 / 5.0
$261,500 home value, $1,227/mo rent
A+
Education
5.0 / 5.0
67.1% bachelor's degree or higher
Leland Grove experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 28°F in January while summers reach 77°F in July. Annual precipitation totals 38.0 inches. The area receives 21.8 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
28°F Jan (-2°C)
77°F Jul (25°C)
| Annual Average | 54.0°F |
| 0% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 77°F (25°C) |
Geography
| Elevation | 563 ft (172 m) |
| Area | 0.6 sq mi (1.6 km²) |
| Population Density | 2,532/sq mi |
| Coordinates | 39.7787°N, 89.6839°W |
| Timezone | America/Chicago |
| County | Sangamon County County |
| Nearest Airport | General Downing - Peoria International (PIA) 61 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
| Good Days % | 71.9% |
| Unhealthy Days | 1 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0483 ppm |
| PM2.5 (Fine Particles) | 8.9 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 91.7 / 100 |
| Social Vulnerability | 32.0 / 100 |
| Community Resilience | 92.2 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively High |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 2.0 in | Coldest |
| February | 32°F (0°C) | 1.9 in | Driest |
| March | 43°F (6°C) | 2.8 in | |
| April | 54°F (12°C) | 4.0 in | |
| May | 65°F (18°C) | 4.5 in | |
| June | 74°F (23°C) | 4.6 in | Wettest |
| July | 77°F (25°C) | 3.9 in | Warmest |
| August | 75°F (24°C) | 3.4 in | |
| September | 68°F (20°C) | 2.9 in | |
| October | 56°F (13°C) | 3.3 in | |
| November | 44°F (6°C) | 2.7 in | |
| December | 33°F (0°C) | 2.2 in |
Leland Grove has a seasonal temperature swing of 49°F / from 28°F in January to 77°F in July. Total annual precipitation is 38.0 inches, with June being the wettest month (4.6") and February the driest (1.9").