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River Grove, IL
Full City Profile · Illinois · Cook County County
3.3
/5.0
B
Good
10,482
Population
4,386/sq mi density
$74,793
Median Income
$34,944 per capita
$244,700
Home Value
$294,849 Zillow
$1,230
Median Rent
25.6% income on rent
51°F
Avg Temperature
275 sunny days/yr
322
Violent Crime/100K
1,599 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.4 / 5.0
$74,793 median income, 2.7% unemployment
A+
Affordability
4.8 / 5.0
$244,700 home value, $1,230/mo rent
F
Safety
1.0 / 5.0
322 violent crimes/100K
B
Education
3.1 / 5.0
25.8% bachelor's degree or higher
River Grove experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 25°F in January while summers reach 75°F in July. The area gets 275 sunny days per year. Annual precipitation totals 37.9 inches. The area receives 38.4 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
25°F Jan (-4°C)
75°F Jul (24°C)
| Annual Average | 51.3°F |
| 5% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 629 ft (192 m) |
| Area | 0.9 sq mi (2.4 km²) |
| Population Density | 4,386/sq mi |
| Coordinates | 41.9243°N, 87.8379°W |
| Timezone | America/Chicago |
| County | Cook County County |
| Nearest Airport | Chicago O'Hare International (ORD) 5 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0460 ppm |
| NO₂ (Nitrogen Dioxide) | 20.6 ppb |
| SO₂ (Sulfur Dioxide) | 1.33 ppb |
| CO (Carbon Monoxide) | 0.29 ppm |
| PM2.5 (Fine Particles) | 10.1 μg/m³ |
Natural Hazard Risk
| Overall Risk | Very High |
| Risk Score | 100.0 / 100 |
| Social Vulnerability | 61.7 / 100 |
| Community Resilience | 73.3 / 100 |
Hazard Breakdown
| Tornado | Very High |
| Hurricane | Very Low |
| Earthquake | Relatively High |
| Wildfire | Very Low |
| Flood | Very High |
| Hail | Relatively High |
| Strong Wind | Very High |
| Heat Wave | Very High |
| Winter Weather | Very High |
| Lightning | Very High |
| Ice Storm | Very High |
| Drought | Very Low |
| Cold Wave | Very High |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.0 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1954 | MICHIGAN CITY, IN (LAKE MICHIGAN) | Avalanche | 3.0 m | 7 | 83 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 1.7 in | Coldest |
| February | 27°F (-3°C) | 1.5 in | Driest |
| March | 38°F (3°C) | 2.6 in | |
| April | 49°F (9°C) | 3.7 in | |
| May | 60°F (16°C) | 3.6 in | |
| June | 70°F (21°C) | 3.9 in | |
| July | 75°F (24°C) | 3.7 in | Warmest |
| August | 73°F (23°C) | 4.2 in | Wettest |
| September | 65°F (18°C) | 3.5 in | |
| October | 53°F (12°C) | 2.7 in | |
| November | 40°F (4°C) | 3.0 in | |
| December | 28°F (-2°C) | 2.4 in |
River Grove has a seasonal temperature swing of 50°F / from 25°F in January to 75°F in July. Total annual precipitation is 36.7 inches, with August being the wettest month (4.2") and February the driest (1.5").