Fox River Grove, IL
Full City Profile · Illinois · McHenry County County
4.1
/5.0
A
Great
4,501
Population
2,632/sq mi density
$125,104
Median Income
$50,616 per capita
$289,200
Home Value
$365,349 Zillow
$2,157
Median Rent
33.3% income on rent
48°F
Avg Temperature
A
Overall
4.1 / 5.0
Strong
A
Economy
4.1 / 5.0
$125,104 median income, 8.1% unemployment
A+
Affordability
5.0 / 5.0
$289,200 home value, $2,157/mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
A+
Education
4.6 / 5.0
45.3% bachelor's degree or higher
Fox River Grove experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 21°F in January while summers reach 72°F in July. Annual precipitation totals 40.4 inches. The area receives 38.5 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
21°F Jan (-6°C)
72°F Jul (22°C)
| Annual Average | 48.0°F |
| 11% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 72°F (22°C) |
Geography
| Elevation | 769 ft (234 m) |
| Area | 0.7 sq mi (1.7 km²) |
| Population Density | 2,632/sq mi |
| Coordinates | 42.1955°N, 88.2148°W |
| Timezone | America/Chicago |
| County | McHenry County County |
| Nearest Airport | Chicago O'Hare International (ORD) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
| Good Days % | 66.9% |
| Unhealthy Days | 1 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0484 ppm |
| PM2.5 (Fine Particles) | 9.1 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 90.8 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 84.0 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Very 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 | 123 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 2.1 in | Coldest |
| February | 25°F (-4°C) | 1.9 in | Driest |
| March | 36°F (2°C) | 2.4 in | |
| April | 47°F (9°C) | 4.0 in | |
| May | 58°F (15°C) | 5.2 in | Wettest |
| June | 68°F (20°C) | 4.6 in | |
| July | 72°F (22°C) | 4.0 in | Warmest |
| August | 70°F (21°C) | 4.6 in | |
| September | 63°F (17°C) | 3.7 in | |
| October | 51°F (10°C) | 3.4 in | |
| November | 38°F (3°C) | 2.6 in | |
| December | 27°F (-3°C) | 2.2 in |
Fox River Grove has a seasonal temperature swing of 51°F / from 21°F in January to 72°F in July. Total annual precipitation is 40.4 inches, with May being the wettest month (5.2") and February the driest (1.9").