Ridgefield, IL
Full City Profile · Illinois · McHenry County County
5.0
/5.0
A+
Excellent
218
Population
419/sq mi density
$133,454
Median Income
$38,193 per capita
$265,400
Home Value
$367,174 Zillow
49°F
Avg Temperature
A+
Overall
5.0 / 5.0
Strong
A+
Economy
5.0 / 5.0
$133,454 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$265,400 home value, /mo rent
A+
Education
5.0 / 5.0
71.7% bachelor's degree or higher
Ridgefield experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 23°F in January while summers reach 73°F in July. Annual precipitation totals 39.3 inches. The area receives 35.1 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
23°F Jan (-5°C)
73°F Jul (23°C)
| Annual Average | 49.2°F |
| 9% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 73°F (23°C) |
Geography
| Elevation | 936 ft (285 m) |
| Area | 0.5 sq mi (1.3 km²) |
| Population Density | 419/sq mi |
| Coordinates | 42.2707°N, 88.3620°W |
| Timezone | America/Chicago |
| County | McHenry County County |
| Nearest Airport | Chicago O'Hare International (ORD) 31 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 | 138 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 2.0 in | Coldest |
| February | 26°F (-3°C) | 1.8 in | Driest |
| March | 37°F (3°C) | 2.5 in | |
| April | 48°F (9°C) | 3.8 in | |
| May | 60°F (15°C) | 5.0 in | |
| June | 69°F (21°C) | 5.3 in | Wettest |
| July | 73°F (23°C) | 3.9 in | Warmest |
| August | 72°F (22°C) | 3.8 in | |
| September | 63°F (17°C) | 3.5 in | |
| October | 52°F (11°C) | 3.2 in | |
| November | 39°F (4°C) | 2.5 in | |
| December | 28°F (-2°C) | 2.1 in |
Ridgefield has a seasonal temperature swing of 50°F / from 23°F in January to 73°F in July. Total annual precipitation is 39.3 inches, with June being the wettest month (5.3") and February the driest (1.8").