Bonnie Brae, IL
Full City Profile · Illinois · DuPage County County
3.9
/5.0
B+
Good
844
Population
4,442/sq mi density
$76,483
Median Income
$37,005 per capita
$224,200
Home Value
$357,327 Zillow
$1,570
Median Rent
24.4% income on rent
51°F
Avg Temperature
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.8 / 5.0
$76,483 median income, 6.7% unemployment
A+
Affordability
5.0 / 5.0
$224,200 home value, $1,570/mo rent
C+
Education
2.8 / 5.0
22.2% bachelor's degree or higher
Bonnie Brae experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 24°F in January while summers reach 75°F in July. Annual precipitation totals 41.1 inches. The area receives 33.2 inches of snow annually. Air quality is rated Good with a median AQI of 45.
Temperature
24°F Jan (-5°C)
75°F Jul (24°C)
| Annual Average | 50.9°F |
| 6% below US avg | |
| January Average | 24°F (-5°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 661 ft (201 m) |
| Area | 0.2 sq mi (0.5 km²) |
| Population Density | 4,442/sq mi |
| Coordinates | 41.5999°N, 88.0345°W |
| Timezone | America/Chicago |
| County | DuPage County County |
| Nearest Airport | Joliet Regional (JOT) 9 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 45.0 |
| Rating | Good |
| Good Days % | 62.8% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0475 ppm |
| PM2.5 (Fine Particles) | 10.1 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 97.7 / 100 |
| Social Vulnerability | 15.8 / 100 |
| Community Resilience | 71.8 / 100 |
Hazard Breakdown
| Tornado | Very High |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Low |
| Strong Wind | Very High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Very 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 | 96 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-5°C) | 2.2 in | Coldest |
| February | 28°F (-2°C) | 2.0 in | Driest |
| March | 39°F (4°C) | 2.7 in | |
| April | 50°F (10°C) | 4.1 in | |
| May | 61°F (16°C) | 4.8 in | Wettest |
| June | 71°F (22°C) | 4.7 in | |
| July | 75°F (24°C) | 4.5 in | Warmest |
| August | 73°F (23°C) | 4.4 in | |
| September | 66°F (19°C) | 3.3 in | |
| October | 54°F (12°C) | 3.7 in | |
| November | 40°F (5°C) | 2.7 in | |
| December | 29°F (-1°C) | 2.2 in |
Bonnie Brae has a seasonal temperature swing of 51°F / from 24°F in January to 75°F in July. Total annual precipitation is 41.1 inches, with May being the wettest month (4.8") and February the driest (2.0").