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Glendale Heights, IL
Full City Profile · Illinois · DuPage County County
3.4
/5.0
B
Good
32,864
Population
6,097/sq mi density
$82,232
Median Income
$36,459 per capita
$249,000
Home Value
$311,718 Zillow
$1,562
Median Rent
27.6% income on rent
49°F
Avg Temperature
275 sunny days/yr
83
Violent Crime/100K
1,101 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.3 / 5.0
$82,232 median income, 3.7% unemployment
A+
Affordability
5.0 / 5.0
$249,000 home value, $1,562/mo rent
F
Safety
1.0 / 5.0
83 violent crimes/100K
B
Education
3.4 / 5.0
30.1% bachelor's degree or higher
Glendale Heights 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. The area gets 275 sunny days per year. Annual precipitation totals 40.2 inches. 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) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 801 ft (244 m) |
| Area | 5.5 sq mi (14.3 km²) |
| Population Density | 6,097/sq mi |
| Coordinates | 41.9189°N, 88.0781°W |
| Timezone | America/Chicago |
| County | DuPage County County |
| Nearest Airport | Chicago O'Hare International (ORD) 10 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
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 | 102 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 1.6 in | Coldest |
| February | 27°F (-3°C) | 1.4 in | Driest |
| March | 38°F (3°C) | 2.6 in | |
| April | 48°F (9°C) | 3.7 in | |
| May | 60°F (15°C) | 3.6 in | |
| June | 69°F (21°C) | 4.1 in | |
| July | 73°F (23°C) | 3.8 in | Warmest |
| August | 72°F (22°C) | 4.2 in | Wettest |
| September | 64°F (18°C) | 3.7 in | |
| October | 53°F (11°C) | 2.6 in | |
| November | 39°F (4°C) | 3.0 in | |
| December | 27°F (-3°C) | 2.3 in |
Glendale Heights has a seasonal temperature swing of 50°F / from 23°F in January to 73°F in July. Total annual precipitation is 36.6 inches, with August being the wettest month (4.2") and February the driest (1.4").