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Carol Stream, IL
Full City Profile · Illinois · DuPage County County
3.9
/5.0
B+
Good
39,427
Population
4,309/sq mi density
$105,395
Median Income
$44,595 per capita
$308,700
Home Value
$368,752 Zillow
$1,465
Median Rent
26.8% income on rent
50°F
Avg Temperature
275 sunny days/yr
73
Violent Crime/100K
1,040 property/100K
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$105,395 median income, 2.9% unemployment
A+
Affordability
5.0 / 5.0
$308,700 home value, $1,465/mo rent
F
Safety
1.0 / 5.0
73 violent crimes/100K
A+
Education
4.5 / 5.0
43.8% bachelor's degree or higher
Carol Stream experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 23°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 33.2 inches. Air quality is rated Good with a median AQI of 43.
Temperature
23°F Jan (-5°C)
74°F Jul (23°C)
| Annual Average | 49.7°F |
| 8% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 738 ft (225 m) |
| Area | 9.4 sq mi (24.4 km²) |
| Population Density | 4,309/sq mi |
| Coordinates | 41.9203°N, 88.1332°W |
| Timezone | America/Chicago |
| County | DuPage County County |
| Nearest Airport | Chicago O'Hare International (ORD) 12 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 | 107 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 | 74°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 |
Carol Stream has a seasonal temperature swing of 50°F / from 23°F in January to 74°F in July. Total annual precipitation is 36.6 inches, with August being the wettest month (4.2") and February the driest (1.4").