Marley, IL
Full City Profile · Illinois · Will County County
4.3
/5.0
A
Great
111
Population
1,009/sq mi density
51°F
Avg Temperature
A
Overall
4.3 / 5.0
Strong
A
Education
4.3 / 5.0
0.0% bachelor's degree or higher
Marley 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 41.3 inches. The area receives 33.2 inches of snow annually. Air quality is rated Good with a median AQI of 44.
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 | 698 ft (213 m) |
| Area | 0.1 sq mi (0.3 km²) |
| Population Density | 1,009/sq mi |
| Coordinates | 41.5482°N, 87.9260°W |
| Timezone | America/Chicago |
| County | Will County County |
| Nearest Airport | Joliet Regional (JOT) 13 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
| Good Days % | 67.1% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0479 ppm |
| PM2.5 (Fine Particles) | 9.5 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 97.3 / 100 |
| Social Vulnerability | 13.4 / 100 |
| Community Resilience | 92.4 / 100 |
Hazard Breakdown
| Tornado | Very High |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively 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 | 88 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-5°C) | 2.3 in | Coldest |
| February | 28°F (-2°C) | 2.2 in | Driest |
| March | 39°F (4°C) | 2.6 in | |
| April | 50°F (10°C) | 4.0 in | |
| May | 61°F (16°C) | 4.6 in | |
| June | 71°F (22°C) | 4.7 in | Wettest |
| July | 75°F (24°C) | 4.7 in | Warmest |
| August | 73°F (23°C) | 4.2 in | |
| September | 66°F (19°C) | 3.5 in | |
| October | 54°F (12°C) | 3.5 in | |
| November | 40°F (5°C) | 2.7 in | |
| December | 29°F (-1°C) | 2.4 in |
Marley has a seasonal temperature swing of 51°F / from 24°F in January to 75°F in July. Total annual precipitation is 41.3 inches, with June being the wettest month (4.7") and February the driest (2.2").