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Rock Island, IL
Full City Profile · Illinois · Rock Island County County
3.1
/5.0
B
Good
36,758
Population
2,097/sq mi density
$57,292
Median Income
$32,507 per capita
$118,400
Home Value
$122,020 Zillow
$819
Median Rent
31.5% income on rent
51°F
Avg Temperature
275 sunny days/yr
371
Violent Crime/100K
2,340 property/100K
B
Overall
3.1 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.5 / 5.0
$57,292 median income, 3.9% unemployment
A+
Affordability
5.0 / 5.0
$118,400 home value, $819/mo rent
F
Safety
1.0 / 5.0
371 violent crimes/100K
C+
Education
2.8 / 5.0
22.4% bachelor's degree or higher
Rock Island experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 23°F in January while summers reach 76°F in July. The area gets 275 sunny days per year. Annual precipitation totals 38.3 inches. The area receives 36.1 inches of snow annually. Air quality is rated Good with a median AQI of 44.
Temperature
23°F Jan (-5°C)
76°F Jul (24°C)
| Annual Average | 51.2°F |
| 5% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 610 ft (186 m) |
| Area | 17.1 sq mi (44.2 km²) |
| Population Density | 2,097/sq mi |
| Coordinates | 41.4702°N, 90.5831°W |
| Timezone | America/Chicago |
| County | Rock Island County County |
| Nearest Airport | Quad Cities International (MLI) 4 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
| Good Days % | 75.7% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0483 ppm |
| PM2.5 (Fine Particles) | 9.1 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 84.1 / 100 |
| Social Vulnerability | 60.2 / 100 |
| Community Resilience | 87.3 / 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 Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 1.4 in | Coldest |
| February | 27°F (-3°C) | 1.1 in | Driest |
| March | 38°F (3°C) | 2.6 in | |
| April | 50°F (10°C) | 3.7 in | |
| May | 61°F (16°C) | 3.9 in | |
| June | 71°F (22°C) | 4.3 in | |
| July | 76°F (24°C) | 4.6 in | Warmest, Wettest |
| August | 73°F (23°C) | 4.0 in | |
| September | 65°F (18°C) | 3.8 in | |
| October | 53°F (12°C) | 2.7 in | |
| November | 39°F (4°C) | 2.4 in | |
| December | 26°F (-3°C) | 2.0 in |
Rock Island has a seasonal temperature swing of 52°F / from 23°F in January to 76°F in July. Total annual precipitation is 36.5 inches, with July being the wettest month (4.6") and February the driest (1.1").