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Rock Island Arsenal, IL
Full City Profile · Illinois · Rock Island County County
2.2
/5.0
C
Fair
372
Population
237/sq mi density
$53,472
Median Income
$16,543 per capita
$1,408
Median Rent
31.8% income on rent
50°F
Avg Temperature
275 sunny days/yr
363
Violent Crime/100K
3,364 property/100K
C
Overall
2.2 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Economy
2.9 / 5.0
$53,472 median income, 18.6% unemployment
B
Affordability
3.5 / 5.0
F
Safety
1.0 / 5.0
363 violent crimes/100K
D
Education
1.6 / 5.0
7.0% bachelor's degree or higher
Rock Island Arsenal experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 22°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 38.8 inches. Air quality is rated Good with a median AQI of 43.
Temperature
22°F Jan (-5°C)
74°F Jul (24°C)
| Annual Average | 50.3°F |
| 7% below US avg | |
| January Average | 22°F (-5°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 581 ft (177 m) |
| Area | 2.6 sq mi (6.7 km²) |
| Population Density | 237/sq mi |
| Coordinates | 41.5170°N, 90.5397°W |
| Timezone | America/Chicago |
| County | Rock Island County County |
| Nearest Airport | Quad Cities International (MLI) 5 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
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 | 22°F (-5°C) | 1.4 in | Coldest |
| February | 26°F (-3°C) | 1.1 in | Driest |
| March | 38°F (3°C) | 2.5 in | |
| April | 50°F (10°C) | 3.6 in | |
| May | 62°F (17°C) | 3.9 in | |
| June | 71°F (22°C) | 4.3 in | |
| July | 74°F (24°C) | 4.4 in | Warmest, Wettest |
| August | 73°F (23°C) | 4.1 in | |
| September | 65°F (18°C) | 3.9 in | |
| October | 53°F (12°C) | 2.7 in | |
| November | 38°F (4°C) | 2.3 in | |
| December | 26°F (-3°C) | 1.9 in |
Rock Island Arsenal has a seasonal temperature swing of 52°F / from 22°F in January to 74°F in July. Total annual precipitation is 36.0 inches, with July being the wettest month (4.4") and February the driest (1.1").