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Big Rock, IA
Full City Profile · Iowa · Scott County County
1.7
/5.0
D
Poor
12
Population
36/sq mi density
49°F
Avg Temperature
275 sunny days/yr
123
Violent Crime/100K
308 property/100K
D
Overall
1.7 / 5.0
Below average overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
123 violent crimes/100K
C
Education
2.3 / 5.0
16.7% bachelor's degree or higher
Big Rock experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 20°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 39.6 inches. The area receives 39.8 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
20°F Jan (-7°C)
74°F Jul (23°C)
| Annual Average | 49.0°F |
| 9% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 676 ft (206 m) |
| Area | 0.3 sq mi (0.9 km²) |
| Population Density | 36/sq mi |
| Coordinates | 41.7691°N, 90.8265°W |
| Timezone | America/Chicago |
| County | Scott County County |
| Nearest Airport | Quad Cities International (MLI) 28 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0442 ppm |
| SO₂ (Sulfur Dioxide) | 0.32 ppb |
| CO (Carbon Monoxide) | 0.21 ppm |
| PM2.5 (Fine Particles) | 10.4 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 84.9 / 100 |
| Social Vulnerability | 19.2 / 100 |
| Community Resilience | 95.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 1.3 in | Coldest |
| February | 25°F (-4°C) | 1.1 in | Driest |
| March | 37°F (3°C) | 2.4 in | |
| April | 50°F (10°C) | 3.5 in | |
| May | 61°F (16°C) | 3.9 in | |
| June | 70°F (21°C) | 4.4 in | Wettest |
| July | 74°F (23°C) | 4.1 in | Warmest |
| August | 72°F (22°C) | 4.1 in | |
| September | 64°F (18°C) | 4.0 in | |
| October | 52°F (11°C) | 2.7 in | |
| November | 38°F (3°C) | 2.3 in | |
| December | 25°F (-4°C) | 1.9 in |
Big Rock has a seasonal temperature swing of 53°F / from 20°F in January to 74°F in July. Total annual precipitation is 35.5 inches, with June being the wettest month (4.4") and February the driest (1.1").