Rock Valley, IA
Full City Profile · Iowa · Sioux County County
3.6
/5.0
B+
Good
4,061
Population
911/sq mi density
$67,012
Median Income
$33,152 per capita
$225,800
Home Value
$309,620 Zillow
$1,070
Median Rent
20.9% income on rent
48°F
Avg Temperature
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.3 / 5.0
$67,012 median income, 0.4% unemployment
A+
Affordability
4.8 / 5.0
$225,800 home value, $1,070/mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
C+
Education
2.7 / 5.0
21.4% bachelor's degree or higher
Rock Valley experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 18°F in January while summers reach 73°F in July. Annual precipitation totals 29.5 inches. The area receives 34.3 inches of snow annually.
Temperature
18°F Jan (-8°C)
73°F Jul (23°C)
| Annual Average | 48.0°F |
| 11% below US avg | |
| January Average | 18°F (-8°C) |
| July Average | 73°F (23°C) |
Geography
| Elevation | 1,257 ft (383 m) |
| Area | 3.3 sq mi (8.5 km²) |
| Population Density | 911/sq mi |
| Coordinates | 43.2026°N, 96.2890°W |
| Timezone | America/Chicago |
| County | Sioux County County |
| Nearest Airport | Joe Foss Field (FSD) 35 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 52.4 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 95.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively High |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 18°F (-8°C) | 0.5 in | Coldest, Driest |
| February | 23°F (-5°C) | 0.8 in | |
| March | 36°F (2°C) | 1.5 in | |
| April | 49°F (9°C) | 3.0 in | |
| May | 61°F (16°C) | 4.1 in | |
| June | 71°F (22°C) | 4.6 in | Wettest |
| July | 73°F (23°C) | 3.4 in | Warmest |
| August | 71°F (22°C) | 3.5 in | |
| September | 64°F (18°C) | 3.4 in | |
| October | 51°F (11°C) | 2.5 in | |
| November | 36°F (2°C) | 1.3 in | |
| December | 23°F (-5°C) | 0.9 in |
Rock Valley has a seasonal temperature swing of 55°F / from 18°F in January to 73°F in July. Total annual precipitation is 29.5 inches, with June being the wettest month (4.6") and January the driest (0.5").