Castana, IA
Full City Profile · Iowa · Monona County County
3.4
/5.0
B
Good
157
Population
173/sq mi density
$55,833
Median Income
$34,282 per capita
$67,500
Home Value
$168,927 Zillow
$725
Median Rent
32.5% income on rent
48°F
Avg Temperature
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.0 / 5.0
$55,833 median income, 2.6% unemployment
A+
Affordability
5.0 / 5.0
$67,500 home value, $725/mo rent
F
Education
1.2 / 5.0
3.0% bachelor's degree or higher
Castana experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 20°F in January while summers reach 74°F in July. Annual precipitation totals 32.1 inches. The area receives 28.6 inches of snow annually.
Temperature
20°F Jan (-7°C)
74°F Jul (23°C)
| Annual Average | 48.2°F |
| 11% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 74°F (23°C) |
Geography
| Elevation | 1,131 ft (345 m) |
| Area | 0.9 sq mi (2.4 km²) |
| Population Density | 173/sq mi |
| Coordinates | 42.0734°N, 95.9104°W |
| Timezone | America/Chicago |
| County | Monona County County |
| Nearest Airport | Sioux Gateway/Brig General Bud Day Field (SUX) 33 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 25.1 / 100 |
| Social Vulnerability | 36.8 / 100 |
| Community Resilience | 82.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | No Rating |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 0.6 in | Coldest, Driest |
| February | 24°F (-5°C) | 0.7 in | |
| March | 36°F (2°C) | 1.7 in | |
| April | 48°F (9°C) | 3.3 in | |
| May | 60°F (16°C) | 4.7 in | |
| June | 70°F (21°C) | 4.8 in | Wettest |
| July | 74°F (23°C) | 4.0 in | Warmest |
| August | 71°F (22°C) | 4.2 in | |
| September | 64°F (18°C) | 3.1 in | |
| October | 51°F (11°C) | 2.4 in | |
| November | 36°F (2°C) | 1.5 in | |
| December | 25°F (-4°C) | 1.0 in |
Castana has a seasonal temperature swing of 54°F / from 20°F in January to 74°F in July. Total annual precipitation is 32.1 inches, with June being the wettest month (4.8") and January the driest (0.6").