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Castana, IA
Full City Profile · Iowa · Monona County County
2.8
/5.0
C+
Fair
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
260 sunny days/yr
411
Violent Crime/100K
1,984 property/100K
C+
Overall
2.8 / 5.0
Fair overall score based on economy, affordability, safety and education
A
Economy
4.1 / 5.0
$55,833 median income, 2.1% unemployment
A+
Affordability
5.0 / 5.0
$67,500 home value, $725/mo rent
F
Safety
1.0 / 5.0
411 violent crimes/100K (8% above avg)
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. The area gets 260 sunny days per year. Annual precipitation totals 32.1 inches. The area receives 28.6 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 | 48.2°F |
| 11% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 260 days/yr |
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
| AQI Median | 43.0 |
| Rating | Good |
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 | 26°F (-3°C) | 0.7 in | |
| March | 37°F (3°C) | 2.1 in | |
| April | 50°F (10°C) | 2.7 in | |
| May | 62°F (16°C) | 4.1 in | |
| June | 71°F (22°C) | 4.3 in | Wettest |
| July | 74°F (23°C) | 3.5 in | Warmest |
| August | 73°F (23°C) | 3.4 in | |
| September | 64°F (18°C) | 3.2 in | |
| October | 52°F (11°C) | 2.3 in | |
| November | 36°F (2°C) | 1.2 in | |
| December | 24°F (-5°C) | 0.9 in |
Castana has a seasonal temperature swing of 54°F / from 20°F in January to 74°F in July. Total annual precipitation is 28.9 inches, with June being the wettest month (4.3") and January the driest (0.6").