Martelle, IA
Full City Profile · Iowa · Linn County County
3.7
/5.0
B+
Good
432
Population
1,394/sq mi density
$95,000
Median Income
$31,599 per capita
$130,000
Home Value
$312,888 Zillow
$720
Median Rent
22.5% income on rent
48°F
Avg Temperature
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$95,000 median income, 10.7% unemployment
A+
Affordability
5.0 / 5.0
$130,000 home value, $720/mo rent
C
Education
2.3 / 5.0
16.0% bachelor's degree or higher
Martelle experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 20°F in January while summers reach 72°F in July. Annual precipitation totals 39.3 inches. The area receives 34.3 inches of snow annually. Air quality is rated Good with a median AQI of 44.
Temperature
20°F Jan (-7°C)
72°F Jul (22°C)
| Annual Average | 48.0°F |
| 11% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 72°F (22°C) |
Geography
| Elevation | 908 ft (277 m) |
| Area | 0.3 sq mi (0.9 km²) |
| Population Density | 1,394/sq mi |
| Coordinates | 42.0204°N, 91.3578°W |
| Timezone | America/Chicago |
| County | Linn County County |
| Nearest Airport | Monticello Regional (MXO) 17 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
| Good Days % | 64.2% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0481 ppm |
| SO₂ (Sulfur Dioxide) | 0.46 ppb |
| PM2.5 (Fine Particles) | 11.3 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 86.7 / 100 |
| Social Vulnerability | 15.4 / 100 |
| Community Resilience | 98.7 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Very High |
| Heat Wave | Relatively Low |
| 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, Driest |
| February | 24°F (-4°C) | 1.5 in | |
| March | 36°F (2°C) | 2.2 in | |
| April | 48°F (9°C) | 4.0 in | |
| May | 59°F (15°C) | 4.7 in | |
| June | 69°F (21°C) | 5.5 in | Wettest |
| July | 72°F (22°C) | 4.5 in | Warmest |
| August | 70°F (21°C) | 4.8 in | |
| September | 63°F (17°C) | 3.7 in | |
| October | 51°F (10°C) | 3.1 in | |
| November | 38°F (3°C) | 2.2 in | |
| December | 26°F (-3°C) | 1.8 in |
Martelle has a seasonal temperature swing of 52°F / from 20°F in January to 72°F in July. Total annual precipitation is 39.3 inches, with June being the wettest month (5.5") and January the driest (1.3").