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Marietta, IN
Full City Profile · Indiana · Shelby County County
3.2
/5.0
B
Good
137
Population
361/sq mi density
$113,295
Median Income
$29,165 per capita
$117,500
Home Value
$247,839 Zillow
54°F
Avg Temperature
293 sunny days/yr
286
Violent Crime/100K
9,498 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$113,295 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$117,500 home value, /mo rent
F
Safety
1.0 / 5.0
286 violent crimes/100K
D
Education
1.9 / 5.0
11.5% bachelor's degree or higher
Marietta experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 30°F in January while summers reach 76°F in July. The area gets 293 sunny days per year. Annual precipitation totals 47.3 inches. The area receives 16.3 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
30°F Jan (-1°C)
76°F Jul (24°C)
| Annual Average | 54.1°F |
| 0% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 724 ft (221 m) |
| Area | 0.4 sq mi (1.0 km²) |
| Population Density | 361/sq mi |
| Coordinates | 39.4406°N, 85.8811°W |
| Timezone | America/Indiana/Indianapolis |
| County | Shelby County County |
| Nearest Airport | Indianapolis International (IND) 29 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0458 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 43.4 / 100 |
| Social Vulnerability | 19.7 / 100 |
| Community Resilience | 78.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 2.4 in | Coldest, Driest |
| February | 31°F (-1°C) | 2.4 in | |
| March | 41°F (5°C) | 3.6 in | |
| April | 52°F (11°C) | 4.1 in | |
| May | 62°F (17°C) | 4.5 in | Wettest |
| June | 71°F (22°C) | 3.4 in | |
| July | 76°F (24°C) | 4.3 in | Warmest |
| August | 73°F (23°C) | 3.8 in | |
| September | 66°F (19°C) | 3.0 in | |
| October | 55°F (13°C) | 2.8 in | |
| November | 43°F (6°C) | 3.7 in | |
| December | 33°F (0°C) | 3.1 in |
Marietta has a seasonal temperature swing of 46°F / from 30°F in January to 76°F in July. Total annual precipitation is 41.1 inches, with May being the wettest month (4.5") and January the driest (2.4").