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Marietta, MN
Full City Profile · Minnesota · Grant County County
3.0
/5.0
B
Good
172
Population
465/sq mi density
$34,167
Median Income
$20,310 per capita
$62,500
Home Value
$155,677 Zillow
44°F
Avg Temperature
276 sunny days/yr
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
C+
Economy
2.5 / 5.0
$34,167 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$62,500 home value, /mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
C
Education
2.1 / 5.0
13.5% bachelor's degree or higher
Marietta has a cool climate with an average annual temperature of 44°F (7°C). Winters average 12°F in January while summers reach 72°F in July. The area gets 276 sunny days per year. Annual precipitation totals 25.6 inches. The area receives 46.9 inches of snow annually. Air quality is rated Good with a median AQI of 36.
Temperature
12°F Jan (-11°C)
72°F Jul (22°C)
| Annual Average | 43.8°F |
| 19% below US avg | |
| January Average | 12°F (-11°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 1,117 ft (340 m) |
| Area | 0.4 sq mi (1.0 km²) |
| Population Density | 465/sq mi |
| Coordinates | 45.0105°N, 96.4189°W |
| Timezone | America/Chicago |
| County | Grant County County |
| Nearest Airport | Watertown Regional (ATY) 37 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 18.9 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 78.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 12°F (-11°C) | 0.6 in | Coldest |
| February | 18°F (-8°C) | 0.6 in | |
| March | 30°F (-1°C) | 1.5 in | |
| April | 45°F (7°C) | 2.3 in | |
| May | 59°F (15°C) | 2.8 in | |
| June | 68°F (20°C) | 3.7 in | Wettest |
| July | 72°F (22°C) | 3.5 in | Warmest |
| August | 70°F (21°C) | 2.8 in | |
| September | 60°F (16°C) | 2.2 in | |
| October | 48°F (9°C) | 2.1 in | |
| November | 31°F (-1°C) | 1.2 in | |
| December | 17°F (-8°C) | 0.5 in | Driest |
Marietta has a seasonal temperature swing of 60°F / from 12°F in January to 72°F in July. Total annual precipitation is 23.6 inches, with June being the wettest month (3.7") and December the driest (0.5").