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Mount Vernon, SD
Full City Profile · South Dakota · Davison County County
3.2
/5.0
B
Good
437
Population
1,285/sq mi density
$58,542
Median Income
$31,970 per capita
$163,100
Home Value
$278,447 Zillow
$382
Median Rent
17.6% income on rent
48°F
Avg Temperature
291 sunny days/yr
436
Violent Crime/100K
3,699 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.2 / 5.0
$58,542 median income, 0.3% unemployment
A+
Affordability
5.0 / 5.0
$163,100 home value, $382/mo rent
F
Safety
1.0 / 5.0
436 violent crimes/100K (15% above avg)
C+
Education
2.6 / 5.0
19.7% bachelor's degree or higher
Mount Vernon experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 18°F in January while summers reach 76°F in July. The area gets 291 sunny days per year. Annual precipitation totals 25.8 inches. The area receives 40.6 inches of snow annually. Air quality is rated Good with a median AQI of 35.
Temperature
18°F Jan (-8°C)
76°F Jul (25°C)
| Annual Average | 47.9°F |
| 11% below US avg | |
| January Average | 18°F (-8°C) |
| July Average | 76°F (25°C) |
| Sunny Days | 291 days/yr |
Geography
| Elevation | 1,406 ft (429 m) |
| Area | 0.4 sq mi (0.9 km²) |
| Population Density | 1,285/sq mi |
| Coordinates | 43.7127°N, 98.2612°W |
| Timezone | America/Chicago |
| County | Davison County County |
| Nearest Airport | Mitchell Municipal (MHE) 12 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 39.3 / 100 |
| Social Vulnerability | 29.1 / 100 |
| Community Resilience | 81.7 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 18°F (-8°C) | 0.4 in | Coldest, Driest |
| February | 23°F (-5°C) | 0.6 in | |
| March | 34°F (1°C) | 1.6 in | |
| April | 48°F (9°C) | 2.5 in | |
| May | 60°F (15°C) | 3.3 in | |
| June | 70°F (21°C) | 3.5 in | Wettest |
| July | 76°F (25°C) | 2.8 in | Warmest |
| August | 73°F (23°C) | 2.2 in | |
| September | 63°F (17°C) | 2.1 in | |
| October | 50°F (10°C) | 1.6 in | |
| November | 33°F (1°C) | 1.0 in | |
| December | 21°F (-6°C) | 0.5 in |
Mount Vernon has a seasonal temperature swing of 58°F / from 18°F in January to 76°F in July. Total annual precipitation is 22.1 inches, with June being the wettest month (3.5") and January the driest (0.4").