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Oacoma, SD
Full City Profile · South Dakota · Brule County County
3.2
/5.0
B
Good
505
Population
192/sq mi density
$70,250
Median Income
$38,371 per capita
$165,800
Home Value
$240,737 Zillow
$847
Median Rent
17.9% income on rent
48°F
Avg Temperature
291 sunny days/yr
855
Violent Crime/100K
4,599 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.2 / 5.0
$70,250 median income, 3.2% unemployment
A+
Affordability
5.0 / 5.0
$165,800 home value, $847/mo rent
F
Safety
1.0 / 5.0
855 violent crimes/100K (125% above avg)
C+
Education
2.7 / 5.0
21.3% bachelor's degree or higher
Oacoma experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 21°F in January while summers reach 75°F in July. The area gets 291 sunny days per year. Annual precipitation totals 20.4 inches. Air quality is rated Good with a median AQI of 35.
Temperature
21°F Jan (-6°C)
75°F Jul (24°C)
| Annual Average | 48.2°F |
| 11% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 291 days/yr |
Geography
| Elevation | 1,376 ft (419 m) |
| Area | 2.6 sq mi (6.8 km²) |
| Population Density | 192/sq mi |
| Coordinates | 43.8045°N, 99.3661°W |
| Timezone | America/Chicago |
| County | Brule County County |
| Nearest Airport | Pierre Regional (PIR) 61 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 58.7 / 100 |
| Social Vulnerability | 49.5 / 100 |
| Community Resilience | 91.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Very Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 0.4 in | Coldest, Driest |
| February | 24°F (-4°C) | 0.5 in | |
| March | 34°F (1°C) | 1.3 in | |
| April | 47°F (8°C) | 2.3 in | |
| May | 59°F (15°C) | 3.2 in | Wettest |
| June | 68°F (20°C) | 3.2 in | |
| July | 75°F (24°C) | 2.8 in | Warmest |
| August | 73°F (23°C) | 2.1 in | |
| September | 64°F (18°C) | 1.8 in | |
| October | 51°F (10°C) | 1.6 in | |
| November | 34°F (1°C) | 0.7 in | |
| December | 23°F (-5°C) | 0.4 in |
Oacoma has a seasonal temperature swing of 55°F / from 21°F in January to 75°F in July. Total annual precipitation is 20.1 inches, with May being the wettest month (3.2") and January the driest (0.4").