Oacoma, SD

Full City Profile · South Dakota · Brule County County

3.9 /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
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.9 / 5.0
$70,250 median income, 5.2% unemployment
A+
Affordability
5.0 / 5.0
$165,800 home value, $847/mo rent
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. Annual precipitation totals 20.4 inches. The area receives 43.3 inches of snow annually.

Temperature

21°F Jan (-6°C) 75°F Jul (24°C)
Annual Average48.2°F
11% below US avg
January Average21°F (-6°C)
July Average75°F (24°C)

Geography

Elevation1,376 ft (419 m)
Area2.6 sq mi (6.8 km²)
Population Density192/sq mi
Coordinates43.8045°N, 99.3661°W
TimezoneAmerica/Chicago
CountyBrule County County
Nearest AirportPierre Regional (PIR)
61 miles away

Precipitation & Snow

Annual Rainfall 20.4"
46% below US avg
Snowfall 43.3"
Wettest Month (Jun) 3.57"
Driest Month (Jan) 0.40"

Air Quality

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score58.7 / 100
Social Vulnerability49.5 / 100
Community Resilience91.4 / 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)

Earthquake History

19 earthquakes (M2.5+) within 150 km since 1990. Strongest: M4.3. Most recent: M2.5 on Apr 27, 2025.

Nov 3, 2002 16 km SSW of Butte, Nebraska M4.3 121 km
May 30, 2024 38 km NNW of Pierre, South Dakota M3.7 136 km
Jun 4, 2021 10 km NE of Anoka, Nebraska M3.7 102 km
Oct 25, 1990 8 km N of Plankinton, South Dakota M3.6 72 km
Jun 18, 2015 15 km SSE of Valentine, Nebraska M3.3 148 km
Aug 9, 2011 2 km S of Fort Pierre, South Dakota M3.3 100 km
Jan 25, 1994 8 km E of Wood Lake, Nebraska M3.3 145 km
Aug 5, 2022 4 km ENE of Draper, South Dakota M3.2 91 km
Jan 4, 2021 5 km N of Tyndall, South Dakota M3.1 148 km
Jul 12, 1998 7 km E of Corn Creek, South Dakota M3.1 143 km
Jul 26, 2002 0 km WSW of Huron, South Dakota M3.1 111 km
Jun 4, 2021 9 km ENE of Anoka, Nebraska M3.1 104 km
Feb 7, 2014 11 km NE of Bijou Hills, South Dakota M3.0 33 km
Aug 15, 2017 8 km E of Agar, South Dakota M3.0 125 km
Feb 1, 2006 6 km ENE of Bassett, Nebraska M2.9 133 km
Jul 3, 1995 9 km SSW of Fort Thompson, South Dakota M2.8 24 km
Mar 20, 2010 9 km NNW of Springview, Nebraska M2.7 107 km
Apr 27, 2025 9 km NE of Burke, South Dakota M2.5 63 km
Jan 16, 2022 9 km NE of Plankinton, South Dakota M2.5 78 km
Source: USGS (M2.5+, 1990-2025)

Tornado History

294 tornadoes (EF0+) within 100 km since 1950. Strongest: EF5. Total: 46 injuries.

Date Rating Distance Fatalities
May 8, 1965 EF5 94 km 0
Jun 18, 2014 EF4 81 km 0
May 5, 2007 EF3 77 km 0
Aug 24, 2006 EF3 84 km 0
Jun 24, 2003 EF3 86 km 0
Jun 16, 1992 EF3 28 km 0
Jul 23, 1973 EF3 99 km 0
Jul 24, 1971 EF3 5 km 0
Jul 9, 1971 EF3 36 km 0
Jul 9, 1971 EF3 22 km 0
Jul 3, 1971 EF3 53 km 0
May 8, 1965 EF3 71 km 0
May 16, 1962 EF3 88 km 0
May 15, 1962 EF3 67 km 0
May 14, 1962 EF3 91 km 0
Jun 18, 2014 EF2 54 km 0
Jun 18, 2014 EF2 70 km 0
Jun 18, 2014 EF2 46 km 0
May 22, 2010 EF2 62 km 0
Aug 24, 2006 EF2 83 km 0
Source: NOAA SPC (EF0+, 1950-2024)

Wildfire History

12 wildfires (100+ acres) within 100 km. Largest: OKREEK (11,115 ac, 2011).

Year Name Acres Distance
2011 OKREEK 11,115 79 km
2006 THOMPSON COMPLEX 3,230 73 km
2000 CLOVER 3,062 57 km
2022 HOLIDAY 2,936 38 km
2000 GANN VALLEY 2,534 56 km
2000 NOVOTNY AND WAGNER 1,968 76 km
2006 FT PIERRE COMPLEX 1,812 84 km
2011 HIGHWAY 47 1,800 25 km
2005 CHAOS 1,539 34 km
2014 OKREEK 1,273 71 km
2000 BAD HORSE 1,215 45 km
2023 SDLDR-HFR-FY23-RX-BROKEN ARROW UNITS B-C-D-E-G-H-I 1,185 64 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 21°F (-6°C) 0.4 in Coldest, Driest
February 25°F (-4°C) 0.6 in
March 36°F (2°C) 1.1 in
April 47°F (8°C) 2.3 in
May 58°F (15°C) 3.2 in
June 69°F (21°C) 3.6 in Wettest
July 75°F (24°C) 2.2 in Warmest
August 74°F (23°C) 2.3 in
September 64°F (18°C) 2.1 in
October 50°F (10°C) 1.6 in
November 36°F (2°C) 0.5 in
December 24°F (-4°C) 0.5 in

Oacoma has a seasonal temperature swing of 55°F / from 21°F in January to 75°F in July. Total annual precipitation is 20.4 inches, with June being the wettest month (3.6") and January the driest (0.4").

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