Onaka, SD

Full City Profile · South Dakota · Faulk County County

5.0 /5.0
A+ Excellent
23 Population 88/sq mi density
43°F Avg Temperature
A+
Overall
5.0 / 5.0
Strong
A+
Education
5.0 / 5.0
50.0% bachelor's degree or higher
Onaka has a cool climate with an average annual temperature of 43°F (6°C). Winters average 12°F in January while summers reach 71°F in July. Annual precipitation totals 20.3 inches. The area receives 35.0 inches of snow annually.

Temperature

12°F Jan (-11°C) 71°F Jul (22°C)
Annual Average42.6°F
21% below US avg
January Average12°F (-11°C)
July Average71°F (22°C)

Geography

Elevation1,860 ft (567 m)
Area0.0 sq mi (0.0 km²)
Population Density88/sq mi
Coordinates45.1912°N, 99.4647°W
TimezoneAmerica/Chicago
CountyFaulk County County
Nearest AirportAberdeen Regional (ABR)
54 miles away

Precipitation & Snow

Annual Rainfall 20.3"
47% below US avg
Snowfall 35.0"
Wettest Month (Jun) 3.55"
Driest Month (Jan) 0.38"

Air Quality

Natural Hazard Risk

Overall RiskVery Low
Risk Score8.0 / 100
Social Vulnerability90.7 / 100
Community Resilience48.4 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Very Low
Wildfire Relatively Low
Flood Very Low
Hail Relatively Low
Strong Wind Very Low
Heat Wave Very Low
Winter Weather Relatively Low
Lightning Very Low
Ice Storm Relatively Low
Drought Relatively Low
Cold Wave Relatively Low
Landslide Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

5 earthquakes (M2.5+) within 150 km since 1990. Strongest: M3.7. Most recent: M3.7 on May 30, 2024.

May 30, 2024 38 km NNW of Pierre, South Dakota M3.7 102 km
Aug 9, 2011 2 km S of Fort Pierre, South Dakota M3.3 120 km
Jul 26, 2002 0 km WSW of Huron, South Dakota M3.1 135 km
Aug 15, 2017 8 km E of Agar, South Dakota M3.0 55 km
Jul 3, 1995 9 km SSW of Fort Thompson, South Dakota M2.8 133 km
Source: USGS (M2.5+, 1990-2025)

Tornado History

304 tornadoes (EF0+) within 100 km since 1950. Strongest: EF4. Total: 6 fatalities, 40 injuries.

Date Rating Distance Fatalities
May 22, 2010 EF4 36 km 0
Jun 23, 2002 EF4 97 km 0
Aug 24, 2006 EF3 56 km 0
Jun 23, 2002 EF3 89 km 0
May 31, 1996 EF3 83 km 0
Jun 7, 1993 EF3 90 km 0
Jul 1, 1973 EF3 76 km 1
Jun 20, 1968 EF3 70 km 0
Jun 20, 1968 EF3 56 km 0
Jul 31, 1966 EF3 90 km 2
Jun 9, 1957 EF3 32 km 0
Aug 28, 2024 EF2 82 km 0
Aug 30, 2020 EF2 66 km 1
Jul 4, 2020 EF2 74 km 0
May 22, 2010 EF2 53 km 0
Aug 24, 2006 EF2 81 km 0
Jul 18, 2001 EF2 17 km 0
Jun 7, 1993 EF2 92 km 0
Jun 7, 1993 EF2 92 km 0
Jun 7, 1993 EF2 92 km 0
Source: NOAA SPC (EF0+, 1950-2024)

Wildfire History

10 wildfires (100+ acres) within 100 km. Largest: LAPLANTE (14,777 ac, 2002).

Year Name Acres Distance
2002 LAPLANTE 14,777 94 km
2022 ROHRBACH 2,887 16 km
2006 1804 2,778 78 km
2011 MOUND CITY 2,755 85 km
2006 FOUR BEAR 2,179 72 km
2003 JOEL BERTSCH 2 1,460 80 km
1991 UNNAMED 1,438 92 km
2004 ALLEN STUECKLE 1,330 76 km
2005 N HYDE 1,204 53 km
2021 FUZZY 1,075 77 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 12°F (-11°C) 0.4 in Coldest, Driest
February 16°F (-9°C) 0.5 in
March 28°F (-2°C) 0.8 in
April 42°F (6°C) 1.6 in
May 55°F (13°C) 2.9 in
June 66°F (19°C) 3.6 in Wettest
July 71°F (22°C) 3.3 in Warmest
August 69°F (20°C) 2.6 in
September 60°F (15°C) 2.2 in
October 45°F (7°C) 1.7 in
November 30°F (-1°C) 0.5 in
December 18°F (-8°C) 0.4 in

Onaka has a seasonal temperature swing of 59°F / from 12°F in January to 71°F in July. Total annual precipitation is 20.3 inches, with June being the wettest month (3.6") and January the driest (0.4").

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