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 276 sunny days/yr

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. The area gets 276 sunny days per year. Annual precipitation totals 21.4 inches. The area receives 47.0 inches of snow annually. Air quality is rated Good with a median AQI of 35.

Temperature

12°F Jan (-11°C) 71°F Jul (22°C)

Annual Average	42.6°F
	21% below US avg
January Average	12°F (-11°C)
July Average	71°F (22°C)
Sunny Days	276 days/yr

Geography

Elevation	1,860 ft (567 m)
Area	0.0 sq mi (0.0 km²)
Population Density	88/sq mi
Coordinates	45.1912°N, 99.4647°W
Timezone	America/Chicago
County	Faulk County County
Nearest Airport	Aberdeen Regional (ABR) 54 miles away

Precipitation & Snow

Annual Rainfall 21.4"

44% below US avg

Snowfall 47.0"

Wettest Month (Jun) 3.35"

Driest Month (Jan) 0.35"

Air Quality

AQI Median	35.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	8.0 / 100
Social Vulnerability	90.7 / 100
Community Resilience	48.4 / 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	19°F (-8°C)	0.4 in
March	30°F (-1°C)	1.1 in
April	44°F (7°C)	1.9 in
May	57°F (14°C)	2.5 in
June	66°F (19°C)	3.4 in	Wettest
July	71°F (22°C)	2.5 in	Warmest
August	70°F (21°C)	2.2 in
September	60°F (15°C)	1.5 in
October	47°F (8°C)	1.3 in
November	29°F (-2°C)	0.6 in
December	16°F (-9°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 18.0 inches, with June being the wettest month (3.4") and January the driest (0.4").

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