Erwin, SD

Full City Profile · South Dakota · Kingsbury County County

3.0 /5.0

B Good

50 Population 104/sq mi density

$53,750 Median Income $27,074 per capita

$45,000 Home Value $248,681 Zillow

45°F Avg Temperature 276 sunny days/yr

262 Violent Crime/100K 2,215 property/100K

Overall

3.0 / 5.0

Good overall score based on economy, affordability, safety and education

Economy

3.4 / 5.0

$53,750 median income, 0.0% unemployment

A+

Affordability

5.0 / 5.0

$45,000 home value, /mo rent

Safety

1.0 / 5.0

262 violent crimes/100K

C+

Education

2.8 / 5.0

22.0% bachelor's degree or higher

Erwin has a cool climate with an average annual temperature of 45°F (7°C). Winters average 15°F in January while summers reach 72°F in July. The area gets 276 sunny days per year. Annual precipitation totals 26.2 inches. Air quality is rated Good with a median AQI of 35.

Temperature

15°F Jan (-10°C) 72°F Jul (22°C)

Annual Average	44.7°F
	17% below US avg
January Average	15°F (-10°C)
July Average	72°F (22°C)
Sunny Days	276 days/yr

Geography

Elevation	1,861 ft (567 m)
Area	0.5 sq mi (1.2 km²)
Population Density	104/sq mi
Coordinates	44.4880°N, 97.4409°W
Timezone	America/Chicago
County	Kingsbury County County
Nearest Airport	Watertown Regional (ATY) 33 miles away

Precipitation & Snow

Annual Rainfall 26.2"

31% below US avg

Wettest Month (Jun) 3.94"

Driest Month (Jan) 0.55"

Air Quality

AQI Median	35.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	7.9 / 100
Social Vulnerability	10.6 / 100
Community Resilience	89.1 / 100

Hazard Breakdown

Tornado	Relatively Low
Earthquake	Very Low
Wildfire	Very Low
Flood	Very Low
Hail	Relatively Low
Strong Wind	Relatively Low
Heat Wave	Very Low
Winter Weather	Relatively Low
Lightning	Very Low
Ice Storm	Relatively Moderate
Drought	Relatively Low
Cold Wave	Relatively Low
Landslide	Very Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

3 earthquakes (M2.5+) within 150 km since 1990. Strongest: M3.6. Most recent: M2.5 on Jan 16, 2022.

Oct 25, 1990	8 km N of Plankinton, South Dakota	M3.6	113 km
Jul 26, 2002	0 km WSW of Huron, South Dakota	M3.1	63 km
Jan 16, 2022	9 km NE of Plankinton, South Dakota	M2.5	111 km

Source: USGS (M2.5+, 1990–2025)

Tornado History

464 tornadoes (EF0+) within 100 km since 1950. Strongest: EF4. Total: 7 fatalities, 239 injuries.

Date	Rating	Distance	Fatalities
Jun 18, 2014	EF4	92 km	0
Jun 24, 2003	EF4	35 km	0
May 30, 1998	EF4	84 km	6
Jun 7, 1993	EF4	95 km	0
Jun 7, 1993	EF4	69 km	0
Jul 7, 1955	EF4	98 km	1
May 30, 2022	EF3	60 km	0
Jun 24, 2003	EF3	49 km	0
Jun 24, 2003	EF3	89 km	0
Jun 7, 1993	EF3	66 km	0
Jun 7, 1993	EF3	77 km	0
Jun 7, 1993	EF3	95 km	0
Jun 7, 1993	EF3	78 km	0
May 7, 1993	EF3	99 km	0
Jun 16, 1992	EF3	26 km	0
Jun 16, 1992	EF3	46 km	0
May 12, 1984	EF3	49 km	0
Jul 18, 1983	EF3	51 km	0
Jun 15, 1970	EF3	54 km	0
Jun 20, 1968	EF3	100 km	0

Source: NOAA SPC (EF0+, 1950–2024)

Wildfire History

2 wildfires (100+ acres) within 100 km. Largest: PHEASANT OPENER (1,206 ac, 2000).

Year	Name	Acres	Distance
2000	PHEASANT OPENER	1,206	99 km
2009	TAHOHPI WUI RX	1,166	77 km

Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	15°F (-10°C)	0.6 in	Coldest, Driest
February	19°F (-7°C)	0.7 in
March	31°F (-1°C)	1.6 in
April	45°F (7°C)	2.3 in
May	58°F (14°C)	3.1 in
June	67°F (20°C)	3.9 in	Wettest
July	72°F (22°C)	3.2 in	Warmest
August	70°F (21°C)	2.6 in
September	60°F (16°C)	2.2 in
October	47°F (8°C)	1.8 in
November	30°F (-1°C)	0.9 in
December	17°F (-8°C)	0.6 in

Erwin has a seasonal temperature swing of 57°F / from 15°F in January to 72°F in July. Total annual precipitation is 23.4 inches, with June being the wettest month (3.9") and January the driest (0.6").

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