Erwin, SD

Full City Profile · South Dakota · Kingsbury County County

3.7 /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
44°F Avg Temperature
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.4 / 5.0
$53,750 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$45,000 home value, /mo rent
C+
Education
2.8 / 5.0
22.0% bachelor's degree or higher
Erwin has a cool climate with an average annual temperature of 44°F (7°C). Winters average 14°F in January while summers reach 71°F in July. Annual precipitation totals 26.5 inches. The area receives 47.7 inches of snow annually.

Temperature

14°F Jan (-10°C) 71°F Jul (22°C)
Annual Average44.0°F
19% below US avg
January Average14°F (-10°C)
July Average71°F (22°C)

Geography

Elevation1,861 ft (567 m)
Area0.5 sq mi (1.2 km²)
Population Density104/sq mi
Coordinates44.4880°N, 97.4409°W
TimezoneAmerica/Chicago
CountyKingsbury County County
Nearest AirportWatertown Regional (ATY)
33 miles away

Precipitation & Snow

Annual Rainfall 26.5"
30% below US avg
Snowfall 47.7"
Wettest Month (Jun) 4.42"
Driest Month (Feb) 0.67"

Air Quality

Natural Hazard Risk

Overall RiskVery Low
Risk Score7.9 / 100
Social Vulnerability10.6 / 100
Community Resilience89.1 / 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 14°F (-10°C) 0.7 in Coldest
February 19°F (-7°C) 0.7 in Driest
March 31°F (-1°C) 1.2 in
April 44°F (7°C) 2.4 in
May 56°F (13°C) 3.3 in
June 67°F (19°C) 4.4 in Wettest
July 71°F (22°C) 3.5 in Warmest
August 69°F (21°C) 3.3 in
September 61°F (16°C) 3.0 in
October 46°F (8°C) 2.4 in
November 31°F (-0°C) 0.9 in
December 19°F (-7°C) 0.8 in

Erwin has a seasonal temperature swing of 57°F / from 14°F in January to 71°F in July. Total annual precipitation is 26.5 inches, with June being the wettest month (4.4") and February the driest (0.7").

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