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Westport, SD

Full City Profile · South Dakota · Brown County County

3.0 /5.0
B Good
93 Population 388/sq mi density
$58,750 Median Income $27,114 per capita
$103,900 Home Value $236,161 Zillow
43°F Avg Temperature 276 sunny days/yr
282 Violent Crime/100K 1,976 property/100K
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.2 / 5.0
$58,750 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$103,900 home value, /mo rent
F
Safety
1.0 / 5.0
282 violent crimes/100K
D
Education
1.7 / 5.0
8.8% bachelor's degree or higher
Westport has a cool climate with an average annual temperature of 43°F (6°C). Winters average 11°F in January while summers reach 72°F in July. The area gets 276 sunny days per year. Annual precipitation totals 22.5 inches. The area receives 37.8 inches of snow annually. Air quality is rated Good with a median AQI of 35.

Temperature

11°F Jan (-12°C) 72°F Jul (22°C)
Annual Average42.8°F
21% below US avg
January Average11°F (-12°C)
July Average72°F (22°C)
Sunny Days276 days/yr

Geography

Elevation1,334 ft (407 m)
Area0.2 sq mi (0.6 km²)
Population Density388/sq mi
Coordinates45.6478°N, 98.4981°W
TimezoneAmerica/Chicago
CountyBrown County County
Nearest AirportAberdeen Regional (ABR)
14 miles away

Precipitation & Snow

Annual Rainfall 22.5"
41% below US avg
Snowfall 37.8"
Wettest Month (Jun) 3.35"
Driest Month (Dec) 0.43"

Air Quality

AQI Median35.0
RatingGood

Air Pollutants (EPA 2023)

PM2.5 (Fine Particles)7.1 μg/m³

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score73.5 / 100
Social Vulnerability24.1 / 100
Community Resilience85.6 / 100

Hazard Breakdown

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

Earthquake History

3 earthquakes (M2.5+) within 150 km since 1990. Strongest: M3.7. Most recent: M3.0 on Aug 15, 2017.

Oct 20, 1995 8 km SSE of New Effington, South Dakota M3.7 128 km
Jul 26, 2002 0 km WSW of Huron, South Dakota M3.1 145 km
Aug 15, 2017 8 km E of Agar, South Dakota M3.0 146 km
Source: USGS (M2.5+, 1990–2025)

Tornado History

356 tornadoes (EF0+) within 100 km since 1950. Strongest: EF4. Total: 6 fatalities, 63 injuries.

Date Rating Distance Fatalities
May 22, 2010 EF4 100 km 0
Jun 23, 2002 EF4 6 km 0
Jul 17, 2011 EF3 94 km 0
Aug 24, 2006 EF3 92 km 0
Jun 23, 2002 EF3 13 km 0
May 31, 1996 EF3 20 km 0
Aug 19, 1974 EF3 96 km 0
May 20, 1974 EF3 98 km 0
Jul 1, 1973 EF3 70 km 0
Jul 1, 1973 EF3 44 km 1
Jun 25, 1969 EF3 39 km 0
Jul 31, 1966 EF3 85 km 2
May 20, 1965 EF3 30 km 0
Jun 21, 1961 EF3 29 km 1
Jun 9, 1957 EF3 85 km 0
Jul 4, 2020 EF2 23 km 0
Jul 10, 2011 EF2 67 km 0
May 22, 2010 EF2 42 km 0
May 22, 2010 EF2 28 km 0
Jun 29, 2005 EF2 76 km 0
Source: NOAA SPC (EF0+, 1950–2024)

Wildfire History

7 wildfires (100+ acres) within 100 km. Largest: ROHRBACH (2,887 ac, 2022).

Year Name Acres Distance
2022 ROHRBACH 2,887 83 km
2003 JOEL BERTSCH 2 1,460 81 km
2004 TACOMA PARK PLACE 1,336 23 km
2004 ALLEN STUECKLE 1,330 93 km
2016 SLR 2016 RX MICHELL 1,242 36 km
2000 PHEASANT OPENER 1,206 60 km
1992 SPRING LK 1,001 96 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 11°F (-12°C) 0.5 in Coldest
February 18°F (-8°C) 0.5 in
March 30°F (-1°C) 1.3 in
April 45°F (7°C) 2.0 in
May 58°F (14°C) 2.6 in
June 67°F (19°C) 3.4 in Wettest
July 72°F (22°C) 2.8 in Warmest
August 70°F (21°C) 2.3 in
September 60°F (15°C) 1.9 in
October 47°F (8°C) 1.5 in
November 29°F (-2°C) 0.7 in
December 15°F (-9°C) 0.4 in Driest

Westport has a seasonal temperature swing of 61°F / from 11°F in January to 72°F in July. Total annual precipitation is 19.8 inches, with June being the wettest month (3.4") and December the driest (0.4").

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