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Fort Thompson, SD
Full City Profile · South Dakota · Buffalo County County
2.4
/5.0
C
Fair
1,134
Population
109/sq mi density
$45,313
Median Income
$15,513 per capita
$110,300
Home Value
$240,737 Zillow
$515
Median Rent
21.4% income on rent
47°F
Avg Temperature
276 sunny days/yr
855
Violent Crime/100K
4,599 property/100K
C
Overall
2.4 / 5.0
Fair overall score based on economy, affordability, safety and education
C
Economy
2.1 / 5.0
$45,313 median income, 6.2% unemployment
A+
Affordability
5.0 / 5.0
$110,300 home value, $515/mo rent
F
Safety
1.0 / 5.0
855 violent crimes/100K (125% above avg)
F
Education
1.3 / 5.0
4.3% bachelor's degree or higher
Fort Thompson experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 18°F in January while summers reach 74°F in July. The area gets 276 sunny days per year. Annual precipitation totals 20.1 inches. The area receives 18.9 inches of snow annually. Air quality is rated Good with a median AQI of 35.
Temperature
18°F Jan (-8°C)
74°F Jul (24°C)
| Annual Average | 46.7°F |
| 14% below US avg | |
| January Average | 18°F (-8°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 1,437 ft (438 m) |
| Area | 12.6 sq mi (32.6 km²) |
| Population Density | 109/sq mi |
| Coordinates | 44.0549°N, 99.4048°W |
| Timezone | America/Chicago |
| County | Buffalo County County |
| Nearest Airport | Pierre Regional (PIR) 49 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 13.7 / 100 |
| Social Vulnerability | 66.6 / 100 |
| Community Resilience | 0.5 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 18°F (-8°C) | 0.3 in | Coldest, Driest |
| February | 22°F (-5°C) | 0.4 in | |
| March | 32°F (0°C) | 1.2 in | |
| April | 46°F (8°C) | 2.1 in | |
| May | 58°F (14°C) | 2.8 in | |
| June | 68°F (20°C) | 3.0 in | Wettest |
| July | 74°F (24°C) | 2.7 in | Warmest |
| August | 73°F (23°C) | 2.1 in | |
| September | 63°F (17°C) | 1.6 in | |
| October | 50°F (10°C) | 1.4 in | |
| November | 33°F (1°C) | 0.6 in | |
| December | 21°F (-6°C) | 0.4 in |
Fort Thompson has a seasonal temperature swing of 56°F / from 18°F in January to 74°F in July. Total annual precipitation is 18.5 inches, with June being the wettest month (3.0") and January the driest (0.3").