Angostura, SD
Full City Profile · South Dakota · Fall River County County
3.9
/5.0
B+
Good
114
Population
9/sq mi density
$135,893
Median Income
$65,580 per capita
47°F
Avg Temperature
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$135,893 median income, 0.0% unemployment
C+
Education
2.9 / 5.0
23.2% bachelor's degree or higher
Angostura experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 25°F in January while summers reach 73°F in July. Annual precipitation totals 18.2 inches. The area receives 36.8 inches of snow annually.
Temperature
25°F Jan (-4°C)
73°F Jul (23°C)
| Annual Average | 47.2°F |
| 13% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 73°F (23°C) |
Geography
| Elevation | 3,311 ft (1,009 m) |
| Area | 12.6 sq mi (32.6 km²) |
| Population Density | 9/sq mi |
| Coordinates | 43.3189°N, 103.3907°W |
| Timezone | America/Chicago |
| County | Fall River County County |
| Nearest Airport | Rapid City Regional (RAP) 53 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 30.9 / 100 |
| Social Vulnerability | 92.2 / 100 |
| Community Resilience | 74.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 0.4 in | Coldest, Driest |
| February | 27°F (-3°C) | 0.6 in | |
| March | 36°F (2°C) | 0.9 in | |
| April | 45°F (7°C) | 2.0 in | |
| May | 55°F (13°C) | 3.3 in | Wettest |
| June | 65°F (19°C) | 3.1 in | |
| July | 73°F (23°C) | 2.4 in | Warmest |
| August | 71°F (21°C) | 2.0 in | |
| September | 61°F (16°C) | 1.5 in | |
| October | 47°F (9°C) | 1.3 in | |
| November | 35°F (2°C) | 0.5 in | |
| December | 26°F (-3°C) | 0.4 in |
Angostura has a seasonal temperature swing of 48°F / from 25°F in January to 73°F in July. Total annual precipitation is 18.2 inches, with May being the wettest month (3.3") and January the driest (0.4").