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Angostura, SD
Full City Profile · South Dakota · Fall River County County
3.0
/5.0
B
Good
114
Population
9/sq mi density
$135,893
Median Income
$65,580 per capita
47°F
Avg Temperature
302 sunny days/yr
86
Violent Crime/100K
690 property/100K
B
Overall
3.0 / 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
F
Safety
1.0 / 5.0
86 violent crimes/100K
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. The area gets 302 sunny days per year. Annual precipitation totals 18.2 inches. The area receives 36.8 inches of snow annually. Air quality is rated Good with a median AQI of 35.
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) |
| Sunny Days | 302 days/yr |
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
| AQI Median | 35.0 |
| Rating | Good |
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 | Driest |
| February | 28°F (-2°C) | 0.5 in | |
| March | 36°F (2°C) | 0.9 in | |
| April | 46°F (8°C) | 1.9 in | |
| May | 57°F (14°C) | 2.9 in | Wettest |
| June | 67°F (19°C) | 2.8 in | |
| July | 73°F (23°C) | 2.4 in | Warmest |
| August | 72°F (22°C) | 1.6 in | |
| September | 61°F (16°C) | 1.3 in | |
| October | 49°F (9°C) | 1.1 in | |
| November | 34°F (1°C) | 0.5 in | |
| December | 24°F (-4°C) | 0.4 in | Coldest |
Angostura has a seasonal temperature swing of 48°F / from 24°F in December to 73°F in July. Total annual precipitation is 16.6 inches, with May being the wettest month (2.9") and January the driest (0.4").