All Countries
Custer, SD
Full City Profile · South Dakota · Custer County County
3.5
/5.0
B+
Good
2,148
Population
839/sq mi density
$80,188
Median Income
$51,795 per capita
$229,500
Home Value
$464,861 Zillow
$926
Median Rent
23.0% income on rent
45°F
Avg Temperature
291 sunny days/yr
86
Violent Crime/100K
690 property/100K
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.6 / 5.0
$80,188 median income, 1.7% unemployment
A+
Affordability
5.0 / 5.0
$229,500 home value, $926/mo rent
F
Safety
1.0 / 5.0
86 violent crimes/100K
B
Education
3.4 / 5.0
30.1% bachelor's degree or higher
Custer has a cool climate with an average annual temperature of 45°F (7°C). Winters average 27°F in January while summers reach 68°F in July. The area gets 291 sunny days per year. Annual precipitation totals 20.7 inches. The area receives 57.9 inches of snow annually. Air quality is rated Good with a median AQI of 44.
Temperature
27°F Jan (-3°C)
68°F Jul (20°C)
| Annual Average | 45.0°F |
| 17% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 291 days/yr |
Geography
| Elevation | 5,316 ft (1,620 m) |
| Area | 2.5 sq mi (6.6 km²) |
| Population Density | 839/sq mi |
| Coordinates | 43.7667°N, 103.5996°W |
| Timezone | America/Chicago |
| County | Custer County County |
| Nearest Airport | Rapid City Regional (RAP) 33 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
| Good Days % | 75.4% |
| Unhealthy Days | 9 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0488 ppm |
| PM2.5 (Fine Particles) | 4.8 μg/m³ |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 16.4 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 47.0 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Moderate |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 27°F (-3°C) | 0.4 in | Driest |
| February | 27°F (-3°C) | 0.6 in | |
| March | 32°F (-0°C) | 1.0 in | |
| April | 39°F (4°C) | 2.1 in | |
| May | 50°F (10°C) | 3.4 in | Wettest |
| June | 59°F (15°C) | 3.4 in | |
| July | 68°F (20°C) | 2.9 in | Warmest |
| August | 65°F (18°C) | 2.0 in | |
| September | 55°F (13°C) | 1.5 in | |
| October | 44°F (7°C) | 1.1 in | |
| November | 32°F (-0°C) | 0.6 in | |
| December | 25°F (-4°C) | 0.6 in | Coldest |
Custer has a seasonal temperature swing of 43°F / from 25°F in December to 68°F in July. Total annual precipitation is 19.6 inches, with May being the wettest month (3.4") and January the driest (0.4").