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Boulder Canyon, SD
Full City Profile · South Dakota · Lawrence County County
3.5
/5.0
B+
Good
487
Population
159/sq mi density
$71,846
Median Income
$39,779 per capita
$510,400
Home Value
$404,708 Zillow
45°F
Avg Temperature
258 sunny days/yr
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.4 / 5.0
$71,846 median income, 0.0% unemployment
C+
Affordability
2.7 / 5.0
$510,400 home value, /mo rent
B
Education
3.4 / 5.0
30.4% bachelor's degree or higher
Boulder Canyon has a cool climate with an average annual temperature of 45°F (7°C). Winters average 26°F in January while summers reach 69°F in July. The area gets 258 sunny days per year. Air quality is rated Good with a median AQI of 35.
Temperature
26°F Jan (-3°C)
69°F Jul (21°C)
| Annual Average | 45.4°F |
| 16% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 258 days/yr |
Geography
| Elevation | 4,045 ft (1,233 m) |
| Area | 3.1 sq mi (7.9 km²) |
| Population Density | 159/sq mi |
| Coordinates | 44.3971°N, 103.6046°W |
| Timezone | America/Chicago |
| County | Lawrence County County |
| Nearest Airport | Ellsworth Afb (RCA) 30 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 49.3 / 100 |
| Social Vulnerability | 35.5 / 100 |
| Community Resilience | 54.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 0.8 in | Coldest, Driest |
| February | 27°F (-3°C) | 0.9 in | |
| March | 33°F (1°C) | 1.7 in | |
| April | 43°F (6°C) | 3.0 in | |
| May | 53°F (12°C) | 3.9 in | Wettest |
| June | 63°F (17°C) | 3.9 in | |
| July | 69°F (21°C) | 2.4 in | Warmest |
| August | 69°F (20°C) | 2.0 in | |
| September | 59°F (15°C) | 1.8 in | |
| October | 47°F (8°C) | 1.6 in | |
| November | 34°F (1°C) | 1.1 in | |
| December | 26°F (-3°C) | 1.0 in |
Boulder Canyon has a seasonal temperature swing of 43°F / from 26°F in January to 69°F in July. Total annual precipitation is 24.0 inches, with May being the wettest month (3.9") and January the driest (0.8").