All Countries
Hermosa, SD
Full City Profile · South Dakota · Custer County County
3.4
/5.0
B
Good
296
Population
340/sq mi density
$53,194
Median Income
$37,019 per capita
$108,800
Home Value
$518,744 Zillow
$1,259
Median Rent
28.3% income on rent
46°F
Avg Temperature
291 sunny days/yr
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$53,194 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$108,800 home value, $1,259/mo rent
D
Education
1.5 / 5.0
6.5% bachelor's degree or higher
Hermosa experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 28°F in January while summers reach 69°F in July. The area gets 291 sunny days per year. Annual precipitation totals 24.1 inches. The area receives 59.3 inches of snow annually. Air quality is rated Good with a median AQI of 35.
Temperature
28°F Jan (-2°C)
69°F Jul (21°C)
| Annual Average | 45.7°F |
| 15% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 291 days/yr |
Geography
| Elevation | 3,324 ft (1,013 m) |
| Area | 0.5 sq mi (1.2 km²) |
| Population Density | 340/sq mi |
| Coordinates | 43.8399°N, 103.1905°W |
| Timezone | America/Chicago |
| County | Custer County County |
| Nearest Airport | Rapid City Regional (RAP) 16 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
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 | 28°F (-2°C) | 0.3 in | Driest |
| February | 28°F (-2°C) | 0.4 in | |
| March | 35°F (2°C) | 0.9 in | |
| April | 44°F (7°C) | 2.0 in | |
| May | 54°F (12°C) | 3.2 in | Wettest |
| June | 64°F (18°C) | 3.2 in | |
| July | 69°F (21°C) | 2.6 in | |
| August | 70°F (21°C) | 1.7 in | Warmest |
| September | 60°F (15°C) | 1.3 in | |
| October | 48°F (9°C) | 1.2 in | |
| November | 34°F (1°C) | 0.5 in | |
| December | 27°F (-3°C) | 0.4 in | Coldest |
Hermosa has a seasonal temperature swing of 43°F / from 27°F in December to 70°F in August. Total annual precipitation is 17.6 inches, with May being the wettest month (3.2") and January the driest (0.3").