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Roslyn, SD
Full City Profile · South Dakota · Day County County
3.0
/5.0
B
Good
174
Population
791/sq mi density
$44,375
Median Income
$24,068 per capita
$77,100
Home Value
$401,127 Zillow
$558
Median Rent
31.9% income on rent
44°F
Avg Temperature
276 sunny days/yr
449
Violent Crime/100K
1,142 property/100K
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.9 / 5.0
$44,375 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$77,100 home value, $558/mo rent
F
Safety
1.0 / 5.0
449 violent crimes/100K (18% above avg)
C
Education
2.3 / 5.0
16.2% bachelor's degree or higher
Roslyn has a cool climate with an average annual temperature of 44°F (7°C). Winters average 13°F in January while summers reach 72°F in July. The area gets 276 sunny days per year. Annual precipitation totals 22.5 inches. The area receives 35.6 inches of snow annually. Air quality is rated Good with a median AQI of 35.
Temperature
13°F Jan (-11°C)
72°F Jul (22°C)
| Annual Average | 44.1°F |
| 18% below US avg | |
| January Average | 13°F (-11°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 1,867 ft (569 m) |
| Area | 0.2 sq mi (0.5 km²) |
| Population Density | 791/sq mi |
| Coordinates | 45.4966°N, 97.4927°W |
| Timezone | America/Chicago |
| County | Day County County |
| Nearest Airport | Watertown Regional (ATY) 43 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 27.6 / 100 |
| Social Vulnerability | 74.7 / 100 |
| Community Resilience | 84.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Very Low |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 13°F (-11°C) | 0.5 in | Coldest |
| February | 17°F (-8°C) | 0.5 in | |
| March | 28°F (-2°C) | 1.1 in | |
| April | 43°F (6°C) | 1.8 in | |
| May | 57°F (14°C) | 2.8 in | |
| June | 66°F (19°C) | 3.4 in | Wettest |
| July | 72°F (22°C) | 3.1 in | Warmest |
| August | 70°F (21°C) | 2.8 in | |
| September | 59°F (15°C) | 1.9 in | |
| October | 46°F (8°C) | 1.4 in | |
| November | 29°F (-2°C) | 0.7 in | |
| December | 16°F (-9°C) | 0.4 in | Driest |
Roslyn has a seasonal temperature swing of 59°F / from 13°F in January to 72°F in July. Total annual precipitation is 20.5 inches, with June being the wettest month (3.4") and December the driest (0.4").