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Clear Lake, SD
Full City Profile · South Dakota · Deuel County County
3.5
/5.0
B+
Good
30
Population
9/sq mi density
$22,679
Median Income
$17,443 per capita
42°F
Avg Temperature
276 sunny days/yr
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.1 / 5.0
$22,679 median income, 0.0% unemployment
C+
Safety
2.5 / 5.0
0 violent crimes/100K
A+
Education
5.0 / 5.0
0.0% bachelor's degree or higher
Clear Lake has a cool climate with an average annual temperature of 42°F (6°C). Winters average 12°F in January while summers reach 70°F in July. The area gets 276 sunny days per year. Annual precipitation totals 27.5 inches. The area receives 60.7 inches of snow annually. Air quality is rated Good with a median AQI of 35.
Temperature
12°F Jan (-11°C)
70°F Jul (21°C)
| Annual Average | 42.4°F |
| 21% below US avg | |
| January Average | 12°F (-11°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 1,837 ft (560 m) |
| Area | 3.3 sq mi (8.5 km²) |
| Population Density | 9/sq mi |
| Coordinates | 44.7563°N, 96.6902°W |
| Timezone | America/Chicago |
| County | Deuel County County |
| Nearest Airport | Watertown Regional (ATY) 25 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 6.9 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 70.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 12°F (-11°C) | 0.6 in | Coldest |
| February | 17°F (-8°C) | 0.6 in | |
| March | 29°F (-2°C) | 1.5 in | |
| April | 44°F (6°C) | 2.2 in | |
| May | 57°F (14°C) | 3.0 in | |
| June | 66°F (19°C) | 3.8 in | Wettest |
| July | 70°F (21°C) | 3.4 in | Warmest |
| August | 69°F (20°C) | 3.0 in | |
| September | 59°F (15°C) | 2.2 in | |
| October | 46°F (8°C) | 2.0 in | |
| November | 29°F (-2°C) | 1.0 in | |
| December | 16°F (-9°C) | 0.5 in | Driest |
Clear Lake has a seasonal temperature swing of 59°F / from 12°F in January to 70°F in July. Total annual precipitation is 23.8 inches, with June being the wettest month (3.8") and December the driest (0.5").