Lake Madison, SD
Full City Profile · South Dakota · McCook County County
4.7
/5.0
A+
Excellent
885
Population
188/sq mi density
$116,648
Median Income
$95,163 per capita
$496,600
Home Value
$483,817 Zillow
$595
Median Rent
17.2% income on rent
46°F
Avg Temperature
A+
Overall
4.7 / 5.0
Strong
A+
Economy
4.8 / 5.0
$116,648 median income, 3.2% unemployment
A
Affordability
4.3 / 5.0
$496,600 home value, $595/mo rent
A+
Education
4.9 / 5.0
48.5% bachelor's degree or higher
Lake Madison experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 16°F in January while summers reach 72°F in July. Annual precipitation totals 26.8 inches. The area receives 38.1 inches of snow annually.
Temperature
16°F Jan (-9°C)
72°F Jul (22°C)
| Annual Average | 45.9°F |
| 15% below US avg | |
| January Average | 16°F (-9°C) |
| July Average | 72°F (22°C) |
Geography
| Elevation | 1,614 ft (492 m) |
| Area | 4.7 sq mi (12.2 km²) |
| Population Density | 188/sq mi |
| Coordinates | 43.9551°N, 97.0266°W |
| Timezone | America/Chicago |
| County | McCook County County |
| Nearest Airport | Brookings Regional (BKX) 26 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 43.5 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 83.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Very Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 16°F (-9°C) | 0.5 in | Coldest, Driest |
| February | 21°F (-6°C) | 0.8 in | |
| March | 33°F (0°C) | 1.2 in | |
| April | 46°F (8°C) | 2.5 in | |
| May | 58°F (15°C) | 3.5 in | |
| June | 68°F (20°C) | 4.4 in | Wettest |
| July | 72°F (22°C) | 3.2 in | Warmest |
| August | 70°F (21°C) | 3.3 in | |
| September | 63°F (17°C) | 3.3 in | |
| October | 49°F (9°C) | 1.9 in | |
| November | 34°F (1°C) | 1.2 in | |
| December | 21°F (-6°C) | 1.0 in |
Lake Madison has a seasonal temperature swing of 56°F / from 16°F in January to 72°F in July. Total annual precipitation is 26.8 inches, with June being the wettest month (4.4") and January the driest (0.5").