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Millbrook Colony, SD
Full City Profile · South Dakota · Hanson County County
1.0
/5.0
F
Poor
54
Population
235/sq mi density
45°F
Avg Temperature
291 sunny days/yr
436
Violent Crime/100K
3,699 property/100K
F
Overall
1.0 / 5.0
Below average overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
436 violent crimes/100K (15% above avg)
Millbrook Colony has a cool climate with an average annual temperature of 45°F (7°C). Winters average 16°F in January while summers reach 72°F in July. The area gets 291 sunny days per year. Annual precipitation totals 25.3 inches. The area receives 36.3 inches of snow annually. Air quality is rated Good with a median AQI of 35.
Temperature
16°F Jan (-9°C)
72°F Jul (22°C)
| Annual Average | 45.0°F |
| 17% below US avg | |
| January Average | 16°F (-9°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 291 days/yr |
Geography
| Elevation | 1,312 ft (400 m) |
| Area | 0.2 sq mi (0.6 km²) |
| Population Density | 235/sq mi |
| Coordinates | 43.6681°N, 97.8710°W |
| Timezone | America/Chicago |
| County | Hanson County County |
| Nearest Airport | Mitchell Municipal (MHE) 11 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 14.8 / 100 |
| Social Vulnerability | 87.7 / 100 |
| Community Resilience | 89.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very 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 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) | 0.4 in | Coldest, Driest |
| February | 22°F (-5°C) | 0.6 in | |
| March | 34°F (1°C) | 1.5 in | |
| April | 48°F (9°C) | 2.6 in | |
| May | 60°F (15°C) | 3.3 in | |
| June | 70°F (21°C) | 3.5 in | Wettest |
| July | 72°F (22°C) | 2.9 in | |
| August | 73°F (23°C) | 2.4 in | Warmest |
| September | 63°F (17°C) | 2.2 in | |
| October | 50°F (10°C) | 1.7 in | |
| November | 33°F (0°C) | 1.1 in | |
| December | 20°F (-7°C) | 0.4 in |
Millbrook Colony has a seasonal temperature swing of 57°F / from 16°F in January to 73°F in August. Total annual precipitation is 22.7 inches, with June being the wettest month (3.5") and January the driest (0.4").