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Twin Brooks, SD
Full City Profile · South Dakota · Grant County County
2.7
/5.0
C+
Fair
35
Population
85/sq mi density
$63,125
Median Income
$34,063 per capita
$75,000
Home Value
$233,146 Zillow
44°F
Avg Temperature
258 sunny days/yr
262
Violent Crime/100K
2,215 property/100K
C+
Overall
2.7 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$63,125 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$75,000 home value, /mo rent
F
Safety
1.0 / 5.0
262 violent crimes/100K
F
Education
1.2 / 5.0
3.1% bachelor's degree or higher
Twin Brooks has a cool climate with an average annual temperature of 44°F (7°C). Winters average 12°F in January while summers reach 73°F in July. The area gets 258 sunny days per year. Air quality is rated Good with a median AQI of 35.
Temperature
12°F Jan (-11°C)
73°F Jul (23°C)
| Annual Average | 44.0°F |
| 19% below US avg | |
| January Average | 12°F (-11°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 258 days/yr |
Geography
| Elevation | 1,259 ft (384 m) |
| Area | 0.4 sq mi (1.1 km²) |
| Population Density | 85/sq mi |
| Coordinates | 45.2090°N, 96.7855°W |
| Timezone | America/Chicago |
| County | Grant County County |
| Nearest Airport | Watertown Regional (ATY) 27 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 18.9 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 78.9 / 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 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 | 12°F (-11°C) | 0.5 in | Coldest |
| February | 18°F (-8°C) | 0.5 in | |
| March | 30°F (-1°C) | 1.4 in | |
| April | 45°F (7°C) | 2.2 in | |
| May | 58°F (15°C) | 2.7 in | |
| June | 67°F (20°C) | 3.5 in | Wettest |
| July | 73°F (23°C) | 3.3 in | Warmest |
| August | 70°F (21°C) | 2.7 in | |
| September | 60°F (16°C) | 2.0 in | |
| October | 48°F (9°C) | 1.8 in | |
| November | 30°F (-1°C) | 1.0 in | |
| December | 17°F (-8°C) | 0.4 in | Driest |
Twin Brooks has a seasonal temperature swing of 61°F / from 12°F in January to 73°F in July. Total annual precipitation is 22.0 inches, with June being the wettest month (3.5") and December the driest (0.4").