Jefferson, SD
Full City Profile · South Dakota · Dakota County County
3.5
/5.0
B+
Good
717
Population
1,406/sq mi density
$81,149
Median Income
$32,917 per capita
$177,900
Home Value
$399,303 Zillow
48°F
Avg Temperature
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.4 / 5.0
$81,149 median income, 9.9% unemployment
A+
Affordability
5.0 / 5.0
$177,900 home value, /mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
C+
Education
3.0 / 5.0
24.8% bachelor's degree or higher
Jefferson experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 20°F in January while summers reach 74°F in July. Annual precipitation totals 32.3 inches. The area receives 36.0 inches of snow annually.
Temperature
20°F Jan (-7°C)
74°F Jul (23°C)
| Annual Average | 48.4°F |
| 10% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 74°F (23°C) |
Geography
| Elevation | 1,115 ft (340 m) |
| Area | 0.5 sq mi (1.3 km²) |
| Population Density | 1,406/sq mi |
| Coordinates | 42.6043°N, 96.5661°W |
| Timezone | America/Chicago |
| County | Dakota County County |
| Nearest Airport | Sioux Gateway/Brig General Bud Day Field (SUX) 17 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 36.0 / 100 |
| Social Vulnerability | 34.2 / 100 |
| Community Resilience | 8.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 0.8 in | Coldest, Driest |
| February | 25°F (-4°C) | 1.0 in | |
| March | 37°F (3°C) | 1.9 in | |
| April | 49°F (9°C) | 3.1 in | |
| May | 61°F (16°C) | 4.5 in | |
| June | 71°F (22°C) | 5.0 in | Wettest |
| July | 74°F (23°C) | 3.8 in | Warmest |
| August | 72°F (22°C) | 3.5 in | |
| September | 64°F (18°C) | 3.6 in | |
| October | 50°F (10°C) | 2.4 in | |
| November | 36°F (2°C) | 1.5 in | |
| December | 24°F (-4°C) | 1.2 in |
Jefferson has a seasonal temperature swing of 54°F / from 20°F in January to 74°F in July. Total annual precipitation is 32.3 inches, with June being the wettest month (5.0") and January the driest (0.8").