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Agar, SD
Full City Profile · South Dakota · Sully County County
2.8
/5.0
C+
Fair
86
Population
410/sq mi density
$107,500
Home Value
$248,758 Zillow
$850
Median Rent
22.5% income on rent
46°F
Avg Temperature
276 sunny days/yr
C+
Overall
2.8 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Safety
2.5 / 5.0
0 violent crimes/100K
B
Education
3.1 / 5.0
26.6% bachelor's degree or higher
Agar experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 17°F in January while summers reach 74°F in July. The area gets 276 sunny days per year. Annual precipitation totals 21.1 inches. The area receives 48.8 inches of snow annually. Air quality is rated Good with a median AQI of 35.
Temperature
17°F Jan (-8°C)
74°F Jul (24°C)
| Annual Average | 46.0°F |
| 15% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 1,857 ft (566 m) |
| Area | 0.2 sq mi (0.4 km²) |
| Population Density | 410/sq mi |
| Coordinates | 44.8397°N, 100.0735°W |
| Timezone | America/Chicago |
| County | Sully County County |
| Nearest Airport | Pierre Regional (PIR) 33 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 6.3 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 75.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| 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 | 17°F (-8°C) | 0.4 in | Coldest, Driest |
| February | 21°F (-6°C) | 0.5 in | |
| March | 31°F (-0°C) | 1.2 in | |
| April | 45°F (7°C) | 2.1 in | |
| May | 57°F (14°C) | 2.7 in | |
| June | 67°F (19°C) | 3.0 in | Wettest |
| July | 74°F (24°C) | 2.4 in | Warmest |
| August | 72°F (22°C) | 2.1 in | |
| September | 61°F (16°C) | 1.3 in | |
| October | 48°F (9°C) | 1.1 in | |
| November | 30°F (-1°C) | 0.6 in | |
| December | 18°F (-8°C) | 0.6 in |
Agar has a seasonal temperature swing of 58°F / from 17°F in January to 74°F in July. Total annual precipitation is 18.1 inches, with June being the wettest month (3.0") and January the driest (0.4").