All Countries
Allen, SD
Full City Profile · South Dakota · Bennett County County
2.2
/5.0
C
Fair
860
Population
265/sq mi density
$618
Median Rent
27.7% income on rent
47°F
Avg Temperature
291 sunny days/yr
746
Violent Crime/100K
2,982 property/100K
C
Overall
2.2 / 5.0
Fair overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
746 violent crimes/100K (96% above avg)
B
Education
3.4 / 5.0
0.0% bachelor's degree or higher
Allen experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 24°F in January while summers reach 73°F in July. The area gets 291 sunny days per year. Annual precipitation totals 20.7 inches. The area receives 48.4 inches of snow annually. Air quality is rated Good with a median AQI of 35.
Temperature
24°F Jan (-5°C)
73°F Jul (23°C)
| Annual Average | 47.4°F |
| 12% below US avg | |
| January Average | 24°F (-5°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 291 days/yr |
Geography
| Elevation | 3,296 ft (1,005 m) |
| Area | 3.2 sq mi (8.4 km²) |
| Population Density | 265/sq mi |
| Coordinates | 43.2791°N, 101.9265°W |
| Timezone | America/Chicago |
| County | Bennett County County |
| Nearest Airport | Rapid City Regional (RAP) 77 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 5.9 / 100 |
| Social Vulnerability | 93.8 / 100 |
| Community Resilience | 2.7 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively 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 | 24°F (-5°C) | 0.3 in | Coldest, Driest |
| February | 27°F (-3°C) | 0.4 in | |
| March | 35°F (2°C) | 1.0 in | |
| April | 45°F (7°C) | 1.9 in | |
| May | 56°F (13°C) | 3.0 in | |
| June | 66°F (19°C) | 3.3 in | Wettest |
| July | 73°F (23°C) | 2.8 in | Warmest |
| August | 71°F (22°C) | 1.7 in | |
| September | 61°F (16°C) | 1.4 in | |
| October | 48°F (9°C) | 1.1 in | |
| November | 33°F (1°C) | 0.5 in | |
| December | 25°F (-4°C) | 0.4 in |
Allen has a seasonal temperature swing of 49°F / from 24°F in January to 73°F in July. Total annual precipitation is 17.6 inches, with June being the wettest month (3.3") and January the driest (0.3").