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Duncan, OK
Full City Profile · Oklahoma · Stephens County County
3.0
/5.0
B
Good
22,872
Population
533/sq mi density
$57,020
Median Income
$33,531 per capita
$125,800
Home Value
$131,900 Zillow
$872
Median Rent
27.8% income on rent
64°F
Avg Temperature
320 sunny days/yr
166
Violent Crime/100K
3,288 property/100K
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.5 / 5.0
$57,020 median income, 3.4% unemployment
A+
Affordability
5.0 / 5.0
$125,800 home value, $872/mo rent
F
Safety
1.0 / 5.0
166 violent crimes/100K
C+
Education
2.6 / 5.0
19.5% bachelor's degree or higher
Duncan enjoys a temperate climate with an average annual temperature of 64°F (18°C). Winters average 43°F in January while summers reach 85°F in July. The area gets 320 sunny days per year. Annual precipitation totals 32.2 inches. The area receives 1.9 inches of snow annually. Air quality is rated Good with a median AQI of 45.
Temperature
43°F Jan (6°C)
85°F Jul (29°C)
| Annual Average | 64.2°F |
| 19% above US avg | |
| January Average | 43°F (6°C) |
| July Average | 85°F (29°C) |
| Sunny Days | 320 days/yr |
Geography
| Elevation | 1,113 ft (339 m) |
| Area | 47.7 sq mi (123.6 km²) |
| Population Density | 533/sq mi |
| Coordinates | 34.4816°N, 97.9605°W |
| Timezone | America/Chicago |
| County | Stephens County County |
| Nearest Airport | Lawton-Fort Sill Regional (LAW) 27 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 45.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 65.9 / 100 |
| Social Vulnerability | 52.8 / 100 |
| Community Resilience | 27.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 43°F (6°C) | 1.2 in | Driest |
| February | 44°F (7°C) | 1.7 in | |
| March | 53°F (12°C) | 2.5 in | |
| April | 62°F (16°C) | 2.9 in | |
| May | 70°F (21°C) | 5.0 in | Wettest |
| June | 78°F (25°C) | 4.0 in | |
| July | 85°F (29°C) | 2.1 in | Warmest |
| August | 82°F (28°C) | 2.5 in | |
| September | 75°F (24°C) | 4.0 in | |
| October | 64°F (18°C) | 3.5 in | |
| November | 51°F (11°C) | 2.1 in | |
| December | 43°F (6°C) | 1.7 in | Coldest |
Duncan has a seasonal temperature swing of 42°F / from 43°F in December to 85°F in July. Total annual precipitation is 33.1 inches, with May being the wettest month (5.0") and January the driest (1.2").