Decker, IN
Full City Profile · Indiana · Knox County County
3.7
/5.0
B+
Good
204
Population
1,074/sq mi density
$47,188
Median Income
$32,682 per capita
$41,900
Home Value
$155,675 Zillow
55°F
Avg Temperature
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.9 / 5.0
$47,188 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$41,900 home value, /mo rent
C
Education
2.2 / 5.0
15.6% bachelor's degree or higher
Decker experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 30°F in January while summers reach 77°F in July. Annual precipitation totals 47.6 inches. The area receives 12.2 inches of snow annually. Air quality is rated Good with a median AQI of 38.
Temperature
30°F Jan (-1°C)
77°F Jul (25°C)
| Annual Average | 55.0°F |
| 2% above US avg | |
| January Average | 30°F (-1°C) |
| July Average | 77°F (25°C) |
Geography
| Elevation | 453 ft (138 m) |
| Area | 0.2 sq mi (0.5 km²) |
| Population Density | 1,074/sq mi |
| Coordinates | 38.5185°N, 87.5241°W |
| Timezone | America/Indiana/Indianapolis |
| County | Knox County County |
| Nearest Airport | Lawrenceville-Vincennes International (LWV) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
| Good Days % | 87.2% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0482 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 55.3 / 100 |
| Social Vulnerability | 37.2 / 100 |
| Community Resilience | 84.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| 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 | 30°F (-1°C) | 3.5 in | Coldest |
| February | 34°F (1°C) | 2.7 in | Driest |
| March | 44°F (7°C) | 3.8 in | |
| April | 55°F (13°C) | 4.9 in | |
| May | 65°F (18°C) | 5.4 in | Wettest |
| June | 74°F (23°C) | 4.7 in | |
| July | 77°F (25°C) | 4.4 in | Warmest |
| August | 76°F (24°C) | 3.4 in | |
| September | 69°F (20°C) | 3.6 in | |
| October | 57°F (14°C) | 3.6 in | |
| November | 44°F (7°C) | 4.0 in | |
| December | 35°F (2°C) | 3.6 in |
Decker has a seasonal temperature swing of 47°F / from 30°F in January to 77°F in July. Total annual precipitation is 47.6 inches, with May being the wettest month (5.4") and February the driest (2.7").