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Knoxville, IA
Full City Profile · Iowa · Marion County County
3.5
/5.0
B+
Good
7,493
Population
1,622/sq mi density
$70,136
Median Income
$38,253 per capita
$147,600
Home Value
$201,025 Zillow
$810
Median Rent
24.7% income on rent
50°F
Avg Temperature
275 sunny days/yr
164
Violent Crime/100K
1,604 property/100K
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.4 / 5.0
$70,136 median income, 1.2% unemployment
A+
Affordability
5.0 / 5.0
$147,600 home value, $810/mo rent
F
Safety
1.0 / 5.0
164 violent crimes/100K
B+
Education
3.5 / 5.0
31.3% bachelor's degree or higher
Knoxville experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 21°F in January while summers reach 75°F in July. The area gets 275 sunny days per year. Annual precipitation totals 37.5 inches. Air quality is rated Good with a median AQI of 43.
Temperature
21°F Jan (-6°C)
75°F Jul (24°C)
| Annual Average | 49.9°F |
| 8% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 911 ft (278 m) |
| Area | 4.6 sq mi (12.0 km²) |
| Population Density | 1,622/sq mi |
| Coordinates | 41.3185°N, 93.1026°W |
| Timezone | America/Chicago |
| County | Marion County County |
| Nearest Airport | Des Moines International (DSM) 33 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 34.4 / 100 |
| Social Vulnerability | 13.4 / 100 |
| Community Resilience | 96.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| 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 | 21°F (-6°C) | 2.5 in | Coldest, Driest |
| February | 27°F (-3°C) | 2.5 in | |
| March | 39°F (4°C) | 3.7 in | |
| April | 51°F (10°C) | 3.6 in | |
| May | 62°F (17°C) | 4.2 in | |
| June | 71°F (22°C) | 4.3 in | |
| July | 75°F (24°C) | 4.5 in | Warmest, Wettest |
| August | 73°F (23°C) | 3.6 in | |
| September | 65°F (18°C) | 3.7 in | |
| October | 53°F (12°C) | 2.8 in | |
| November | 39°F (4°C) | 3.1 in | |
| December | 26°F (-3°C) | 2.8 in |
Knoxville has a seasonal temperature swing of 54°F / from 21°F in January to 75°F in July. Total annual precipitation is 41.3 inches, with July being the wettest month (4.5") and January the driest (2.5").