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Fairfield, IA
Full City Profile · Iowa · Jefferson County County
3.6
/5.0
B+
Good
9,438
Population
1,428/sq mi density
$48,302
Median Income
$35,227 per capita
$152,900
Home Value
$157,132 Zillow
$864
Median Rent
36.3% income on rent
50°F
Avg Temperature
275 sunny days/yr
95
Violent Crime/100K
3,016 property/100K
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.4 / 5.0
$48,302 median income, 4.0% unemployment
A+
Affordability
4.9 / 5.0
$152,900 home value, $864/mo rent
F
Safety
1.0 / 5.0
95 violent crimes/100K
A+
Education
5.0 / 5.0
51.2% bachelor's degree or higher
Fairfield experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 22°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 38.4 inches. The area receives 21.7 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
22°F Jan (-6°C)
74°F Jul (23°C)
| Annual Average | 49.7°F |
| 8% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 776 ft (237 m) |
| Area | 6.4 sq mi (16.6 km²) |
| Population Density | 1,428/sq mi |
| Coordinates | 41.0064°N, 91.9666°W |
| Timezone | America/Chicago |
| County | Jefferson County County |
| Nearest Airport | Ottumwa Regional (OTM) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 27.1 / 100 |
| Social Vulnerability | 62.3 / 100 |
| Community Resilience | 50.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 1.2 in | Coldest |
| February | 27°F (-3°C) | 1.1 in | Driest |
| March | 39°F (4°C) | 2.4 in | |
| April | 51°F (11°C) | 3.5 in | |
| May | 62°F (17°C) | 4.5 in | |
| June | 72°F (22°C) | 4.0 in | |
| July | 74°F (23°C) | 4.5 in | Warmest, Wettest |
| August | 73°F (23°C) | 4.2 in | |
| September | 65°F (19°C) | 4.2 in | |
| October | 54°F (12°C) | 2.9 in | |
| November | 39°F (4°C) | 2.4 in | |
| December | 27°F (-3°C) | 1.7 in |
Fairfield has a seasonal temperature swing of 52°F / from 22°F in January to 74°F in July. Total annual precipitation is 36.5 inches, with July being the wettest month (4.5") and February the driest (1.1").