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Fairfield, IL
Full City Profile · Illinois · Wayne County County
2.9
/5.0
C+
Fair
4,658
Population
1,136/sq mi density
$41,026
Median Income
$33,524 per capita
$91,800
Home Value
$120,091 Zillow
$558
Median Rent
30.3% income on rent
57°F
Avg Temperature
293 sunny days/yr
161
Violent Crime/100K
2,540 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
B
Economy
3.4 / 5.0
$41,026 median income, 1.7% unemployment
A+
Affordability
5.0 / 5.0
$91,800 home value, $558/mo rent
F
Safety
1.0 / 5.0
161 violent crimes/100K
C
Education
2.2 / 5.0
14.6% bachelor's degree or higher
Fairfield enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 33°F in January while summers reach 79°F in July. The area gets 293 sunny days per year. Annual precipitation totals 46.0 inches. Air quality is rated Good with a median AQI of 43.
Temperature
33°F Jan (0°C)
79°F Jul (26°C)
| Annual Average | 57.1°F |
| 6% above US avg | |
| January Average | 33°F (0°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 460 ft (140 m) |
| Area | 1.6 sq mi (4.1 km²) |
| Population Density | 1,136/sq mi |
| Coordinates | 38.3806°N, 88.3725°W |
| Timezone | America/Chicago |
| County | Wayne County County |
| Nearest Airport | Lawrenceville-Vincennes International (LWV) 49 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 40.7 / 100 |
| Social Vulnerability | 32.0 / 100 |
| Community Resilience | 53.7 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| 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 | 33°F (0°C) | 2.4 in | Coldest, Driest |
| February | 34°F (1°C) | 2.6 in | |
| March | 45°F (7°C) | 4.5 in | |
| April | 55°F (13°C) | 4.3 in | |
| May | 65°F (18°C) | 4.7 in | Wettest |
| June | 74°F (23°C) | 4.0 in | |
| July | 79°F (26°C) | 3.9 in | Warmest |
| August | 76°F (24°C) | 3.2 in | |
| September | 69°F (20°C) | 3.0 in | |
| October | 57°F (14°C) | 3.2 in | |
| November | 45°F (7°C) | 4.0 in | |
| December | 34°F (1°C) | 3.7 in |
Fairfield has a seasonal temperature swing of 46°F / from 33°F in January to 79°F in July. Total annual precipitation is 43.4 inches, with May being the wettest month (4.7") and January the driest (2.4").