New Boston, IL
Full City Profile · Illinois · Mercer County County
3.3
/5.0
B
Good
632
Population
672/sq mi density
$61,563
Median Income
$30,823 per capita
$100,700
Home Value
$145,753 Zillow
$483
Median Rent
29.3% income on rent
51°F
Avg Temperature
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.1 / 5.0
$61,563 median income, 5.2% unemployment
A+
Affordability
5.0 / 5.0
$100,700 home value, $483/mo rent
D
Education
1.8 / 5.0
10.4% bachelor's degree or higher
New Boston experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 23°F in January while summers reach 76°F in July. Annual precipitation totals 36.3 inches. The area receives 20.4 inches of snow annually.
Temperature
23°F Jan (-5°C)
76°F Jul (24°C)
| Annual Average | 51.2°F |
| 5% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 76°F (24°C) |
Geography
| Elevation | 576 ft (176 m) |
| Area | 0.9 sq mi (2.4 km²) |
| Population Density | 672/sq mi |
| Coordinates | 41.1704°N, 90.9998°W |
| Timezone | America/Chicago |
| County | Mercer County County |
| Nearest Airport | Southeast Iowa Regional (BRL) 28 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 8.8 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 85.7 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| 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 | 23°F (-5°C) | 1.3 in | Coldest, Driest |
| February | 28°F (-3°C) | 1.7 in | |
| March | 39°F (4°C) | 2.6 in | |
| April | 51°F (11°C) | 3.6 in | |
| May | 62°F (17°C) | 5.1 in | Wettest |
| June | 72°F (22°C) | 4.6 in | |
| July | 76°F (24°C) | 3.5 in | Warmest |
| August | 73°F (23°C) | 3.8 in | |
| September | 66°F (19°C) | 3.3 in | |
| October | 54°F (12°C) | 2.9 in | |
| November | 41°F (5°C) | 2.1 in | |
| December | 29°F (-1°C) | 1.8 in |
New Boston has a seasonal temperature swing of 52°F / from 23°F in January to 76°F in July. Total annual precipitation is 36.3 inches, with May being the wettest month (5.1") and January the driest (1.3").