Raritan, IL
Full City Profile · Illinois · Henderson County County
3.7
/5.0
B+
Good
155
Population
1,550/sq mi density
$77,361
Median Income
$27,529 per capita
$80,600
Home Value
$95,730 Zillow
51°F
Avg Temperature
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.2 / 5.0
$77,361 median income, 3.1% unemployment
A+
Affordability
5.0 / 5.0
$80,600 home value, /mo rent
D
Education
2.0 / 5.0
11.9% bachelor's degree or higher
Raritan experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 23°F in January while summers reach 75°F in July. Annual precipitation totals 39.1 inches. The area receives 21.8 inches of snow annually.
Temperature
23°F Jan (-5°C)
75°F Jul (24°C)
| Annual Average | 50.8°F |
| 6% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 760 ft (232 m) |
| Area | 0.0 sq mi (0.1 km²) |
| Population Density | 1,550/sq mi |
| Coordinates | 40.6958°N, 90.8251°W |
| Timezone | America/Chicago |
| County | Henderson County County |
| Nearest Airport | Southeast Iowa Regional (BRL) 17 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 17.5 / 100 |
| Social Vulnerability | 77.1 / 100 |
| Community Resilience | 37.1 / 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 Low |
| Winter Weather | Very Low |
| Lightning | Relatively 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 | 23°F (-5°C) | 1.6 in | Coldest, Driest |
| February | 28°F (-2°C) | 1.8 in | |
| March | 39°F (4°C) | 2.4 in | |
| April | 51°F (11°C) | 3.9 in | |
| May | 62°F (17°C) | 5.2 in | Wettest |
| June | 71°F (22°C) | 4.9 in | |
| July | 75°F (24°C) | 4.2 in | Warmest |
| August | 73°F (23°C) | 3.4 in | |
| September | 65°F (19°C) | 3.8 in | |
| October | 53°F (12°C) | 3.1 in | |
| November | 40°F (4°C) | 2.5 in | |
| December | 29°F (-2°C) | 2.1 in |
Raritan has a seasonal temperature swing of 51°F / from 23°F in January to 75°F in July. Total annual precipitation is 39.1 inches, with May being the wettest month (5.2") and January the driest (1.6").