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Joslin, IL
Full City Profile · Illinois · Henry County County
3.7
/5.0
B+
Good
44
Population
9/sq mi density
$39,722
Median Income
$32,652 per capita
$118,100
Home Value
$154,113 Zillow
51°F
Avg Temperature
275 sunny days/yr
107
Violent Crime/100K
1,576 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.8 / 5.0
$39,722 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$118,100 home value, /mo rent
F
Safety
1.0 / 5.0
107 violent crimes/100K
A+
Education
5.0 / 5.0
0.0% bachelor's degree or higher
Joslin experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 22°F in January while summers reach 76°F in July. The area gets 275 sunny days per year. Annual precipitation totals 37.1 inches. Air quality is rated Good with a median AQI of 43.
Temperature
22°F Jan (-5°C)
76°F Jul (24°C)
| Annual Average | 50.6°F |
| 6% below US avg | |
| January Average | 22°F (-5°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 573 ft (175 m) |
| Area | 4.6 sq mi (12.0 km²) |
| Population Density | 9/sq mi |
| Coordinates | 41.5446°N, 90.2219°W |
| Timezone | America/Chicago |
| County | Henry County County |
| Nearest Airport | Quad Cities International (MLI) 16 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 57.1 / 100 |
| Social Vulnerability | 14.8 / 100 |
| Community Resilience | 83.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively High |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-5°C) | 1.4 in | Coldest |
| February | 26°F (-4°C) | 1.3 in | Driest |
| March | 37°F (3°C) | 2.6 in | |
| April | 50°F (10°C) | 3.7 in | |
| May | 61°F (16°C) | 4.1 in | |
| June | 70°F (21°C) | 4.4 in | Wettest |
| July | 76°F (24°C) | 4.2 in | Warmest |
| August | 72°F (22°C) | 4.3 in | |
| September | 64°F (18°C) | 3.6 in | |
| October | 53°F (11°C) | 2.8 in | |
| November | 38°F (4°C) | 2.5 in | |
| December | 26°F (-3°C) | 2.0 in |
Joslin has a seasonal temperature swing of 53°F / from 22°F in January to 76°F in July. Total annual precipitation is 36.8 inches, with June being the wettest month (4.4") and February the driest (1.3").