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LaSalle, IL
Full City Profile · Illinois · Putnam County County
2.9
/5.0
C+
Fair
9,471
Population
702/sq mi density
$54,246
Median Income
$28,390 per capita
$109,500
Home Value
$174,202 Zillow
$1,011
Median Rent
27.6% income on rent
50°F
Avg Temperature
275 sunny days/yr
60
Violent Crime/100K
2,087 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
B
Economy
3.4 / 5.0
$54,246 median income, 3.8% unemployment
A+
Affordability
5.0 / 5.0
$109,500 home value, $1,011/mo rent
F
Safety
1.0 / 5.0
60 violent crimes/100K
C
Education
2.1 / 5.0
13.6% bachelor's degree or higher
LaSalle experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 22°F in January while summers reach 73°F in July. The area gets 275 sunny days per year. Annual precipitation totals 38.1 inches. The area receives 28.5 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
22°F Jan (-6°C)
73°F Jul (23°C)
| Annual Average | 49.6°F |
| 8% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 579 ft (176 m) |
| Area | 5.0 sq mi (13.0 km²) |
| Population Density | 702/sq mi |
| Coordinates | 41.3352°N, 89.0972°W |
| Timezone | America/Chicago |
| County | Putnam County County |
| Nearest Airport | Illinois Valley Regional-Walter A Duncan Field (VYS) 3 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 9.2 / 100 |
| Social Vulnerability | 34.8 / 100 |
| Community Resilience | 79.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| 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) | 1.4 in | Coldest |
| February | 26°F (-4°C) | 1.2 in | Driest |
| March | 37°F (3°C) | 2.6 in | |
| April | 49°F (10°C) | 3.6 in | |
| May | 61°F (16°C) | 3.9 in | |
| June | 70°F (21°C) | 4.2 in | Wettest |
| July | 73°F (23°C) | 3.8 in | Warmest |
| August | 72°F (22°C) | 3.9 in | |
| September | 64°F (18°C) | 3.8 in | |
| October | 53°F (11°C) | 2.6 in | |
| November | 39°F (4°C) | 2.7 in | |
| December | 26°F (-3°C) | 2.1 in |
LaSalle has a seasonal temperature swing of 51°F / from 22°F in January to 73°F in July. Total annual precipitation is 35.7 inches, with June being the wettest month (4.2") and February the driest (1.2").