Northfield, IL
Full City Profile · Illinois · Lake County County
3.8
/5.0
B+
Good
5,683
Population
1,759/sq mi density
$180,492
Median Income
$116,824 per capita
$807,700
Home Value
$896,262 Zillow
$2,917
Median Rent
31.2% income on rent
51°F
Avg Temperature
18
Violent Crime/100K
767 property/100K
B+
Overall
3.8 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$180,492 median income, 2.0% unemployment
A
Affordability
4.2 / 5.0
$807,700 home value, $2,917/mo rent
F
Safety
1.0 / 5.0
18 violent crimes/100K
A+
Education
5.0 / 5.0
81.7% bachelor's degree or higher
Northfield experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 25°F in January while summers reach 75°F in July. Annual precipitation totals 32.3 inches. The area receives 33.6 inches of snow annually. Air quality is rated Good with a median AQI of 40.
Temperature
25°F Jan (-4°C)
75°F Jul (24°C)
| Annual Average | 50.8°F |
| 6% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 623 ft (190 m) |
| Area | 3.2 sq mi (8.3 km²) |
| Population Density | 1,759/sq mi |
| Coordinates | 42.1030°N, 87.7774°W |
| Timezone | America/Chicago |
| County | Lake County County |
| Nearest Airport | Chicago O'Hare International (ORD) 11 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
| Good Days % | 82.0% |
| Unhealthy Days | 5 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0480 ppm |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 96.0 / 100 |
| Social Vulnerability | 14.1 / 100 |
| Community Resilience | 78.1 / 100 |
Hazard Breakdown
| Tornado | Very High |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Moderate |
| Strong Wind | Very High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Very High |
| Landslide | Very Low |
| Coastal Flood | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.0 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1954 | MICHIGAN CITY, IN (LAKE MICHIGAN) | Avalanche | 3.0 m | 7 | 87 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 1.3 in | Coldest |
| February | 29°F (-2°C) | 1.3 in | Driest |
| March | 38°F (4°C) | 1.8 in | |
| April | 49°F (9°C) | 3.3 in | |
| May | 60°F (15°C) | 3.8 in | |
| June | 70°F (21°C) | 4.0 in | Wettest |
| July | 75°F (24°C) | 3.2 in | Warmest |
| August | 73°F (23°C) | 3.7 in | |
| September | 66°F (19°C) | 3.0 in | |
| October | 54°F (12°C) | 3.1 in | |
| November | 41°F (5°C) | 2.2 in | |
| December | 30°F (-1°C) | 1.6 in |
Northfield has a seasonal temperature swing of 50°F / from 25°F in January to 75°F in July. Total annual precipitation is 32.3 inches, with June being the wettest month (4.0") and February the driest (1.3").