Waterloo, WI
Full City Profile · Wisconsin · Jefferson County County
3.2
/5.0
B
Good
3,542
Population
935/sq mi density
$78,103
Median Income
$37,379 per capita
$219,100
Home Value
$323,279 Zillow
$974
Median Rent
19.4% income on rent
47°F
Avg Temperature
27
Violent Crime/100K
466 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.8 / 5.0
$78,103 median income, 0.6% unemployment
A+
Affordability
5.0 / 5.0
$219,100 home value, $974/mo rent
F
Safety
1.0 / 5.0
27 violent crimes/100K
C+
Education
2.9 / 5.0
23.9% bachelor's degree or higher
Waterloo experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 19°F in January while summers reach 71°F in July. Annual precipitation totals 38.5 inches. The area receives 42.3 inches of snow annually. Air quality is rated Good with a median AQI of 39.
Temperature
19°F Jan (-7°C)
71°F Jul (22°C)
| Annual Average | 46.7°F |
| 14% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 71°F (22°C) |
Geography
| Elevation | 812 ft (247 m) |
| Area | 3.9 sq mi (10.0 km²) |
| Population Density | 935/sq mi |
| Coordinates | 43.1835°N, 88.9900°W |
| Timezone | America/Chicago |
| County | Jefferson County County |
| Nearest Airport | Dane County Regional/Truax Field (MSN) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
| Good Days % | 89.3% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0493 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 75.8 / 100 |
| Social Vulnerability | 19.8 / 100 |
| Community Resilience | 92.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 1.4 in | Coldest, Driest |
| February | 23°F (-5°C) | 1.6 in | |
| March | 34°F (1°C) | 2.0 in | |
| April | 46°F (8°C) | 3.9 in | |
| May | 58°F (14°C) | 4.2 in | |
| June | 68°F (20°C) | 5.6 in | Wettest |
| July | 71°F (22°C) | 4.4 in | Warmest |
| August | 70°F (21°C) | 4.1 in | |
| September | 61°F (16°C) | 3.9 in | |
| October | 50°F (10°C) | 3.0 in | |
| November | 37°F (3°C) | 2.4 in | |
| December | 25°F (-4°C) | 1.8 in |
Waterloo has a seasonal temperature swing of 52°F / from 19°F in January to 71°F in July. Total annual precipitation is 38.5 inches, with June being the wettest month (5.6") and January the driest (1.4").