Union Mills, IN
Full City Profile · Indiana · LaPorte County County
4.1
/5.0
A
Great
159
Population
261/sq mi density
$99,219
Median Income
$54,251 per capita
$206,300
Home Value
$261,610 Zillow
52°F
Avg Temperature
A
Overall
4.1 / 5.0
Strong
A+
Economy
5.0 / 5.0
$99,219 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$206,300 home value, /mo rent
C
Education
2.4 / 5.0
17.6% bachelor's degree or higher
Union Mills experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 26°F in January while summers reach 75°F in July. Annual precipitation totals 38.9 inches. The area receives 41.7 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
26°F Jan (-3°C)
75°F Jul (24°C)
| Annual Average | 51.8°F |
| 4% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 747 ft (228 m) |
| Area | 0.6 sq mi (1.6 km²) |
| Population Density | 261/sq mi |
| Coordinates | 41.4953°N, 86.7839°W |
| Timezone | America/Indiana/Indianapolis |
| County | LaPorte County County |
| Nearest Airport | Porter County Regional (VPZ) 12 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
| Good Days % | 70.2% |
| Unhealthy Days | 2 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0455 ppm |
| PM2.5 (Fine Particles) | 8.7 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 78.9 / 100 |
| Social Vulnerability | 48.7 / 100 |
| Community Resilience | 82.6 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Relatively 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 | 24 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 2.5 in | Coldest |
| February | 30°F (-1°C) | 2.0 in | Driest |
| March | 40°F (4°C) | 2.5 in | |
| April | 51°F (11°C) | 3.5 in | |
| May | 62°F (17°C) | 3.9 in | |
| June | 71°F (22°C) | 4.0 in | |
| July | 75°F (24°C) | 4.2 in | Warmest, Wettest |
| August | 73°F (23°C) | 3.7 in | |
| September | 66°F (19°C) | 3.4 in | |
| October | 55°F (13°C) | 4.0 in | |
| November | 42°F (6°C) | 2.8 in | |
| December | 32°F (-0°C) | 2.5 in |
Union Mills has a seasonal temperature swing of 48°F / from 26°F in January to 75°F in July. Total annual precipitation is 38.9 inches, with July being the wettest month (4.2") and February the driest (2.0").