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Union, OH
Full City Profile · Ohio · Montgomery County County
3.5
/5.0
B+
Good
6,930
Population
830/sq mi density
$68,837
Median Income
$34,055 per capita
$138,800
Home Value
$204,442 Zillow
$1,106
Median Rent
26.6% income on rent
54°F
Avg Temperature
293 sunny days/yr
47
Violent Crime/100K
0 property/100K
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.3 / 5.0
$68,837 median income, 1.8% unemployment
A+
Affordability
5.0 / 5.0
$138,800 home value, $1,106/mo rent
C
Safety
2.0 / 5.0
47 violent crimes/100K
C+
Education
2.7 / 5.0
21.0% bachelor's degree or higher
Union experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 29°F in January while summers reach 76°F in July. The area gets 293 sunny days per year. Annual precipitation totals 41.3 inches. The area receives 25.0 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
29°F Jan (-1°C)
76°F Jul (24°C)
| Annual Average | 53.9°F |
| 0% below US avg | |
| January Average | 29°F (-1°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 790 ft (241 m) |
| Area | 8.4 sq mi (21.6 km²) |
| Population Density | 830/sq mi |
| Coordinates | 39.9066°N, 84.2933°W |
| Timezone | America/New_York |
| County | Montgomery County County |
| Nearest Airport | James M Cox Dayton International (DAY) 4 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0483 ppm |
| PM2.5 (Fine Particles) | 9.9 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 92.7 / 100 |
| Social Vulnerability | 46.5 / 100 |
| Community Resilience | 78.3 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively High |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Very High |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-1°C) | 2.3 in | Coldest |
| February | 30°F (-1°C) | 2.2 in | Driest |
| March | 40°F (5°C) | 3.3 in | |
| April | 51°F (10°C) | 3.9 in | |
| May | 61°F (16°C) | 4.2 in | Wettest |
| June | 70°F (21°C) | 3.8 in | |
| July | 76°F (24°C) | 3.9 in | Warmest |
| August | 72°F (22°C) | 3.4 in | |
| September | 65°F (19°C) | 2.7 in | |
| October | 54°F (12°C) | 2.7 in | |
| November | 42°F (6°C) | 3.2 in | |
| December | 32°F (-0°C) | 2.9 in |
Union has a seasonal temperature swing of 47°F / from 29°F in January to 76°F in July. Total annual precipitation is 38.5 inches, with May being the wettest month (4.2") and February the driest (2.2").