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Radnor, OH
Full City Profile · Ohio · Delaware County County
3.6
/5.0
B+
Good
188
Population
261/sq mi density
$70,245
Median Income
$39,927 per capita
$179,900
Home Value
$392,650 Zillow
52°F
Avg Temperature
275 sunny days/yr
174
Violent Crime/100K
2,163 property/100K
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.4 / 5.0
$70,245 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$179,900 home value, /mo rent
F
Safety
1.0 / 5.0
174 violent crimes/100K
B+
Education
4.0 / 5.0
37.1% bachelor's degree or higher
Radnor experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 28°F in January while summers reach 75°F in July. The area gets 275 sunny days per year. Annual precipitation totals 40.5 inches. The area receives 24.0 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
28°F Jan (-2°C)
75°F Jul (24°C)
| Annual Average | 52.4°F |
| 3% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 937 ft (286 m) |
| Area | 0.7 sq mi (1.9 km²) |
| Population Density | 261/sq mi |
| Coordinates | 40.3852°N, 83.1459°W |
| Timezone | America/New_York |
| County | Delaware County County |
| Nearest Airport | John Glenn Columbus International (CMH) 30 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0445 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 78.8 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 95.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| 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 High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Very 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 | 28°F (-2°C) | 2.2 in | Coldest |
| February | 28°F (-2°C) | 1.9 in | Driest |
| March | 38°F (4°C) | 2.8 in | |
| April | 49°F (9°C) | 3.5 in | |
| May | 60°F (15°C) | 4.1 in | Wettest |
| June | 68°F (20°C) | 4.0 in | |
| July | 75°F (24°C) | 4.1 in | Warmest |
| August | 71°F (22°C) | 3.5 in | |
| September | 65°F (18°C) | 3.0 in | |
| October | 53°F (12°C) | 2.5 in | |
| November | 42°F (5°C) | 3.1 in | |
| December | 31°F (-0°C) | 2.8 in |
Radnor has a seasonal temperature swing of 47°F / from 28°F in January to 75°F in July. Total annual precipitation is 37.3 inches, with May being the wettest month (4.1") and February the driest (1.9").