Radnor, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Radnor, a community in Delaware County, Ohio.
Overnight
55°F
Patchy Fog
Patchy fog after 5am. Partly cloudy, with a low around 55. Northeast wind around 6 mph.
7-day forecast for Radnor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Patchy Fog | 6 mph NE | 2% |
| Saturday | 78°F | Patchy Fog then Chance Showers And Thunderstorms | 6 mph SE | 31% |
| Saturday Night | 64°F | Showers And Thunderstorms Likely | 6 mph S | 60% |
| Sunday | 77°F | Showers And Thunderstorms | 6 to 12 mph W | 88% |
| Sunday Night | 58°F | Showers And Thunderstorms | 9 to 13 mph NE | 79% |
| Monday | 70°F | Chance Rain Showers | 10 to 14 mph NE | 49% |
| Monday Night | 55°F | Chance Rain Showers | 14 mph NE | 46% |
| Tuesday | 70°F | Chance Rain Showers | 13 mph NE | 46% |
| Tuesday Night | 57°F | Chance Rain Showers | 14 mph NE | 52% |
| Wednesday | 69°F | Chance Rain Showers | 13 mph NE | 52% |
| Wednesday Night | 55°F | Chance Rain Showers | 10 mph NE | 40% |
| Thursday | 70°F | Slight Chance Rain Showers | 10 mph NE | 18% |
| Thursday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 10 mph N | 16% |
| Friday | 70°F | Mostly Sunny | 7 to 10 mph N | 12% |
Forecast source: National Weather Service (api.weather.gov) for Radnor (40.385, -83.146). Updated through the day.
Growing snapshot for Radnor
Last spring frost
Apr 25
First fall frost
Oct 20
Growing season
178 days
Hardiness zone
6b
More local growing data for Radnor: nearby ZIP 43066 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Marion 2 N, Oh (14.9 mi from Radnor). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.