Radnor, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Radnor, a community in Delaware County, Ohio.
Today
83°F
Sunny
Sunny, with a high near 83. East wind around 3 mph.
7-day forecast for Radnor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Sunny | 3 mph E | 0% |
| Tonight | 62°F | Mostly Clear | 2 mph NE | 1% |
| Wednesday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 5 mph SE | 29% |
| Wednesday Night | 66°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 20% |
| Thursday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 9 mph SW | 51% |
| Thursday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 to 8 mph SW | 69% |
| Friday | 84°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 to 9 mph SW | 69% |
| Friday Night | 66°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 7 mph SW | 67% |
| Saturday | 84°F | Chance Showers And Thunderstorms | 5 to 8 mph SW | 30% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 30% |
| Sunday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 12 mph SW | 20% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 7 to 10 mph SW | 29% |
| Monday | 87°F | Chance Rain Showers | 8 to 13 mph SW | 36% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 7 to 10 mph SW | 41% |
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 Aug 4, 2026.