Radnor, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Radnor, a community in Delaware County, Ohio.
This Afternoon
75°F
Sunny
Sunny, with a high near 75. South wind around 13 mph.
7-day forecast for Radnor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 13 mph S | 1% |
| Tonight | 60°F | Partly Cloudy | 10 to 15 mph SE | 13% |
| Wednesday | 66°F | Showers And Thunderstorms | 17 mph S | 98% |
| Wednesday Night | 51°F | Showers And Thunderstorms then Mostly Cloudy | 7 to 17 mph SW | 82% |
| Thursday | 64°F | Mostly Sunny | 7 to 14 mph SW | 0% |
| Thursday Night | 45°F | Partly Cloudy | 2 to 8 mph SW | 2% |
| Friday | 59°F | Partly Sunny then Slight Chance Light Rain | 2 to 8 mph W | 17% |
| Friday Night | 39°F | Slight Chance Light Rain then Mostly Cloudy | 8 mph NW | 17% |
| Saturday | 54°F | Partly Sunny | 9 mph NW | 13% |
| Saturday Night | 34°F | Mostly Cloudy | 2 to 6 mph W | 4% |
| Sunday | 55°F | Mostly Sunny | 3 to 10 mph W | 10% |
| Sunday Night | 34°F | Partly Cloudy | 5 to 8 mph W | 14% |
| Monday | 57°F | Mostly Sunny | 5 to 10 mph W | 14% |
| Monday Night | 37°F | Partly Cloudy | 9 mph SW | 13% |
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 Nov 3, 2026.