Onton, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Onton, a community in Mclean County, Kentucky.
Overnight
70°F
Partly Cloudy
Partly cloudy. Low around 70, with temperatures rising to around 72 overnight. Southeast wind around 2 mph.
7-day forecast for Onton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Partly Cloudy | 2 mph SE | 2% |
| Saturday | 97°F | Sunny | 2 to 7 mph SW | 5% |
| Saturday Night | 71°F | Mostly Clear | 5 mph SSW | 2% |
| Sunday | 96°F | Sunny | 5 to 8 mph SW | 0% |
| Sunday Night | 69°F | Partly Cloudy | 6 mph NNW | 8% |
| Monday | 89°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 8 mph NE | 38% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 6 to 9 mph NNE | 45% |
| Tuesday | 79°F | Chance Showers And Thunderstorms | 6 to 10 mph NNE | 45% |
| Tuesday Night | 59°F | Partly Cloudy | 5 to 10 mph N | 14% |
| Wednesday | 77°F | Mostly Sunny | 5 to 9 mph N | 12% |
| Wednesday Night | 56°F | Partly Cloudy | 3 to 9 mph N | 3% |
| Thursday | 77°F | Mostly Sunny | 3 to 8 mph N | 3% |
| Thursday Night | 57°F | Partly Cloudy | 3 to 8 mph NNE | 2% |
| Friday | 78°F | Mostly Sunny | 3 to 9 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Onton (37.561, -87.439). Updated through the day.
Growing snapshot for Onton
Last spring frost
Apr 2
First fall frost
Nov 1
Growing season
211 days
Hardiness zone
7a
More local growing data for Onton: nearby ZIP 42322 weather · frost dates · planting calendar · Kentucky frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Calhoun Lock 2, Ky (9 mi from Onton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.