New Castle, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Castle, a city in Henry County, Kentucky.
Tonight
67°F
Chance Showers And Thunderstorms then Partly Cloudy
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 67. Northeast wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for New Castle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 67°F | Chance Showers And Thunderstorms then Partly Cloudy | 7 mph NE | 31% |
| Saturday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph S | 24% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 2 to 6 mph S | 35% |
| Sunday | 90°F | Slight Chance Rain Showers then Mostly Sunny | 8 mph SW | 17% |
| Sunday Night | 67°F | Mostly Cloudy then Chance Rain Showers | 7 mph N | 26% |
| Monday | 82°F | Chance Rain Showers then Chance Showers And Thunderstorms | 8 mph NE | 45% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 10 mph NE | 51% |
| Tuesday | 75°F | Chance Rain Showers then Chance Showers And Thunderstorms | 8 mph NE | 47% |
| Tuesday Night | 59°F | Chance Showers And Thunderstorms | 5 to 9 mph NE | 47% |
| Wednesday | 72°F | Chance Rain Showers | 7 mph N | 30% |
| Wednesday Night | 57°F | Slight Chance Rain Showers then Mostly Cloudy | 7 mph N | 17% |
| Thursday | 72°F | Partly Sunny | 7 mph N | 9% |
| Thursday Night | 57°F | Mostly Cloudy | 7 mph N | 9% |
| Friday | 72°F | Mostly Sunny | 5 to 8 mph N | 4% |
Forecast source: National Weather Service (api.weather.gov) for New Castle (38.434, -85.169). Updated through the day.
Growing snapshot for New Castle
Last spring frost
Apr 12
First fall frost
Oct 25
Growing season
193 days
Hardiness zone
6b
More local growing data for New Castle: nearby ZIP 40058 weather · frost dates · planting calendar · Kentucky frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Crestwood 4Ne, Ky (14.3 mi from New Castle). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.