New Castle, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Castle, a city in Henry County, Kentucky.
This Afternoon
78°F
Sunny
Sunny, with a high near 78. South wind around 10 mph.
7-day forecast for New Castle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 10 mph S | 2% |
| Tonight | 61°F | Mostly Cloudy then Showers And Thunderstorms | 8 to 14 mph S | 95% |
| Wednesday | 69°F | Showers And Thunderstorms | 8 to 15 mph S | 100% |
| Wednesday Night | 50°F | Mostly Cloudy | 7 mph SW | 4% |
| Thursday | 67°F | Mostly Sunny | 5 to 9 mph SW | 0% |
| Thursday Night | 45°F | Partly Cloudy | 5 mph W | 0% |
| Friday | 63°F | Partly Sunny | 2 to 7 mph W | 8% |
| Friday Night | 41°F | Mostly Cloudy | 6 mph NW | 11% |
| Saturday | 57°F | Mostly Sunny | 6 mph N | 6% |
| Saturday Night | 36°F | Partly Cloudy | 3 mph NW | 3% |
| Sunday | 59°F | Mostly Sunny | 2 to 7 mph W | 6% |
| Sunday Night | 34°F | Mostly Clear then Slight Chance Rain Showers | 6 mph W | 15% |
| Monday | 62°F | Slight Chance Rain Showers then Sunny | 5 to 8 mph W | 15% |
| Monday Night | 37°F | Mostly Clear | 6 mph SW | 6% |
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 Nov 4, 2026.