New Castle, KY Weather & Growing Conditions
Tonight
61°F
Mostly Cloudy then Showers And Thunderstorms
Rain showers likely between midnight and 4am, then showers and thunderstorms. Mostly cloudy, with a low around 61. South wind 9 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Mostly Cloudy then Showers And Thunderstorms | 9 to 15 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% |
| Tuesday | 65°F | Sunny | 8 mph SW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for New Castle, KY
Last spring frost
Apr 12
First fall frost
Oct 25
Growing season
193 days
Hardiness zone
6b
Explore more for New Castle, KY: full frost dates · planting calendar · Kentucky frost dates
Climate data from the nearest NOAA station, Crestwood 4Ne, Ky (14.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.