New Castle, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Castle, a city in Henry County, Indiana.
This Afternoon
82°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Partly sunny, with a high near 82. West southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for New Castle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 82°F | Showers And Thunderstorms Likely | 5 mph WSW | 57% |
| Tonight | 68°F | Chance Showers And Thunderstorms | 5 mph S | 43% |
| Sunday | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 6 mph WNW | 34% |
| Sunday Night | 58°F | Chance Showers And Thunderstorms | 7 to 10 mph NE | 63% |
| Monday | 69°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 10 mph NE | 56% |
| Monday Night | 54°F | Chance Showers And Thunderstorms | 8 to 12 mph NE | 46% |
| Tuesday | 69°F | Chance Showers And Thunderstorms | 10 mph NE | 30% |
| Tuesday Night | 55°F | Chance Showers And Thunderstorms | 5 to 12 mph NE | 30% |
| Wednesday | 69°F | Chance Showers And Thunderstorms | 7 mph NNE | 42% |
| Wednesday Night | 54°F | Chance Showers And Thunderstorms | 3 to 7 mph NNE | 42% |
| Thursday | 70°F | Mostly Cloudy | 7 mph NE | 12% |
| Thursday Night | 53°F | Mostly Cloudy | 2 to 7 mph NE | 7% |
| Friday | 72°F | Partly Sunny | 3 to 8 mph NNE | 6% |
| Friday Night | 51°F | Partly Cloudy | 2 to 7 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for New Castle (39.920, -85.370). Updated through the day.
Growing snapshot for New Castle
Last spring frost
Apr 27
First fall frost
Oct 17
Growing season
173 days
Hardiness zone
6a
More local growing data for New Castle: nearby ZIP 47362 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Cadiz
Dunreith
Greensboro
Kennard
Knightstown
Lewisville
Middletown
Millville
Mooreland
Mount Summit
New Lisbon
Shirley
Spiceland
Springport
Straughn
Sulphur Springs
Westwood
Climate data from the nearest NOAA station, New Castle 3 Sw, In (3 mi from New Castle). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.