Greencastle, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greencastle, a city in Putnam County, Indiana.
Tonight
66°F
Partly Cloudy then Scattered Rain Showers
Scattered rain showers after 5am. Partly cloudy. Low around 66, with temperatures rising to around 68 overnight. East southeast wind around 8 mph.
7-day forecast for Greencastle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Partly Cloudy then Scattered Rain Showers | 8 mph ESE | 11% |
| Saturday | 88°F | Scattered Rain Showers then Slight Chance Showers And Thunderstorms | 7 mph S | 37% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 7 mph SSE | 36% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 3 to 7 mph W | 28% |
| Sunday Night | 62°F | Showers And Thunderstorms Likely | 10 mph NNE | 57% |
| Monday | 73°F | Showers And Thunderstorms Likely | 12 mph NE | 57% |
| Monday Night | 56°F | Chance Showers And Thunderstorms | 9 to 14 mph NE | 53% |
| Tuesday | 70°F | Chance Showers And Thunderstorms | 12 mph NE | 36% |
| Tuesday Night | 55°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 12 mph NNE | 24% |
| Wednesday | 69°F | Mostly Cloudy | 6 to 9 mph NNE | 5% |
| Wednesday Night | 55°F | Mostly Cloudy | 3 to 9 mph NNE | 5% |
| Thursday | 71°F | Partly Sunny | 3 to 8 mph N | 4% |
| Thursday Night | 56°F | Mostly Cloudy | 3 to 8 mph NNE | 4% |
| Friday | 72°F | Mostly Sunny | 3 to 9 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Greencastle (39.642, -86.846). Updated through the day.
Growing snapshot for Greencastle
Last spring frost
Apr 27
First fall frost
Oct 15
Growing season
169 days
Hardiness zone
6a
More local growing data for Greencastle: nearby ZIP 46135 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Greencastle 1 W, In (1.2 mi from Greencastle). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.