Greencastle, IN Weather & Growing Conditions
Tonight
66°F
Scattered Showers And Thunderstorms
Scattered showers and thunderstorms. Partly cloudy. Low around 66, with temperatures rising to around 68 overnight. East wind around 8 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Scattered Showers And Thunderstorms | 8 mph E | 15% |
| Saturday | 89°F | Isolated Showers And Thunderstorms then Scattered Showers And Thunderstorms | 7 mph S | 37% |
| Saturday Night | 70°F | Scattered Showers And Thunderstorms then Chance Showers And Thunderstorms | 7 mph SSE | 35% |
| Sunday | 87°F | Chance Showers And Thunderstorms | 2 to 7 mph W | 28% |
| Sunday Night | 62°F | Showers And Thunderstorms Likely | 10 mph NE | 57% |
| Monday | 74°F | Showers And Thunderstorms Likely | 12 mph NE | 57% |
| Monday Night | 56°F | Chance Showers And Thunderstorms | 9 to 14 mph NE | 53% |
| Tuesday | 71°F | Chance Showers And Thunderstorms | 12 mph NE | 36% |
| Tuesday Night | 56°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 13 mph NNE | 24% |
| Wednesday | 70°F | Mostly Cloudy | 5 to 9 mph NNE | 5% |
| Wednesday Night | 55°F | Mostly Cloudy | 3 to 9 mph N | 5% |
| Thursday | 73°F | Partly Sunny | 3 to 8 mph N | 4% |
| Thursday Night | 56°F | Mostly Cloudy | 3 to 8 mph NNE | 4% |
| Friday | 73°F | Mostly Sunny | 3 to 9 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Greencastle, IN
Last spring frost
Apr 27
First fall frost
Oct 15
Growing season
169 days
Hardiness zone
6a
Explore more for Greencastle, IN: full frost dates · planting calendar · Indiana frost dates
Climate data from the nearest NOAA station, Greencastle 1 W, In (1.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.