Greencastle, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greencastle, a city in Putnam County, Indiana.
Today
88°F
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 11am and noon, then a chance of showers and thunderstorms between noon and 5pm, then a slight chance of showers and thunderstorms. Partly sunny. High near 88, with temperatures falling to around 85 in the afternoon. South southwest wind around 7 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Greencastle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 7 mph SSW | 52% |
| Tonight | 69°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 5 mph SSE | 20% |
| Sunday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 8 mph WNW | 34% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely | 12 mph NE | 56% |
| Monday | 70°F | Showers And Thunderstorms Likely | 13 mph ENE | 68% |
| Monday Night | 55°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 68% |
| Tuesday | 68°F | Chance Showers And Thunderstorms | 12 mph NE | 38% |
| Tuesday Night | 54°F | Chance Showers And Thunderstorms | 6 to 13 mph NNE | 33% |
| Wednesday | 69°F | Partly Sunny | 6 to 9 mph NNE | 11% |
| Wednesday Night | 55°F | Mostly Cloudy | 3 to 9 mph NNE | 7% |
| Thursday | 71°F | Partly Sunny | 5 to 9 mph N | 4% |
| Thursday Night | 55°F | Partly Cloudy | 3 to 9 mph NNE | 4% |
| Friday | 73°F | Mostly Sunny | 3 to 9 mph NNE | 1% |
| Friday Night | 54°F | Partly Cloudy | 3 to 9 mph NE | 1% |
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.