Greencastle, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greencastle, a city in Putnam County, Indiana.
This Afternoon
68°F
Slight Chance Light Rain
A slight chance of rain. Mostly cloudy. High near 68, with temperatures falling to around 62 in the afternoon. West southwest wind around 12 mph, with gusts as high as 18 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Greencastle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Slight Chance Light Rain | 12 mph WSW | 15% |
| Tonight | 47°F | Mostly Cloudy | 5 to 10 mph SW | 5% |
| Thursday | 61°F | Partly Sunny | 7 to 14 mph SW | 1% |
| Thursday Night | 43°F | Mostly Cloudy | 2 to 7 mph W | 13% |
| Friday | 52°F | Mostly Cloudy | 6 to 10 mph NNW | 7% |
| Friday Night | 33°F | Partly Cloudy | 3 to 9 mph NNW | 3% |
| Saturday | 52°F | Sunny | 3 to 7 mph NW | 0% |
| Saturday Night | 30°F | Mostly Clear | 0 to 3 mph NW | 0% |
| Sunday | 56°F | Sunny | 1 to 7 mph W | 0% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Monday | 60°F | Sunny | 0 to 7 mph WNW | 0% |
| Monday Night | 37°F | Clear | 6 mph SW | 0% |
| Tuesday | 63°F | Sunny | 2 to 6 mph W | 2% |
| Tuesday Night | 37°F | Mostly Clear | 0 to 3 mph NNW | 2% |
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 Nov 5, 2026.