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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

WhenTempForecastWindPrecip
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

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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.