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Seymour, IN Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Seymour, a city in Jackson County, Indiana.

Tonight
70°F
Chance Showers And Thunderstorms then Mostly Cloudy
A chance of showers and thunderstorms before 8pm. Mostly cloudy. Low around 70, with temperatures rising to around 72 overnight. South wind around 2 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Seymour

WhenTempForecastWindPrecip
Tonight 70°F Chance Showers And Thunderstorms then Mostly Cloudy 2 mph S 25%
Sunday 91°F Mostly Sunny 3 mph WSW 8%
Sunday Night 65°F Chance Showers And Thunderstorms 5 mph N 53%
Monday 78°F Chance Showers And Thunderstorms 6 mph NE 48%
Monday Night 59°F Chance Showers And Thunderstorms 3 to 7 mph NE 48%
Tuesday 74°F Chance Showers And Thunderstorms 6 mph NE 45%
Tuesday Night 59°F Chance Showers And Thunderstorms 2 to 6 mph NNE 33%
Wednesday 72°F Chance Showers And Thunderstorms 5 mph N 31%
Wednesday Night 58°F Slight Chance Showers And Thunderstorms then Mostly Cloudy 1 to 5 mph N 21%
Thursday 73°F Partly Sunny 3 mph N 8%
Thursday Night 57°F Mostly Cloudy 3 mph NNE 7%
Friday 75°F Partly Sunny 1 to 5 mph NNE 6%
Friday Night 55°F Partly Cloudy 1 to 5 mph NNE 6%
Saturday 76°F Mostly Sunny 3 mph NNE 4%

Forecast source: National Weather Service (api.weather.gov) for Seymour (38.948, -85.891). Updated through the day.

Growing snapshot for Seymour

Last spring frost
Apr 16
First fall frost
Oct 21
Growing season
187 days
Hardiness zone
6b

More local growing data for Seymour: nearby ZIP 47274 weather · frost dates · planting calendar · Indiana frost dates

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Climate data from the nearest NOAA station, Seymour 2 N, In (1.8 mi from Seymour). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.