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Letts, IN Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Letts, a community in Decatur County, Indiana.

Tonight
66°F
Isolated Rain Showers then Partly Cloudy
Isolated rain showers before 10pm. Partly cloudy. Low around 66, with temperatures rising to around 68 overnight. East wind around 7 mph. Chance of precipitation is 20%.

7-day forecast for Letts

WhenTempForecastWindPrecip
Tonight 66°F Isolated Rain Showers then Partly Cloudy 7 mph E 17%
Saturday 88°F Partly Sunny then Scattered Showers And Thunderstorms 7 mph SSE 43%
Saturday Night 70°F Scattered Showers And Thunderstorms 6 mph SSE 41%
Sunday 88°F Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms 5 mph WSW 30%
Sunday Night 64°F Chance Showers And Thunderstorms 7 mph NNE 42%
Monday 77°F Showers And Thunderstorms Likely 9 mph NE 56%
Monday Night 59°F Chance Showers And Thunderstorms 6 to 10 mph NE 52%
Tuesday 72°F Chance Showers And Thunderstorms 8 mph NE 46%
Tuesday Night 58°F Chance Showers And Thunderstorms 3 to 10 mph NNE 42%
Wednesday 71°F Mostly Cloudy 3 to 7 mph N 13%
Wednesday Night 57°F Mostly Cloudy 2 to 7 mph N 11%
Thursday 72°F Partly Sunny 3 to 7 mph N 6%
Thursday Night 57°F Mostly Cloudy 2 to 7 mph NNE 6%
Friday 72°F Mostly Sunny 3 to 7 mph NNE 6%

Forecast source: National Weather Service (api.weather.gov) for Letts (39.234, -85.569). Updated through the day.

Growing snapshot for Letts

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

More local growing data for Letts: nearby ZIP 47283 weather · frost dates · planting calendar · Indiana frost dates

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Climate data from the nearest NOAA station, N Vernon 2 Ese, In (11.6 mi from Letts). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.