Letts, IN Weather & Growing Conditions

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

Overnight

66°F

Mostly Cloudy

Mostly cloudy. Low around 66, with temperatures rising to around 69 overnight. East southeast wind around 7 mph.

7-day forecast for Letts

When	Temp	Forecast	Wind	Precip
Overnight	66°F	Mostly Cloudy	7 mph ESE	2%
Saturday	89°F	Partly Sunny then Chance Showers And Thunderstorms	6 mph SSE	58%
Saturday Night	69°F	Chance Showers And Thunderstorms then Mostly Cloudy	3 mph SSE	46%
Sunday	87°F	Mostly Sunny 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

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

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Adams Andersonville Burney Clarksburg Greensburg Lake Santee Milford Millhousen New Point Sardinia St. Omer St. Paul Westport

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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.