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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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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St. Omer
St. Paul
Westport
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.