Alton, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alton, a town in Crawford County, Indiana.
Today
86°F
Sunny
Sunny, with a high near 86. Northeast wind around 3 mph.
7-day forecast for Alton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 3 mph NE | 0% |
| Tonight | 64°F | Mostly Clear | 2 mph N | 0% |
| Wednesday | 90°F | Sunny | 2 mph NW | 3% |
| Wednesday Night | 68°F | Mostly Clear | 2 mph NW | 3% |
| Thursday | 90°F | Mostly Sunny | 0 to 5 mph SW | 12% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 3 mph S | 36% |
| Friday | 88°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 41% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 3 mph SW | 41% |
| Saturday | 88°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 36% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 mph SW | 30% |
| Sunday | 90°F | Mostly Sunny | 1 to 5 mph SW | 13% |
| Sunday Night | 71°F | Partly Cloudy | 5 mph SW | 13% |
| Monday | 91°F | Sunny | 2 to 7 mph SW | 11% |
| Monday Night | 73°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph SW | 17% |
Forecast source: National Weather Service (api.weather.gov) for Alton (38.120, -86.419). Updated through the day.
Growing snapshot for Alton
Last spring frost
Apr 17
First fall frost
Oct 19
Growing season
184 days
Hardiness zone
6b
More local growing data for Alton: nearby ZIP 47137 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, English, In (8.9 mi from Alton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.