Alton, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alton, a town in Crawford County, Indiana.
Tonight
49°F
Slight Chance Drizzle then Mostly Cloudy
A slight chance of drizzle before 11pm. Mostly cloudy, with a low around 49. West wind 1 to 5 mph. Chance of precipitation is 20%.
7-day forecast for Alton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Slight Chance Drizzle then Mostly Cloudy | 1 to 5 mph W | 20% |
| Thursday | 67°F | Sunny | 2 to 8 mph SW | 0% |
| Thursday Night | 39°F | Partly Cloudy | 0 to 3 mph W | 0% |
| Friday | 61°F | Partly Sunny | 0 to 8 mph NW | 0% |
| Friday Night | 31°F | Partly Cloudy | 1 to 7 mph N | 0% |
| Saturday | 57°F | Sunny | 1 to 5 mph N | 0% |
| Saturday Night | 28°F | Mostly Clear | 0 to 3 mph N | 0% |
| Sunday | 59°F | Sunny | 0 to 5 mph NW | 0% |
| Sunday Night | 29°F | Mostly Clear | 0 to 3 mph NW | 0% |
| Monday | 64°F | Sunny | 0 to 3 mph SW | 0% |
| Monday Night | 31°F | Clear | 2 mph SW | 0% |
| Tuesday | 65°F | Sunny | 1 to 5 mph SW | 0% |
| Tuesday Night | 33°F | Mostly Clear | 2 mph NW | 1% |
| Veterans Day | 66°F | Sunny | 0 to 3 mph N | 2% |
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 Nov 5, 2026.