Alton, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alton, a town in Crawford County, Indiana.
Tonight
68°F
Slight Chance Showers And Thunderstorms then Patchy Fog
A slight chance of showers and thunderstorms before 10pm, then patchy fog. Partly cloudy, with a low around 68. Northeast wind around 3 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Alton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 68°F | Slight Chance Showers And Thunderstorms then Patchy Fog | 3 mph NE | 19% |
| Saturday | 94°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 3 mph S | 16% |
| Saturday Night | 71°F | Mostly Clear | 2 mph S | 5% |
| Sunday | 95°F | Mostly Sunny | 2 to 6 mph SW | 6% |
| Sunday Night | 67°F | Partly Cloudy | 5 mph N | 12% |
| Monday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph NE | 43% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 6 to 9 mph NE | 43% |
| Tuesday | 78°F | Chance Rain Showers | 7 mph NE | 36% |
| Tuesday Night | 57°F | Chance Showers And Thunderstorms then Mostly Cloudy | 3 to 8 mph N | 36% |
| Wednesday | 75°F | Partly Sunny | 6 mph N | 12% |
| Wednesday Night | 56°F | Partly Cloudy | 2 to 6 mph N | 10% |
| Thursday | 76°F | Mostly Sunny | 2 to 6 mph N | 7% |
| Thursday Night | 56°F | Partly Cloudy | 2 to 6 mph N | 7% |
| Friday | 76°F | Mostly Sunny | 3 to 7 mph NE | 4% |
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 Sep 19, 2026.