Grantsburg, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grantsburg, a community in Crawford County, Indiana.
Today
85°F
Sunny
Sunny, with a high near 85. Northeast wind around 2 mph.
7-day forecast for Grantsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 2 mph NE | 0% |
| Tonight | 64°F | Mostly Clear | 1 mph NE | 0% |
| Wednesday | 88°F | Sunny | 1 mph NW | 2% |
| Wednesday Night | 67°F | Mostly Clear | 1 mph W | 2% |
| Thursday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 15% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms | 2 mph S | 42% |
| Friday | 86°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 44% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 2 mph SW | 44% |
| Saturday | 86°F | Chance Showers And Thunderstorms | 0 to 3 mph SW | 35% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 mph SW | 27% |
| Sunday | 88°F | Mostly Sunny | 1 to 5 mph SW | 13% |
| Sunday Night | 71°F | Mostly Clear | 2 mph SW | 13% |
| Monday | 89°F | Sunny | 1 to 5 mph SW | 11% |
| Monday Night | 72°F | Partly Cloudy then Slight Chance Rain Showers | 3 mph SW | 19% |
Forecast source: National Weather Service (api.weather.gov) for Grantsburg (38.291, -86.471). Updated through the day.
Growing snapshot for Grantsburg
Last spring frost
Apr 17
First fall frost
Oct 19
Growing season
184 days
Hardiness zone
6b
More local growing data for Grantsburg: nearby ZIP 47123 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, English, In (0.5 mi from Grantsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.