Grantsburg, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grantsburg, a community in Crawford County, Indiana.
This Afternoon
71°F
Slight Chance Drizzle
A slight chance of drizzle after 5pm. Mostly cloudy, with a high near 71. West wind 6 to 9 mph.
7-day forecast for Grantsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Slight Chance Drizzle | 6 to 9 mph W | 10% |
| Tonight | 44°F | Slight Chance Drizzle | 1 to 5 mph W | 1% |
| Thursday | 66°F | Sunny | 2 to 7 mph SW | 0% |
| Thursday Night | 40°F | Partly Cloudy | 2 mph W | 0% |
| Friday | 59°F | Partly Sunny | 0 to 6 mph NW | 0% |
| Friday Night | 31°F | Partly Cloudy | 1 to 5 mph N | 0% |
| Saturday | 56°F | Sunny | 3 mph N | 0% |
| Saturday Night | 29°F | Mostly Clear | 2 mph N | 0% |
| Sunday | 59°F | Sunny | 0 to 3 mph NW | 0% |
| Sunday Night | 30°F | Mostly Clear | 2 mph NW | 0% |
| Monday | 63°F | Sunny | 2 mph SW | 0% |
| Monday Night | 32°F | Clear | 1 mph SW | 0% |
| Tuesday | 64°F | Sunny | 3 mph SW | 1% |
| Tuesday Night | 34°F | Mostly Clear | 1 mph NW | 2% |
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 Nov 4, 2026.