Grantsburg, IN Weather & Growing Conditions
Tonight
44°F
Slight Chance Drizzle
A slight chance of drizzle before 1am. Mostly cloudy, with a low around 44. West wind 1 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 44°F | Slight Chance Drizzle | 1 to 5 mph W | 1% |
| Thursday | 66°F | Sunny | 2 to 8 mph SW | 0% |
| Thursday Night | 40°F | Partly Cloudy | 0 to 3 mph W | 0% |
| Friday | 59°F | Partly Sunny | 0 to 7 mph NW | 0% |
| Friday Night | 32°F | Partly Cloudy | 2 to 6 mph N | 0% |
| Saturday | 56°F | Sunny | 1 to 5 mph N | 0% |
| Saturday Night | 29°F | Mostly Clear | 2 mph N | 0% |
| Sunday | 59°F | Sunny | 0 to 5 mph NW | 0% |
| Sunday Night | 30°F | Mostly Clear | 2 mph NW | 0% |
| Monday | 63°F | Sunny | 0 to 3 mph S | 0% |
| Monday Night | 32°F | Clear | 2 mph SW | 0% |
| Tuesday | 64°F | Sunny | 1 to 5 mph SW | 1% |
| Tuesday Night | 34°F | Mostly Clear | 2 mph NW | 2% |
| Veterans Day | 65°F | Sunny | 0 to 3 mph N | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grantsburg, IN
Last spring frost
Apr 17
First fall frost
Oct 19
Growing season
184 days
Hardiness zone
6b
Explore more for Grantsburg, IN: full frost dates · planting calendar · Indiana frost dates
Climate data from the nearest NOAA station, English, In (3.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.