Grantsburg, IN Weather & Growing Conditions
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
| 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). 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 (1.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.