Grantsburg, IN Weather & Growing Conditions
This Afternoon
93°F
Isolated Showers And Thunderstorms
Isolated showers and thunderstorms. Sunny, with a high near 93. West wind around 3 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 93°F | Isolated Showers And Thunderstorms | 3 mph W | 17% |
| Tonight | 72°F | Isolated Showers And Thunderstorms then Partly Cloudy | 2 mph S | 15% |
| Sunday | 92°F | Mostly Sunny | 5 mph SW | 3% |
| Sunday Night | 66°F | Partly Cloudy then Scattered Showers And Thunderstorms | 3 mph N | 26% |
| Monday | 84°F | Scattered Showers And Thunderstorms then Isolated Showers And Thunderstorms | 5 mph NE | 41% |
| Monday Night | 59°F | Scattered Showers And Thunderstorms | 3 to 7 mph NE | 41% |
| Tuesday | 77°F | Scattered Showers And Thunderstorms | 5 mph NE | 38% |
| Tuesday Night | 57°F | Scattered Showers And Thunderstorms | 2 to 6 mph N | 31% |
| Wednesday | 74°F | Partly Sunny | 5 mph N | 14% |
| Wednesday Night | 55°F | Partly Cloudy | 1 to 5 mph N | 13% |
| Thursday | 74°F | Partly Sunny | 3 mph N | 9% |
| Thursday Night | 55°F | Partly Cloudy | 3 mph N | 9% |
| Friday | 76°F | Partly Sunny | 5 mph N | 4% |
| Friday Night | 53°F | Partly Cloudy | 5 mph N | 4% |
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 Sep 19, 2026.