Grantsburg, IN Weather & Growing Conditions
Today
85°F
Sunny
Sunny, with a high near 85. Northeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 2 mph NE | 0% |
| Tonight | 64°F | Mostly Clear | 2 mph N | 0% |
| Wednesday | 88°F | Sunny | 2 mph NW | 2% |
| Wednesday Night | 67°F | Mostly Clear | 1 mph W | 2% |
| Thursday | 87°F | Mostly Sunny | 0 to 5 mph SW | 14% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms | 2 mph S | 41% |
| Friday | 85°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 43% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 2 mph SW | 43% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 0 to 3 mph SW | 37% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 mph SW | 28% |
| Sunday | 87°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 6 mph SW | 11% |
| Monday Night | 72°F | Partly Cloudy then Slight Chance Rain Showers | 3 mph SW | 18% |
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 Aug 4, 2026.