Grand Tower, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grand Tower, a city in Jackson County, Illinois.
Tonight
54°F
Showers And Thunderstorms
Showers and thunderstorms before 1am. Mostly cloudy. Low around 54, with temperatures rising to around 58 overnight. South southwest wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
7-day forecast for Grand Tower
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Showers And Thunderstorms | 6 to 13 mph SSW | 88% |
| Wednesday | 68°F | Partly Sunny | 3 to 8 mph WSW | 4% |
| Wednesday Night | 40°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 69°F | Sunny | 2 to 6 mph SW | 0% |
| Thursday Night | 42°F | Partly Cloudy | 3 mph WNW | 6% |
| Friday | 61°F | Partly Sunny | 3 to 9 mph NNW | 2% |
| Friday Night | 37°F | Partly Cloudy | 5 mph NNW | 0% |
| Saturday | 58°F | Partly Sunny | 5 mph NNW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 1 mph NW | 2% |
| Sunday | 64°F | Sunny | 1 to 6 mph WNW | 5% |
| Sunday Night | 33°F | Mostly Clear | 2 mph NNW | 5% |
| Monday | 66°F | Sunny | 1 to 7 mph W | 2% |
| Monday Night | 36°F | Mostly Clear | 3 mph SW | 0% |
| Tuesday | 70°F | Sunny | 5 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Grand Tower (37.642, -89.507). Updated through the day.
Growing snapshot for Grand Tower
Last spring frost
Apr 9
First fall frost
Oct 22
Growing season
195 days
Hardiness zone
7a
More local growing data for Grand Tower: nearby ZIP 62942 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Ava
Campbell Hill
Carbondale
De Soto
Dowell
Elkville
Gorham
Harrison
Makanda
Murphysboro
Rockwood
Vergennes
Climate data from the nearest NOAA station, Carbondale Southern Il Ap, Il (15.8 mi from Grand Tower). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.