Marion, IL Weather & Growing Conditions
This Afternoon
79°F
Partly Sunny
Partly sunny. High near 79, with temperatures falling to around 76 in the afternoon. South wind around 20 mph, with gusts as high as 30 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Partly Sunny | 20 mph S | 11% |
| Tonight | 56°F | Showers And Thunderstorms | 7 to 16 mph S | 99% |
| Wednesday | 69°F | Partly Sunny | 5 to 10 mph WSW | 9% |
| Wednesday Night | 43°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 70°F | Sunny | 2 to 9 mph SW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 2 mph W | 5% |
| Friday | 62°F | Mostly Cloudy | 3 to 9 mph NNW | 4% |
| Friday Night | 39°F | Mostly Cloudy | 2 to 6 mph NNW | 1% |
| Saturday | 58°F | Partly Sunny | 2 to 6 mph NNW | 0% |
| Saturday Night | 34°F | Partly Cloudy | 1 mph NNW | 1% |
| Sunday | 63°F | Sunny | 0 to 7 mph WNW | 6% |
| Sunday Night | 34°F | Mostly Clear | 2 mph NW | 5% |
| Monday | 66°F | Sunny | 1 to 8 mph W | 2% |
| Monday Night | 38°F | Mostly Clear | 5 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marion, IL
Last spring frost
Apr 9
First fall frost
Oct 22
Growing season
195 days
Hardiness zone
7a
Explore more for Marion, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Carbondale Sewage Plt, Il (13.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.