Marseilles, IL Weather & Growing Conditions
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South southwest wind around 5 mph, with gusts as high as 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 mph SSW | 1% |
| Tonight | 68°F | Mostly Cloudy | 5 mph S | 12% |
| Wednesday | 81°F | Slight Chance Showers And Thunderstorms | 5 mph WSW | 57% |
| Wednesday Night | 67°F | Showers And Thunderstorms | 0 to 5 mph NW | 89% |
| Thursday | 80°F | Chance Showers And Thunderstorms | 0 to 5 mph ESE | 70% |
| Thursday Night | 64°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 26% |
| Friday | 83°F | Mostly Sunny | 0 to 5 mph S | 6% |
| Friday Night | 66°F | Mostly Clear | 0 mph | 8% |
| Saturday | 85°F | Mostly Sunny | 0 to 5 mph SSW | 11% |
| Saturday Night | 71°F | Mostly Clear | 5 mph SSW | 12% |
| Sunday | 87°F | Mostly Sunny | 5 to 10 mph SW | 12% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 29% |
| Monday | 87°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 29% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 10 mph WSW | 38% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marseilles, IL
Last spring frost
Apr 27
First fall frost
Oct 17
Growing season
171 days
Hardiness zone
5b
Explore more for Marseilles, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Marseilles Lock, Il (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.