Marseilles, IL Weather & Growing Conditions
Tonight
66°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 66. East southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 mph ESE | 28% |
| Saturday | 82°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 64% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely | 5 mph NNE | 79% |
| Sunday | 71°F | Showers And Thunderstorms | 5 to 15 mph NE | 79% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 15 mph NE | 72% |
| Monday | 66°F | Showers And Thunderstorms Likely | 15 mph ENE | 61% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Tuesday | 64°F | Chance Rain Showers | 10 mph NE | 25% |
| Tuesday Night | 54°F | Mostly Cloudy | 5 to 10 mph NNE | 9% |
| Wednesday | 68°F | Partly Sunny | 5 to 10 mph NNE | 6% |
| Wednesday Night | 54°F | Partly Cloudy | 5 to 10 mph NNE | 5% |
| Thursday | 69°F | Mostly Sunny | 5 mph N | 2% |
| Thursday Night | 55°F | Partly Cloudy | 0 to 5 mph NNE | 3% |
| Friday | 72°F | Mostly Sunny | 5 mph NNE | 4% |
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 Sep 19, 2026.