Marseilles, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marseilles, a city in Lasalle County, Illinois.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South southwest wind 5 to 10 mph.
7-day forecast for Marseilles
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 to 10 mph SSW | 1% |
| Tonight | 68°F | Mostly Cloudy | 5 mph S | 10% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 5 mph SW | 56% |
| Wednesday Night | 67°F | Showers And Thunderstorms | 0 to 5 mph WNW | 90% |
| Thursday | 81°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 73% |
| Thursday Night | 65°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 26% |
| Friday | 83°F | Mostly Sunny | 0 mph | 6% |
| Friday Night | 67°F | Mostly Clear | 0 mph | 9% |
| Saturday | 86°F | Mostly Sunny | 0 to 5 mph SSW | 11% |
| Saturday Night | 71°F | Mostly Clear | 5 mph SSW | 11% |
| Sunday | 88°F | Mostly Sunny | 5 to 10 mph SW | 9% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 29% |
| Monday | 88°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 29% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 5 to 10 mph WSW | 38% |
Forecast source: National Weather Service (api.weather.gov) for Marseilles (41.282, -88.681). Updated through the day.
Growing snapshot for Marseilles
Last spring frost
Apr 27
First fall frost
Oct 17
Growing season
171 days
Hardiness zone
5b
More local growing data for Marseilles: nearby ZIP 61341 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Cedar Point
Dana
Dayton
Earlville
Grand Ridge
Harding
Kangley
LaSalle
Leland
Leonore
Lostant
Mendota
Millington
Naplate
Newark
North Utica
Oglesby
Ottawa
Peru
Ransom
Rutland
Seneca
Serena
Sheridan
Streator
Tonica
Triumph
Troy Grove
Wedron
Wenona
Climate data from the nearest NOAA station, Marseilles Lock, Il (3.5 mi from Marseilles). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.