Marissa, IL Weather & Growing Conditions
Tonight
55°F
Rain
Rain and a slight chance of thunderstorms before 3am, then a chance of rain showers between 3am and 4am, then a slight chance of rain between 4am and 5am, then a chance of rain showers. Cloudy, with a low around 55. South wind 7 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 100%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Rain | 7 to 16 mph S | 97% |
| Wednesday | 65°F | Chance Rain Showers then Mostly Cloudy | 5 to 12 mph SW | 10% |
| Wednesday Night | 43°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 68°F | Sunny | 3 to 9 mph W | 0% |
| Thursday Night | 44°F | Mostly Cloudy | 3 mph NW | 6% |
| Friday | 59°F | Mostly Cloudy | 5 to 10 mph NW | 4% |
| Friday Night | 38°F | Partly Cloudy | 5 mph N | 1% |
| Saturday | 56°F | Partly Sunny | 1 to 5 mph NW | 0% |
| Saturday Night | 35°F | Partly Cloudy | 1 mph NW | 0% |
| Sunday | 62°F | Sunny | 1 to 6 mph W | 6% |
| Sunday Night | 35°F | Mostly Clear | 2 mph NW | 5% |
| Monday | 66°F | Sunny | 1 to 7 mph W | 2% |
| Monday Night | 39°F | Mostly Clear | 2 mph SW | 0% |
| Tuesday | 69°F | Sunny | 5 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marissa, IL
Last spring frost
Apr 12
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
7a
Explore more for Marissa, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Sparta 1 W, Il (11.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.