Marissa, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marissa, a village in St. Clair County, Illinois.
This Afternoon
73°F
Slight Chance T-storms
A slight chance of thunderstorms and a slight chance of rain before 1pm, then rain and a slight chance of thunderstorms. Cloudy. High near 73, with temperatures falling to around 69 in the afternoon. South wind 17 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 90%.
7-day forecast for Marissa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Slight Chance T-storms | 17 to 22 mph S | 88% |
| Tonight | 55°F | Rain | 7 to 15 mph S | 96% |
| Wednesday | 66°F | Mostly Cloudy | 5 to 12 mph SW | 9% |
| Wednesday Night | 45°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 70°F | Sunny | 3 to 9 mph SW | 2% |
| Thursday Night | 46°F | Slight Chance Light Rain then Mostly Cloudy | 5 mph W | 19% |
| Friday | 62°F | Partly Sunny | 5 to 10 mph NW | 2% |
| Friday Night | 43°F | Partly Cloudy | 3 mph NW | 1% |
| Saturday | 60°F | Partly Sunny | 1 to 5 mph N | 0% |
| Saturday Night | 39°F | Partly Cloudy | 2 mph NW | 1% |
| Sunday | 61°F | Mostly Sunny | 2 to 7 mph NW | 4% |
| Sunday Night | 38°F | Mostly Clear | 3 mph W | 6% |
| Monday | 63°F | Sunny | 2 to 6 mph SW | 3% |
| Monday Night | 39°F | Mostly Clear | 1 mph SW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Marissa (38.250, -89.771). Updated through the day.
Growing snapshot for Marissa
Last spring frost
Apr 12
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
7a
More local growing data for Marissa: nearby ZIP 62257 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Sparta 1 W, Il (11.6 mi from Marissa). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.