Ste. Marie, IL Weather & Growing Conditions
This Afternoon
96°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly sunny. High near 96, with temperatures falling to around 86 in the afternoon. Northeast wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 96°F | Chance Showers And Thunderstorms | 7 mph NE | 31% |
| Tonight | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 8 mph E | 24% |
| Saturday | 94°F | Mostly Sunny | 3 to 9 mph SSW | 13% |
| Saturday Night | 71°F | Mostly Cloudy | 7 mph S | 7% |
| Sunday | 93°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 8 mph WNW | 21% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms | 9 mph NNE | 37% |
| Monday | 81°F | Showers And Thunderstorms Likely | 12 mph NE | 57% |
| Monday Night | 59°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 9 to 14 mph NNE | 57% |
| Tuesday | 74°F | Chance Showers And Thunderstorms then Partly Sunny | 13 mph NNE | 39% |
| Tuesday Night | 56°F | Mostly Cloudy | 7 to 13 mph NNE | 8% |
| Wednesday | 74°F | Partly Sunny | 12 mph NNE | 4% |
| Wednesday Night | 55°F | Partly Cloudy | 5 to 10 mph NNE | 4% |
| Thursday | 75°F | Mostly Sunny | 6 to 10 mph N | 4% |
| Thursday Night | 57°F | Partly Cloudy | 5 to 9 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Ste. Marie, IL
Last spring frost
Apr 13
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
6b
Explore more for Ste. Marie, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Newton 6 Sse, Il (5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.