Smithton, IL Weather & Growing Conditions
This Afternoon
73°F
Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 73, with temperatures falling to around 68 in the afternoon. South wind 15 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Rain | 15 to 18 mph S | 92% |
| Tonight | 54°F | Rain | 7 to 15 mph S | 97% |
| Wednesday | 64°F | Mostly Cloudy | 6 to 12 mph W | 6% |
| Wednesday Night | 44°F | Partly Cloudy | 5 mph SW | 0% |
| Thursday | 67°F | Sunny | 3 to 8 mph W | 1% |
| Thursday Night | 45°F | Mostly Cloudy | 5 mph NW | 8% |
| Friday | 58°F | Partly Sunny | 5 to 9 mph NW | 4% |
| Friday Night | 39°F | Partly Cloudy | 5 mph N | 1% |
| Saturday | 56°F | Partly Sunny | 3 mph NW | 0% |
| Saturday Night | 36°F | Partly Cloudy | 1 mph NW | 0% |
| Sunday | 62°F | Sunny | 1 to 6 mph W | 7% |
| Sunday Night | 36°F | Mostly Clear | 3 mph W | 5% |
| Monday | 66°F | Sunny | 2 to 6 mph SW | 2% |
| Monday Night | 41°F | Mostly Clear | 3 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Smithton, IL
Last spring frost
Apr 12
First fall frost
Oct 20
Growing season
189 days
Hardiness zone
7a
Explore more for Smithton, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Belleville Siu Rsch, Il (12.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.