Smithfield, IL Weather & Growing Conditions
This Afternoon
70°F
Light Rain
Rain and a chance of thunderstorms. Cloudy, with a high near 70. South southeast wind around 16 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Light Rain | 16 mph SSE | 90% |
| Tonight | 52°F | Light Rain Likely | 10 to 16 mph S | 72% |
| Wednesday | 58°F | Chance Rain Showers then Mostly Cloudy | 12 to 16 mph SW | 12% |
| Wednesday Night | 44°F | Mostly Cloudy | 9 mph SW | 3% |
| Thursday | 58°F | Partly Sunny | 7 to 12 mph W | 12% |
| Thursday Night | 42°F | Mostly Cloudy then Chance Light Rain | 6 mph NW | 28% |
| Friday | 54°F | Mostly Cloudy | 6 to 9 mph N | 14% |
| Friday Night | 35°F | Mostly Cloudy | 0 to 5 mph N | 2% |
| Saturday | 54°F | Mostly Sunny | 2 mph WNW | 2% |
| Saturday Night | 34°F | Partly Cloudy | 1 mph WNW | 1% |
| Sunday | 60°F | Sunny | 1 to 6 mph WNW | 10% |
| Sunday Night | 35°F | Mostly Clear | 3 mph W | 3% |
| Monday | 64°F | Sunny | 1 to 8 mph SW | 1% |
| Monday Night | 40°F | Mostly Clear | 5 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Smithfield, IL
Last spring frost
Apr 17
First fall frost
Oct 22
Growing season
185 days
Hardiness zone
6a
Explore more for Smithfield, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Prairie City 2S, Il (10.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.