Smithboro, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smithboro, a village in Bond County, Illinois.
This Afternoon
73°F
Slight Chance T-storms
A slight chance of thunderstorms and a slight chance of rain before 3pm, then rain likely and a slight chance of thunderstorms. Cloudy, with a high near 73. South wind 18 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 70%.
7-day forecast for Smithboro
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Slight Chance T-storms | 18 to 23 mph S | 69% |
| Tonight | 54°F | Rain | 10 to 16 mph S | 97% |
| Wednesday | 64°F | Chance Rain Showers then Mostly Cloudy | 7 to 14 mph SW | 12% |
| Wednesday Night | 42°F | Partly Cloudy | 6 mph SW | 0% |
| Thursday | 65°F | Sunny | 5 to 12 mph W | 0% |
| Thursday Night | 42°F | Mostly Cloudy | 3 mph NW | 4% |
| Friday | 58°F | Mostly Cloudy | 5 to 10 mph NW | 7% |
| Friday Night | 36°F | Partly Cloudy | 2 to 6 mph N | 1% |
| Saturday | 56°F | Mostly Sunny | 3 mph NW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 1 mph NW | 0% |
| Sunday | 61°F | Sunny | 1 to 7 mph W | 6% |
| Sunday Night | 34°F | Mostly Clear | 3 mph NW | 5% |
| Monday | 65°F | Sunny | 2 to 8 mph SW | 2% |
| Monday Night | 38°F | Mostly Clear | 3 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Smithboro (38.895, -89.340). Updated through the day.
Growing snapshot for Smithboro
Last spring frost
Apr 10
First fall frost
Oct 24
Growing season
196 days
Hardiness zone
6b
More local growing data for Smithboro: nearby ZIP 62284 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Vandalia, Il (13.3 mi from Smithboro). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.