Thomasboro, IL Weather & Growing Conditions
This Afternoon
73°F
Chance Light Rain
A chance of rain after 4pm. Partly sunny, with a high near 73. South southeast wind 16 to 20 mph, with gusts as high as 32 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 | 73°F | Chance Light Rain | 16 to 20 mph SSE | 29% |
| Tonight | 56°F | Light Rain | 16 mph S | 83% |
| Wednesday | 63°F | Chance Light Rain then Mostly Cloudy | 10 to 16 mph SSW | 30% |
| Wednesday Night | 45°F | Mostly Cloudy | 9 mph SW | 3% |
| Thursday | 62°F | Mostly Sunny | 7 to 15 mph WSW | 5% |
| Thursday Night | 43°F | Mostly Cloudy | 6 mph WNW | 11% |
| Friday | 56°F | Slight Chance Light Rain then Mostly Cloudy | 5 to 10 mph NNW | 18% |
| Friday Night | 36°F | Mostly Cloudy | 3 to 8 mph NNW | 7% |
| Saturday | 54°F | Mostly Sunny | 5 mph NW | 3% |
| Saturday Night | 33°F | Partly Cloudy | 2 mph W | 2% |
| Sunday | 60°F | Mostly Sunny | 2 to 8 mph W | 11% |
| Sunday Night | 34°F | Mostly Clear | 6 mph WNW | 8% |
| Monday | 63°F | Sunny | 3 to 9 mph WSW | 4% |
| Monday Night | 38°F | Mostly Clear | 6 mph WSW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Thomasboro, IL
Last spring frost
Apr 21
First fall frost
Oct 18
Growing season
179 days
Hardiness zone
6a
Explore more for Thomasboro, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Rantoul, Il (4.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.