Hillsboro, IL Weather & Growing Conditions
Tonight
69°F
Partly Cloudy
Partly cloudy, with a low around 69. Southeast wind 6 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 69°F | Partly Cloudy | 6 to 9 mph SE | 13% |
| Saturday | 95°F | Mostly Sunny | 6 mph SW | 7% |
| Saturday Night | 70°F | Partly Cloudy | 3 mph S | 6% |
| Sunday | 90°F | Chance Rain Showers | 1 to 6 mph NW | 27% |
| Sunday Night | 63°F | Showers And Thunderstorms Likely | 7 mph NE | 57% |
| Monday | 77°F | Showers And Thunderstorms Likely | 6 to 10 mph NE | 61% |
| Monday Night | 56°F | Showers And Thunderstorms Likely | 6 to 12 mph NE | 61% |
| Tuesday | 71°F | Chance Rain Showers then Mostly Cloudy | 10 mph NE | 26% |
| Tuesday Night | 52°F | Mostly Cloudy | 5 to 10 mph N | 4% |
| Wednesday | 73°F | Mostly Sunny | 5 to 8 mph N | 3% |
| Wednesday Night | 52°F | Partly Cloudy | 2 to 7 mph N | 3% |
| Thursday | 75°F | Mostly Sunny | 2 to 7 mph N | 3% |
| Thursday Night | 55°F | Partly Cloudy | 2 to 6 mph N | 3% |
| Friday | 76°F | Mostly Sunny | 2 to 7 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hillsboro, IL
Last spring frost
Apr 13
First fall frost
Oct 24
Growing season
192 days
Hardiness zone
6b
Explore more for Hillsboro, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Hillsboro, Il (1.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.