Hillsboro, IL Weather & Growing Conditions
This Afternoon
59°F
Patchy Drizzle
Patchy drizzle before 3pm. Mostly cloudy, with a high near 59. West wind 7 to 14 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 59°F | Patchy Drizzle | 7 to 14 mph W | 0% |
| Tonight | 43°F | Mostly Cloudy | 6 mph SW | 1% |
| Thursday | 60°F | Mostly Sunny | 6 to 12 mph W | 9% |
| Thursday Night | 41°F | Mostly Cloudy | 6 mph NW | 14% |
| Friday | 53°F | Partly Sunny | 7 to 10 mph N | 2% |
| Friday Night | 30°F | Mostly Clear | 1 to 5 mph N | 0% |
| Saturday | 53°F | Sunny | 3 mph N | 0% |
| Saturday Night | 29°F | Mostly Clear | 1 mph NW | 0% |
| Sunday | 58°F | Sunny | 1 to 5 mph W | 0% |
| Sunday Night | 32°F | Mostly Clear | 1 mph NW | 0% |
| Monday | 63°F | Sunny | 0 to 5 mph SW | 0% |
| Monday Night | 36°F | Clear | 2 mph SW | 0% |
| Tuesday | 64°F | Sunny | 3 mph W | 2% |
| Tuesday Night | 37°F | Mostly Clear | 1 mph NW | 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 Nov 4, 2026.