Hillsboro, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hillsboro, a city in Montgomery County, Illinois.
Today
59°F
Slight Chance Drizzle
A slight chance of drizzle before 3pm. Mostly cloudy, with a high near 59. West wind 8 to 13 mph.
7-day forecast for Hillsboro
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 59°F | Slight Chance Drizzle | 8 to 13 mph W | 12% |
| Tonight | 42°F | Partly Cloudy | 6 mph SW | 1% |
| Thursday | 62°F | Mostly Sunny | 6 to 10 mph W | 0% |
| Thursday Night | 42°F | Mostly Cloudy | 5 mph NW | 0% |
| Friday | 55°F | Partly Sunny | 6 to 9 mph N | 2% |
| Friday Night | 32°F | Partly Cloudy | 1 to 6 mph N | 0% |
| Saturday | 54°F | Mostly Sunny | 3 mph NW | 0% |
| Saturday Night | 31°F | Partly Cloudy | 1 mph NW | 0% |
| Sunday | 58°F | Sunny | 1 to 6 mph NW | 1% |
| Sunday Night | 32°F | Clear | 2 mph NW | 1% |
| Monday | 64°F | Sunny | 0 to 6 mph SW | 0% |
| Monday Night | 37°F | Clear | 2 mph SW | 0% |
| Tuesday | 67°F | Sunny | 3 mph W | 1% |
| Tuesday Night | 39°F | Mostly Clear | 1 mph N | 2% |
Forecast source: National Weather Service (api.weather.gov) for Hillsboro (39.176, -89.473). Updated through the day.
Growing snapshot for Hillsboro
Last spring frost
Apr 13
First fall frost
Oct 24
Growing season
192 days
Hardiness zone
6b
More local growing data for Hillsboro: nearby ZIP 62049 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Butler
Coalton
Coffeen
Donnellson
Farmersville
Fillmore
Harvel
Irving
Litchfield
Nokomis
Ohlman
Panama
Raymond
Schram City
Taylor Springs
Waggoner
Walshville
Wenonah
Witt
Climate data from the nearest NOAA station, Hillsboro, Il (1.5 mi from Hillsboro). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.