Kilbourne, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kilbourne, a village in Mason County, Illinois.
Today
89°F
Mostly Cloudy
Mostly cloudy, with a high near 89. South southwest wind around 6 mph.
7-day forecast for Kilbourne
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Mostly Cloudy | 6 mph SSW | 10% |
| Tonight | 68°F | Chance Showers And Thunderstorms | 3 mph SW | 44% |
| Sunday | 79°F | Chance Showers And Thunderstorms | 2 to 9 mph N | 65% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 7 to 10 mph NE | 70% |
| Monday | 67°F | Showers And Thunderstorms Likely | 12 mph NE | 70% |
| Monday Night | 54°F | Chance Rain Showers | 7 to 10 mph NE | 47% |
| Tuesday | 65°F | Slight Chance Rain Showers | 10 mph NE | 22% |
| Tuesday Night | 50°F | Partly Cloudy | 3 to 9 mph NNE | 11% |
| Wednesday | 68°F | Mostly Sunny | 5 to 8 mph NNE | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 2 to 6 mph NNE | 2% |
| Thursday | 71°F | Mostly Sunny | 5 mph NNE | 4% |
| Thursday Night | 55°F | Partly Cloudy | 3 mph NNE | 3% |
| Friday | 74°F | Mostly Sunny | 2 to 6 mph NE | 4% |
| Friday Night | 54°F | Partly Cloudy | 5 mph ENE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Kilbourne (40.152, -90.012). Updated through the day.
Growing snapshot for Kilbourne
Last spring frost
Apr 17
First fall frost
Oct 19
Growing season
185 days
Hardiness zone
6a
More local growing data for Kilbourne: nearby ZIP 62655 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Havana, Il (10.1 mi from Kilbourne). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.