Kilbourne, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kilbourne, a village in Mason County, Illinois.
This Afternoon
85°F
Mostly Sunny
Mostly sunny, with a high near 85. East wind around 7 mph.
7-day forecast for Kilbourne
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Mostly Sunny | 7 mph E | 4% |
| Tonight | 71°F | Partly Cloudy | 8 mph ESE | 8% |
| Saturday | 90°F | Mostly Cloudy | 7 mph SSW | 11% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms | 6 mph S | 42% |
| Sunday | 81°F | Rain Showers Likely | 2 to 8 mph NNW | 65% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely | 9 mph NE | 68% |
| Monday | 68°F | Showers And Thunderstorms Likely | 10 mph NE | 68% |
| Monday Night | 55°F | Chance Showers And Thunderstorms | 7 to 10 mph NE | 44% |
| Tuesday | 66°F | Chance Rain Showers then Mostly Cloudy | 9 mph NE | 33% |
| Tuesday Night | 51°F | Mostly Cloudy | 3 to 8 mph NNE | 5% |
| Wednesday | 70°F | Partly Sunny | 7 mph NNE | 3% |
| Wednesday Night | 53°F | Partly Cloudy | 5 mph NNE | 1% |
| Thursday | 71°F | Mostly Sunny | 5 mph NNE | 4% |
| Thursday Night | 55°F | Partly Cloudy | 3 mph NNE | 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.