Kilbourne, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kilbourne, a village in Mason County, Illinois.
This Afternoon
58°F
Patchy Drizzle
Patchy drizzle. Cloudy, with a high near 58. West southwest wind 9 to 14 mph, with gusts as high as 23 mph.
7-day forecast for Kilbourne
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Patchy Drizzle | 9 to 14 mph WSW | 10% |
| Tonight | 46°F | Patchy Drizzle then Mostly Cloudy | 9 mph SW | 10% |
| Thursday | 58°F | Mostly Cloudy then Chance Light Rain | 7 to 12 mph W | 26% |
| Thursday Night | 40°F | Slight Chance Light Rain then Mostly Cloudy | 8 mph NW | 19% |
| Friday | 51°F | Partly Sunny | 6 to 10 mph N | 1% |
| Friday Night | 30°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Saturday | 53°F | Sunny | 0 to 3 mph NW | 0% |
| Saturday Night | 30°F | Mostly Clear | 1 mph W | 0% |
| Sunday | 59°F | Sunny | 1 to 5 mph W | 0% |
| Sunday Night | 33°F | Clear | 2 mph WSW | 0% |
| Monday | 64°F | Sunny | 1 to 7 mph SW | 0% |
| Monday Night | 38°F | Clear | 5 mph WSW | 0% |
| Tuesday | 65°F | Sunny | 3 mph WNW | 3% |
| Tuesday Night | 38°F | Mostly Clear | 1 mph NNW | 2% |
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 Nov 4, 2026.