Kilbourne, IL Weather & Growing Conditions
Overnight
55°F
Slight Chance Light Rain
A slight chance of rain before 3am. Mostly cloudy, with a low around 55. South southwest wind around 12 mph, with gusts as high as 21 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Slight Chance Light Rain | 12 mph SSW | 18% |
| Wednesday | 59°F | Patchy Drizzle | 10 to 15 mph WSW | 10% |
| Wednesday Night | 46°F | Patchy Drizzle then Mostly Cloudy | 10 mph WSW | 10% |
| Thursday | 59°F | Mostly Cloudy then Slight Chance Light Rain | 9 to 13 mph W | 15% |
| Thursday Night | 42°F | Mostly Cloudy | 7 mph NW | 14% |
| Friday | 53°F | Partly Sunny | 9 mph N | 6% |
| Friday Night | 32°F | Partly Cloudy | 1 to 6 mph N | 0% |
| Saturday | 53°F | Sunny | 3 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 1 mph WNW | 1% |
| Sunday | 59°F | Sunny | 1 to 6 mph W | 1% |
| Sunday Night | 33°F | Clear | 2 mph WSW | 1% |
| Monday | 64°F | Sunny | 1 to 6 mph SW | 0% |
| Monday Night | 38°F | Clear | 3 mph SW | 0% |
| Tuesday | 66°F | Sunny | 3 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Kilbourne, IL
Last spring frost
Apr 17
First fall frost
Oct 19
Growing season
185 days
Hardiness zone
6a
Explore more for Kilbourne, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Havana, Il (10.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.