Harman US

Kilbourne, IL Weather & Growing Conditions

Overnight
70°F
Mostly Cloudy
Mostly cloudy, with a low around 70. Southeast wind around 6 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 70°F Mostly Cloudy 6 mph SE 7%
Saturday 90°F Mostly Cloudy 6 mph S 11%
Saturday Night 68°F Chance Showers And Thunderstorms 3 mph SW 43%
Sunday 79°F Chance Showers And Thunderstorms 2 to 9 mph N 65%
Sunday Night 59°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 3%
Wednesday Night 53°F Partly Cloudy 2 to 6 mph NNE 2%
Thursday 70°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 3%

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 Sep 19, 2026.