Harman US

Cullom, IL Weather & Growing Conditions

Overnight
65°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 65. East southeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Overnight 65°F Slight Chance Showers And Thunderstorms 5 mph ESE 18%
Saturday 85°F Chance Showers And Thunderstorms 5 to 10 mph SSE 52%
Saturday Night 68°F Chance Showers And Thunderstorms 5 mph WSW 68%
Sunday 75°F Showers And Thunderstorms Likely 5 to 15 mph NNE 69%
Sunday Night 56°F Showers And Thunderstorms Likely 10 to 15 mph NE 68%
Monday 67°F Showers And Thunderstorms Likely 10 to 15 mph ENE 66%
Monday Night 52°F Chance Rain Showers 10 to 15 mph NE 39%
Tuesday 66°F Chance Rain Showers 10 mph NE 25%
Tuesday Night 51°F Mostly Cloudy 5 to 10 mph NNE 12%
Wednesday 69°F Partly Sunny 5 to 10 mph NNE 6%
Wednesday Night 52°F Partly Cloudy 0 to 5 mph NNE 6%
Thursday 70°F Partly Sunny 0 to 5 mph NNE 4%
Thursday Night 53°F Mostly Cloudy 0 to 5 mph NNE 4%
Friday 73°F Mostly Sunny 0 to 5 mph NNE 4%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Cullom, IL

Last spring frost
Apr 25
First fall frost
Oct 20
Growing season
175 days
Hardiness zone
5b

Explore more for Cullom, IL: full frost dates · planting calendar · Illinois frost dates

Climate data from the nearest NOAA station, Piper City, Il (10 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.