Harman US

Casey, IL Weather & Growing Conditions

Today
93°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 11am, then showers and thunderstorms likely between 11am and noon, then a chance of showers and thunderstorms between noon and 1pm, then a chance of showers and thunderstorms between 1pm and 3pm, then a slight chance of showers and thunderstorms between 3pm and 5pm. Mostly sunny, with a high near 93. West southwest wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Today 93°F Chance Showers And Thunderstorms 8 mph WSW 55%
Tonight 70°F Mostly Cloudy 3 to 7 mph S 9%
Sunday 89°F Mostly Sunny then Chance Showers And Thunderstorms 5 to 10 mph NNW 31%
Sunday Night 62°F Chance Showers And Thunderstorms 10 to 14 mph NE 60%
Monday 73°F Showers And Thunderstorms Likely 14 mph NE 69%
Monday Night 56°F Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms 12 to 16 mph NE 53%
Tuesday 70°F Slight Chance Showers And Thunderstorms 14 mph NNE 22%
Tuesday Night 54°F Slight Chance Showers And Thunderstorms then Mostly Cloudy 8 to 15 mph NNE 22%
Wednesday 72°F Mostly Sunny 12 mph N 6%
Wednesday Night 54°F Partly Cloudy 6 to 12 mph N 4%
Thursday 73°F Mostly Sunny 10 mph N 2%
Thursday Night 56°F Partly Cloudy 5 to 9 mph NNE 4%
Friday 75°F Mostly Sunny 7 to 10 mph NNE 2%
Friday Night 54°F Partly Cloudy 6 to 9 mph NE 2%

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

Growing snapshot for Casey, IL

Last spring frost
Apr 14
First fall frost
Oct 20
Growing season
187 days
Hardiness zone
6b

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

Climate data from the nearest NOAA station, Casey, Il (1.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.