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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.