Casey, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casey, a city in Clark County, Illinois.
Tonight
70°F
Partly Cloudy
Partly cloudy, with a low around 70. East southeast wind around 8 mph.
7-day forecast for Casey
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Partly Cloudy | 8 mph ESE | 5% |
| Saturday | 93°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 10 mph SSW | 22% |
| Saturday Night | 71°F | Mostly Cloudy | 8 mph S | 14% |
| Sunday | 90°F | Slight Chance Showers And Thunderstorms | 5 to 9 mph WNW | 24% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 12 mph NNE | 47% |
| Monday | 77°F | Showers And Thunderstorms Likely | 14 mph NE | 59% |
| Monday Night | 57°F | Showers And Thunderstorms Likely | 12 to 15 mph NE | 59% |
| Tuesday | 72°F | Chance Showers And Thunderstorms then Partly Sunny | 15 mph NNE | 39% |
| Tuesday Night | 54°F | Mostly Cloudy | 8 to 15 mph NNE | 8% |
| Wednesday | 73°F | Partly Sunny | 12 mph NNE | 4% |
| Wednesday Night | 55°F | Partly Cloudy | 5 to 12 mph NNE | 3% |
| Thursday | 74°F | Mostly Sunny | 7 to 10 mph N | 3% |
| Thursday Night | 56°F | Partly Cloudy | 5 to 9 mph NNE | 3% |
| Friday | 75°F | Mostly Sunny | 6 to 10 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Casey (39.305, -87.985). Updated through the day.
Growing snapshot for Casey
Last spring frost
Apr 14
First fall frost
Oct 20
Growing season
187 days
Hardiness zone
6b
More local growing data for Casey: nearby ZIP 62420 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Casey, Il (1.5 mi from Casey). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.