Casey, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casey, a city in Clark County, Illinois.
Today
84°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 84. Southeast wind around 3 mph.
7-day forecast for Casey
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Patchy Fog then Sunny | 3 mph SE | 0% |
| Tonight | 64°F | Mostly Clear | 3 mph SE | 0% |
| Wednesday | 86°F | Sunny | 1 to 5 mph S | 0% |
| Wednesday Night | 67°F | Partly Cloudy then Chance Showers And Thunderstorms | 3 mph S | 30% |
| Thursday | 83°F | Showers And Thunderstorms Likely | 3 to 8 mph SSW | 58% |
| Thursday Night | 67°F | Chance Showers And Thunderstorms | 5 mph SSW | 41% |
| Friday | 83°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 6 mph SSW | 25% |
| Friday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 mph SSW | 21% |
| Saturday | 85°F | Slight Chance Showers And Thunderstorms | 6 mph SSW | 19% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 6 mph SSW | 17% |
| Sunday | 87°F | Sunny | 7 to 12 mph SSW | 9% |
| Sunday Night | 71°F | Mostly Clear | 9 mph SSW | 9% |
| Monday | 88°F | Mostly Sunny | 8 to 12 mph SW | 12% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 9 mph SSW | 25% |
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 Aug 4, 2026.