Oreana, IL Weather & Growing Conditions
This Afternoon
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Mostly Sunny | 6 mph S | 2% |
| Tonight | 65°F | Mostly Clear | 5 to 8 mph SSE | 1% |
| Wednesday | 85°F | Mostly Sunny | 6 to 12 mph SSW | 14% |
| Wednesday Night | 67°F | Showers And Thunderstorms Likely | 5 to 9 mph SSW | 67% |
| Thursday | 80°F | Showers And Thunderstorms Likely | 7 mph SSW | 69% |
| Thursday Night | 66°F | Chance Showers And Thunderstorms | 2 to 6 mph S | 43% |
| Friday | 82°F | Slight Chance Showers And Thunderstorms | 3 to 8 mph SSW | 21% |
| Friday Night | 66°F | Slight Chance Showers And Thunderstorms | 5 to 8 mph SSW | 24% |
| Saturday | 84°F | Slight Chance Showers And Thunderstorms | 6 to 9 mph SW | 19% |
| Saturday Night | 68°F | Slight Chance Rain Showers then Mostly Clear | 5 to 8 mph SSW | 16% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 8 to 15 mph SSW | 17% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 13 mph SSW | 27% |
| Monday | 88°F | Chance Showers And Thunderstorms | 12 to 18 mph SSW | 27% |
| Monday Night | 73°F | Chance Showers And Thunderstorms | 12 to 17 mph SW | 30% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Oreana, IL
Last spring frost
Apr 16
First fall frost
Oct 22
Growing season
187 days
Hardiness zone
6a
Explore more for Oreana, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Decatur Ap, Il (7.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.