Oreana, IL Weather & Growing Conditions
This Afternoon
73°F
Slight Chance T-storms
A slight chance of thunderstorms and a slight chance of rain before 2pm, then a chance of rain and a slight chance of thunderstorms. Mostly cloudy, with a high near 73. South wind around 24 mph, with gusts as high as 37 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Slight Chance T-storms | 24 mph S | 51% |
| Tonight | 54°F | Light Rain | 17 to 21 mph S | 83% |
| Wednesday | 61°F | Slight Chance Light Rain then Mostly Cloudy | 15 to 18 mph SW | 23% |
| Wednesday Night | 43°F | Mostly Cloudy | 10 to 14 mph SW | 1% |
| Thursday | 61°F | Mostly Sunny | 12 to 17 mph WSW | 4% |
| Thursday Night | 41°F | Mostly Cloudy then Slight Chance Light Rain | 5 to 10 mph WNW | 17% |
| Friday | 55°F | Mostly Cloudy | 8 to 14 mph NNW | 14% |
| Friday Night | 35°F | Mostly Cloudy | 3 to 12 mph NNW | 6% |
| Saturday | 53°F | Mostly Sunny | 3 to 7 mph NW | 1% |
| Saturday Night | 32°F | Partly Cloudy | 5 mph W | 1% |
| Sunday | 60°F | Sunny | 3 to 12 mph W | 10% |
| Sunday Night | 33°F | Mostly Clear | 5 to 9 mph WNW | 6% |
| Monday | 64°F | Sunny | 5 to 14 mph WSW | 2% |
| Monday Night | 38°F | Mostly Clear | 6 to 10 mph WSW | 2% |
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 Nov 4, 2026.