Olney, IL Weather & Growing Conditions
Today
85°F
Sunny
Sunny, with a high near 85. East wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 2 mph E | 0% |
| Tonight | 64°F | Mostly Clear | 2 mph ESE | 0% |
| Wednesday | 88°F | Sunny | 3 mph S | 0% |
| Wednesday Night | 68°F | Partly Cloudy | 3 mph S | 9% |
| Thursday | 86°F | Chance Showers And Thunderstorms | 2 to 7 mph SSW | 38% |
| Thursday Night | 69°F | Showers And Thunderstorms Likely | 1 to 5 mph SSE | 59% |
| Friday | 85°F | Chance Showers And Thunderstorms | 2 to 6 mph SSW | 42% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 3 mph SSW | 31% |
| Saturday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph SSW | 31% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph S | 22% |
| Sunday | 88°F | Sunny | 5 to 9 mph SSW | 11% |
| Sunday Night | 72°F | Mostly Clear | 7 mph SSW | 11% |
| Monday | 90°F | Sunny | 6 to 10 mph SW | 10% |
| Monday Night | 73°F | Slight Chance Showers And Thunderstorms | 7 mph SSW | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Olney, IL
Last spring frost
Apr 15
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
6b
Explore more for Olney, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Olney 2S, Il (1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.