Olney, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Olney, a city in Richland County, Illinois.
Overnight
63°F
Mostly Clear
Mostly clear, with a low around 63. East wind around 2 mph.
7-day forecast for Olney
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Mostly Clear | 2 mph E | 0% |
| Tuesday | 85°F | Sunny | 2 mph E | 0% |
| Tuesday Night | 64°F | Mostly Clear | 2 mph ESE | 0% |
| Wednesday | 87°F | Sunny | 3 mph S | 0% |
| Wednesday Night | 68°F | Partly Cloudy | 3 mph S | 9% |
| Thursday | 85°F | Chance Showers And Thunderstorms | 2 to 7 mph SW | 39% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 1 to 5 mph SSE | 59% |
| Friday | 85°F | Chance Showers And Thunderstorms | 2 to 6 mph SSW | 41% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 3 mph SSW | 30% |
| Saturday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph SSW | 30% |
| 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% |
Forecast source: National Weather Service (api.weather.gov) for Olney (38.728, -88.084). Updated through the day.
Growing snapshot for Olney
Last spring frost
Apr 15
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
6b
More local growing data for Olney: nearby ZIP 62450 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Olney 2S, Il (1 mi from Olney). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.