Olney, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Olney, a city in Richland County, Illinois.
This Afternoon
95°F
Mostly Sunny
Mostly sunny, with a high near 95. West southwest wind around 8 mph.
7-day forecast for Olney
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 95°F | Mostly Sunny | 8 mph WSW | 13% |
| Tonight | 71°F | Partly Cloudy | 5 mph S | 10% |
| Sunday | 94°F | Mostly Sunny | 3 to 9 mph WSW | 7% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 7 to 12 mph NNE | 52% |
| Monday | 82°F | Chance Showers And Thunderstorms | 8 to 12 mph NE | 51% |
| Monday Night | 59°F | Chance Showers And Thunderstorms | 7 to 12 mph NE | 47% |
| Tuesday | 75°F | Slight Chance Showers And Thunderstorms | 12 mph NNE | 44% |
| Tuesday Night | 56°F | Mostly Cloudy | 6 to 12 mph NNE | 12% |
| Wednesday | 75°F | Mostly Sunny | 6 to 10 mph N | 9% |
| Wednesday Night | 55°F | Partly Cloudy | 3 to 10 mph N | 3% |
| Thursday | 76°F | Partly Sunny | 5 to 8 mph N | 1% |
| Thursday Night | 57°F | Mostly Cloudy | 2 to 7 mph NNE | 1% |
| Friday | 78°F | Partly Sunny | 3 to 8 mph NNE | 3% |
| Friday Night | 57°F | Partly Cloudy | 3 to 7 mph NNE | 3% |
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 Sep 19, 2026.