Oak Run, IL Weather & Growing Conditions
Overnight
54°F
Slight Chance Light Rain
A slight chance of rain. Cloudy. Low around 54, with temperatures rising to around 60 overnight. Southwest wind around 12 mph, with gusts as high as 23 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Slight Chance Light Rain | 12 mph SW | 17% |
| Wednesday | 59°F | Slight Chance Light Rain then Slight Chance Drizzle | 15 mph WSW | 19% |
| Wednesday Night | 44°F | Slight Chance Drizzle then Cloudy | 13 mph WSW | 10% |
| Thursday | 56°F | Chance Light Rain | 10 to 14 mph W | 26% |
| Thursday Night | 41°F | Slight Chance Light Rain then Mostly Cloudy | 6 to 9 mph NW | 23% |
| Friday | 52°F | Partly Sunny | 6 to 12 mph N | 9% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 2 mph WNW | 2% |
| Sunday | 58°F | Sunny | 2 to 7 mph W | 2% |
| Sunday Night | 34°F | Clear | 2 mph W | 1% |
| Monday | 64°F | Sunny | 0 to 8 mph W | 0% |
| Monday Night | 39°F | Mostly Clear | 1 to 5 mph WSW | 0% |
| Tuesday | 65°F | Sunny | 3 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Oak Run, IL
Last spring frost
Apr 21
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
5b
Explore more for Oak Run, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Knoxville, Il (9.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.