Roanoke, IL Weather & Growing Conditions
This Afternoon
70°F
Light Rain Likely
Rain likely and a slight chance of thunderstorms. Mostly cloudy, with a high near 70. South wind 18 to 23 mph, with gusts as high as 36 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Light Rain Likely | 18 to 23 mph S | 69% |
| Tonight | 54°F | Light Rain | 14 to 17 mph S | 90% |
| Wednesday | 60°F | Chance Light Rain then Mostly Cloudy | 16 mph SW | 29% |
| Wednesday Night | 45°F | Mostly Cloudy | 9 to 13 mph SW | 6% |
| Thursday | 59°F | Mostly Cloudy | 9 to 14 mph WSW | 10% |
| Thursday Night | 42°F | Chance Light Rain | 3 to 8 mph NW | 32% |
| Friday | 54°F | Slight Chance Light Rain | 7 to 12 mph N | 20% |
| Friday Night | 35°F | Partly Cloudy | 2 to 8 mph NNW | 4% |
| Saturday | 53°F | Mostly Sunny | 5 mph WNW | 3% |
| Saturday Night | 34°F | Partly Cloudy | 3 mph WSW | 3% |
| Sunday | 59°F | Sunny | 3 to 9 mph W | 14% |
| Sunday Night | 34°F | Mostly Clear | 6 mph W | 6% |
| Monday | 63°F | Sunny | 3 to 12 mph SW | 3% |
| Monday Night | 39°F | Mostly Clear | 5 to 8 mph WSW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Roanoke, IL
Last spring frost
Apr 26
First fall frost
Oct 17
Growing season
173 days
Hardiness zone
5b
Explore more for Roanoke, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Minonk, Il (11.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.