Le Roy, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Le Roy, a city in Mclean County, Illinois.
Today
86°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 86. Southeast wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Le Roy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Chance Showers And Thunderstorms | 8 mph SE | 47% |
| Tonight | 68°F | Chance Showers And Thunderstorms | 7 mph SSW | 40% |
| Sunday | 77°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 17 mph N | 70% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 15 to 18 mph NE | 62% |
| Monday | 66°F | Showers And Thunderstorms Likely | 17 to 21 mph ENE | 67% |
| Monday Night | 52°F | Chance Rain Showers | 14 to 21 mph NE | 52% |
| Tuesday | 65°F | Chance Showers And Thunderstorms | 18 mph NE | 35% |
| Tuesday Night | 50°F | Chance Showers And Thunderstorms then Mostly Cloudy | 10 to 20 mph NNE | 35% |
| Wednesday | 67°F | Mostly Sunny | 10 to 15 mph NNE | 4% |
| Wednesday Night | 52°F | Partly Cloudy | 7 to 14 mph NNE | 4% |
| Thursday | 70°F | Partly Sunny | 8 to 12 mph NNE | 3% |
| Thursday Night | 53°F | Partly Cloudy | 6 to 12 mph NNE | 3% |
| Friday | 72°F | Mostly Sunny | 7 to 12 mph NE | 3% |
| Friday Night | 52°F | Partly Cloudy | 6 to 10 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Le Roy (40.339, -88.761). Updated through the day.
Growing snapshot for Le Roy
Last spring frost
Apr 25
First fall frost
Oct 16
Growing season
172 days
Hardiness zone
6a
More local growing data for Le Roy: nearby ZIP 61752 weather · frost dates · planting calendar · Illinois frost dates
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McLean
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Climate data from the nearest NOAA station, Normal 4Ne, Il (17.7 mi from Le Roy). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.