Leonore, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Leonore, a village in Lasalle County, Illinois.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South southwest wind around 5 mph, with gusts as high as 15 mph.
7-day forecast for Leonore
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 mph SSW | 1% |
| Tonight | 68°F | Mostly Cloudy | 5 mph S | 11% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 55% |
| Wednesday Night | 66°F | Showers And Thunderstorms | 0 to 5 mph NW | 89% |
| Thursday | 80°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 71% |
| Thursday Night | 64°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 25% |
| Friday | 83°F | Mostly Sunny | 0 mph | 9% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph SSW | 10% |
| Saturday | 85°F | Mostly Sunny | 5 mph SSW | 8% |
| Saturday Night | 71°F | Mostly Clear | 5 to 10 mph SSW | 8% |
| Sunday | 87°F | Sunny | 10 mph SSW | 10% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 mph SSW | 25% |
| Monday | 87°F | Chance Showers And Thunderstorms | 10 mph SSW | 25% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph SW | 36% |
Forecast source: National Weather Service (api.weather.gov) for Leonore (41.189, -88.982). Updated through the day.
Growing snapshot for Leonore
Last spring frost
Apr 20
First fall frost
Oct 22
Growing season
183 days
Hardiness zone
5b
More local growing data for Leonore: nearby ZIP 61332 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Cedar Point
Dana
Dayton
Earlville
Grand Ridge
Harding
Kangley
LaSalle
Leland
Lostant
Marseilles
Mendota
Millington
Naplate
Newark
North Utica
Oglesby
Ottawa
Peru
Ransom
Rutland
Seneca
Serena
Sheridan
Streator
Tonica
Triumph
Troy Grove
Wedron
Wenona
Climate data from the nearest NOAA station, Ottawa 5Sw, Il (10.4 mi from Leonore). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.