Leonore, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Leonore, a village in Lasalle County, Illinois.
Overnight
66°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 66. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Leonore
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Slight Chance Showers And Thunderstorms | 10 mph SE | 24% |
| Saturday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SSE | 52% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely | 5 mph WNW | 77% |
| Sunday | 72°F | Showers And Thunderstorms | 5 to 15 mph NE | 77% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 72% |
| Monday | 66°F | Showers And Thunderstorms Likely | 15 mph ENE | 64% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph NE | 38% |
| Tuesday | 65°F | Chance Rain Showers | 10 to 15 mph NE | 26% |
| Tuesday Night | 52°F | Mostly Cloudy | 5 to 10 mph NNE | 7% |
| Wednesday | 68°F | Partly Sunny | 5 to 10 mph NNE | 5% |
| Wednesday Night | 53°F | Partly Cloudy | 5 to 10 mph NNE | 5% |
| Thursday | 70°F | Mostly Sunny | 5 mph N | 2% |
| Thursday Night | 55°F | Partly Cloudy | 0 to 5 mph NNE | 3% |
| Friday | 72°F | Mostly Sunny | 0 to 5 mph NNE | 3% |
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 Sep 19, 2026.