Leonore, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Leonore, a village in Lasalle County, Illinois.
This Afternoon
76°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 5pm. Partly sunny, with a high near 76. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Leonore
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Showers And Thunderstorms Likely | 10 mph E | 56% |
| Tonight | 66°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 10 mph ESE | 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% |
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 18, 2026.