Leonore, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Leonore, a village in Lasalle County, Illinois.
This Afternoon
70°F
Rain Showers Likely
Rain showers likely. Cloudy. High near 70, with temperatures falling to around 67 in the afternoon. South wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Leonore
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Rain Showers Likely | 15 to 20 mph S | 71% |
| Tonight | 57°F | Rain Showers | 15 mph S | 91% |
| Wednesday | 60°F | Chance Rain Showers then Mostly Cloudy | 15 mph SW | 35% |
| Wednesday Night | 47°F | Mostly Cloudy | 10 to 15 mph SW | 8% |
| Thursday | 58°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph WSW | 20% |
| Thursday Night | 43°F | Chance Rain Showers | 5 mph NW | 35% |
| Friday | 54°F | Slight Chance Rain Showers | 10 mph N | 21% |
| Friday Night | 36°F | Partly Cloudy | 0 to 5 mph NNW | 3% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph WNW | 3% |
| Saturday Night | 35°F | Partly Cloudy | 0 to 5 mph WSW | 3% |
| Sunday | 58°F | Sunny | 5 to 10 mph W | 14% |
| Sunday Night | 35°F | Mostly Clear | 5 mph W | 5% |
| Monday | 63°F | Sunny | 5 to 10 mph SW | 3% |
| Monday Night | 40°F | Mostly Clear | 5 to 10 mph WSW | 2% |
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 Nov 3, 2026.