Lostant, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lostant, a village in Lasalle County, Illinois.
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. South southwest wind 5 to 10 mph.
7-day forecast for Lostant
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 5 to 10 mph SSW | 0% |
| Tonight | 68°F | Mostly Cloudy | 5 mph S | 10% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 5 mph SSW | 53% |
| Wednesday Night | 66°F | Showers And Thunderstorms | 0 to 5 mph N | 89% |
| Thursday | 80°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 73% |
| Thursday Night | 64°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 24% |
| Friday | 82°F | Mostly Sunny | 0 mph | 12% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph SSW | 12% |
| 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 to 15 mph SSW | 10% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 mph SSW | 24% |
| Monday | 87°F | Slight Chance Showers And Thunderstorms | 10 mph SSW | 24% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph SW | 35% |
Forecast source: National Weather Service (api.weather.gov) for Lostant (41.125, -89.067). Updated through the day.
Growing snapshot for Lostant
Last spring frost
Apr 24
First fall frost
Oct 18
Growing season
176 days
Hardiness zone
5b
More local growing data for Lostant: nearby ZIP 61334 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Cedar Point
Dana
Dayton
Earlville
Grand Ridge
Harding
Kangley
LaSalle
Leland
Leonore
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, Peru, Il (14 mi from Lostant). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.