LaSalle County, Illinois
Local growing conditions for LaSalle County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 26 ZIP codes in our data.
Hardiness zones in LaSalle County
LaSalle County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in LaSalle County for its live forecast, frost dates, and planting calendar:
Ransom 60470
Earlville 60518
Leland 60531
Millington 60537
Serena 60549
Sheridan 60551
Wedron 60557
LaSalle 61301
Cedar Point 61316
Dana 61321
Grand Ridge 61325
Leonore 61332
Lostant 61334
Marseilles 61341
Mendota 61342
Oglesby 61348
Ottawa 61350
Peru 61354
Rutland 61358
Seneca 61360
Streator 61364
Tonica 61370
Triumph 61371
Troy Grove 61372
More for Illinois
- Agriculture in Illinois
- Frost dates across Illinois
- USDA hardiness zones explained
- Planting calendar by ZIP code
County growing conditions are compiled from our ZIP-code database, USDA hardiness-zone data, and NOAA climate normals. Conditions vary within a county by elevation and local microclimate. Page updated Aug 4, 2026.