LaSalle, IL 61354 Frost Dates
When can you plant in LaSalle, IL?
The last spring frost here typically falls around 04/24, about 239 days from today. The first fall frost typically arrives around 10/18, about 176 frost-free days later.
LaSalle sits in USDA Zone 5b (-15 to -10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 7 weeks of growing season left in LaSalle before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How LaSalle compares
About 176 days separate LaSalle's last and first frost, putting it 26,410 of 40,283 ZIP codes nationally. Within IL, it ranks 1,165 of 1,548.
Learn more
the frost range covers how to read the range around LaSalle's dates instead of trusting one. local microclimates covers what one yard in LaSalle can differ from the 61354 normal.