Mill Creek, IL 62961 Frost Dates
When can you plant in Mill Creek, IL?
Around 04/05 is the usual last spring frost, about 220 days away. The first fall frost typically arrives around 10/25, about 201 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mill Creek in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 8 weeks of growing season left in Mill Creek before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Mill Creek's last frost
04/05 is the middle of 30 years of NOAA records, not a promise. Plant by 03/19 and you're betting against frost in roughly 9 years out of 10. 04/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mill Creek compares
About 201 days separate Mill Creek's last and first frost, putting it 17,697 of 40,283 ZIP codes nationally. Within IL, it ranks 268 of 1,548.
Learn more
the frost range covers how to read the range around Mill Creek's dates instead of trusting one. local microclimates covers what one yard in Mill Creek can differ from the 62961 normal.