Stillman Valley, IL 61084 Frost Dates
When can you plant in Stillman Valley, IL?
Around 04/24 is the usual last spring frost, about 239 days away. The first fall frost typically arrives around 10/17, about 174 frost-free days later.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Stillman Valley, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in Stillman Valley before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Stillman Valley's last frost
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 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 Stillman Valley compares
About 174 days separate Stillman Valley's last and first frost, putting it 27,551 of 40,283 ZIP codes nationally. Within IL, it ranks 1,255 of 1,548.
Learn more
the frost range covers how to read the range around Stillman Valley's dates instead of trusting one. local microclimates covers what one yard in Stillman Valley can differ from the 61084 normal.