Thompsonville, IL 62890 Frost Dates
When can you plant in Thompsonville, IL?
Around 04/04 is the usual last spring frost, about 219 days away. The first fall frost typically arrives around 10/28, about 206 frost-free days later.
Thompsonville sits in USDA Zone 6b (-5 to 0°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 9 weeks of growing season left in Thompsonville 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
04/04 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 Thompsonville compares
About 206 days separate Thompsonville's last and first frost, putting it 16,099 of 40,283 ZIP codes nationally. Within IL, it ranks 99 of 1,548.
Learn more
the frost range covers how to read the range around Thompsonville's dates instead of trusting one. local microclimates covers what one yard in Thompsonville can differ from the 62890 normal.