Anna, IL 62906 Frost Dates
When can you plant in Anna, IL?
Typically, the last spring freeze lands around 04/09, roughly 224 days out. The first fall frost typically arrives around 10/22, about 195 frost-free days later.
Anna sits in USDA Zone 7a (0 to 5°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 8 weeks of growing season left in Anna before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Anna's last frost
04/09 is the middle of 30 years of NOAA records, not a promise. Plant by 03/25 and you're betting against frost in roughly 9 years out of 10. 04/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Anna compares
Anna's growing season runs about 195 days, ranking 19,263 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 338 of 1,548.
Learn more
zone vs. frost date covers why Zone 7a and Anna's frost date answer different questions. the frost range covers how to read the range around Anna's dates instead of trusting one.