Lynn, IN 47355 Frost Dates
When can you plant in Lynn, IN?
Around 04/21 is the usual last spring frost, about 236 days away. The first fall frost typically arrives around 10/20, about 180 frost-free days later.
Lynn sits in USDA Zone 6a (-10 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 Lynn before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Plant by 04/07 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lynn compares
Lynn's growing season runs about 180 days, ranking 24,966 of 40,283 US ZIP codes measured here, longest to shortest. Within IN, it ranks 501 of 927.
Learn more
zone vs. frost date covers why Zone 6a and Lynn's frost date answer different questions. the frost range covers how to read the range around Lynn's dates instead of trusting one.