Birch Run, MI 48415 Frost Dates
When can you plant in Birch Run, MI?
Around 05/03 is the usual last spring frost, about 248 days away. The first fall frost typically arrives around 10/12, about 161 frost-free days later.
Birch Run 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 6 weeks of growing season left in Birch Run before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Birch Run's last frost
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Birch Run compares
Birch Run's growing season runs about 161 days, ranking 32,080 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 581 of 1,153.
Learn more
local microclimates covers what one yard in Birch Run can differ from the 48415 normal. zone vs. frost date covers why Zone 6a and Birch Run's frost date answer different questions.