Beaverton, MI 48620 Frost Dates
Frost dates for Beaverton, MI, ZIP 48620
Around 05/09 is the usual last spring frost, about 254 days away. The first fall frost typically arrives around 10/04, about 148 frost-free days later.
Beaverton 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
Zone 6a around Beaverton has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Beaverton's last frost
05/09 is the middle of 30 years of NOAA records, not a promise. Plant by 04/26 and you're betting against frost in roughly 9 years out of 10. 05/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Beaverton compares
Beaverton's growing season runs about 148 days, ranking 35,742 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 845 of 1,153.
Learn more
the frost range explains how to read the range around Beaverton's dates instead of trusting one, and local microclimates explains what one yard in Beaverton can differ from the 48620 normal.