Hawley, MN 56549 Frost Dates
Frost dates for Hawley, MN, ZIP 56549
The last spring frost here typically falls around 05/05, about 250 days from today. The first fall frost typically arrives around 10/03, about 150 frost-free days later.
Zone 4a (-30 to -25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Hawley, not a forecast for this year.
What to do before the first frost
Zone 4a around Hawley 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.
How much risk comes with planting early here
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 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 Hawley compares
Hawley's growing season runs about 150 days, ranking 35,301 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 518 of 943.
Learn more
local microclimates explains what one yard in Hawley can differ from the 56549 normal, and zone vs. frost date explains why Zone 4a and Hawley's frost date answer different questions.