Brownsdale, MN 55918 Frost Dates
Frost dates for Brownsdale, MN, ZIP 55918
The last spring frost here typically falls around 04/30, about 245 days from today. The first fall frost typically arrives around 10/05, about 158 frost-free days later.
Zone 4b (-25 to -20°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 Brownsdale, not a forecast for this year.
What to do before the first frost
Zone 4b around Brownsdale 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
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/14 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Brownsdale compares
Brownsdale's growing season runs about 158 days, ranking 33,096 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 287 of 943.
Learn more
local microclimates explains what one yard in Brownsdale can differ from the 55918 normal, and zone vs. frost date explains why Zone 4b and Brownsdale's frost date answer different questions.