Silver Bay, MN 55614 Frost Dates
When can you plant in Silver Bay, MN?
Typically, the last spring freeze lands around 05/15, roughly 260 days out. The first fall frost typically arrives around 10/01, about 137 frost-free days later.
Silver Bay sits in USDA Zone 4a (-30 to -25°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 5 weeks of growing season left in Silver Bay before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Silver Bay's last frost
05/15 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Silver Bay compares
Silver Bay's growing season runs about 137 days, ranking 37,521 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 779 of 943.
Learn more
local microclimates covers what one yard in Silver Bay can differ from the 55614 normal. zone vs. frost date covers why Zone 4a and Silver Bay's frost date answer different questions.