Combined Locks, WI 54113 Frost Dates
When can you plant in Combined Locks, WI?
Around 05/04 is the usual last spring frost, about 249 days away. The first fall frost typically arrives around 10/06, about 154 frost-free days later.
The USDA Plant Hardiness Zone Map puts Combined Locks in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 6 weeks of growing season left in Combined Locks before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 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 Combined Locks compares
At roughly 154 frost-free days, Combined Locks places 34,284 of 40,283 ZIP codes in this dataset. Within WI, it ranks 479 of 860.
Learn more
local microclimates covers what one yard in Combined Locks can differ from the 54113 normal. zone vs. frost date covers why Zone 5b and Combined Locks's frost date answer different questions.