Tennyson, WI 53820 Frost Dates
Frost dates for Tennyson, WI, ZIP 53820
Around 04/27 is the usual last spring frost, about 242 days away. The first fall frost typically arrives around 10/11, about 166 frost-free days later.
The USDA Plant Hardiness Zone Map puts Tennyson in Zone 5a (-20 to -15°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
Zone 5a around Tennyson has about 6 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 Tennyson's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 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 Tennyson compares
At roughly 166 frost-free days, Tennyson places 30,442 of 40,283 ZIP codes in this dataset. Within WI, it ranks 188 of 860.
Learn more
the frost range explains how to read the range around Tennyson's dates instead of trusting one, and local microclimates explains what one yard in Tennyson can differ from the 53820 normal.