Reedsburg, WI 53959 Frost Dates
When can you plant in Reedsburg, WI?
Around 05/02 is the usual last spring frost, about 247 days away. The first fall frost typically arrives around 10/07, about 156 frost-free days later.
Reedsburg sits in USDA Zone 5a (-20 to -15°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 6 weeks of growing season left in Reedsburg before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Reedsburg's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/18 and you're betting against frost in roughly 9 years out of 10. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Reedsburg compares
About 156 days separate Reedsburg's last and first frost, putting it 33,548 of 40,283 ZIP codes nationally. Within WI, it ranks 411 of 860.
Learn more
zone vs. frost date covers why Zone 5a and Reedsburg's frost date answer different questions. the frost range covers how to read the range around Reedsburg's dates instead of trusting one.