Eagle River, WI 49969 Frost Dates
Frost dates for Eagle River, WI, ZIP 49969
The last spring frost here typically falls around 05/31, about 276 days from today. The first fall frost typically arrives around 09/19, about 111 frost-free days later.
Eagle River sits in USDA Zone 4b (-25 to -20°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
Zone 4b around Eagle River has about 3 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 Eagle River's last frost
05/31 is the middle of 30 years of NOAA records, not a promise. Plant by 05/16 and you're betting against frost in roughly 9 years out of 10. 06/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Eagle River compares
About 111 days separate Eagle River's last and first frost, putting it 39,464 of 40,283 ZIP codes nationally. Within WI, it ranks 854 of 860.
Learn more
the frost range explains how to read the range around Eagle River's dates instead of trusting one, and local microclimates explains what one yard in Eagle River can differ from the 49969 normal.