Slater, IA 50244 Frost Dates
Frost dates for Slater, IA, ZIP 50244
Around 04/26 is the usual last spring frost, about 241 days away. The first fall frost typically arrives around 10/12, about 168 frost-free days later.
Slater sits in USDA Zone 5b (-15 to -10°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 5b around Slater 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.
Why 04/26 isn't a guarantee
04/26 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. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Slater compares
At roughly 168 frost-free days, Slater places 29,727 of 40,283 ZIP codes in this dataset. Within IA, it ranks 373 of 1,042.
Learn more
local microclimates explains what one yard in Slater can differ from the 50244 normal, and zone vs. frost date explains why Zone 5b and Slater's frost date answer different questions.