McCausland, IA 52758 Frost Dates
Frost dates for McCausland, IA, ZIP 52758
Around 04/22 is the usual last spring frost, about 237 days away. The first fall frost typically arrives around 10/16, about 175 frost-free days later.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for McCausland, not a forecast for this year.
What to do before the first frost
Zone 5b around McCausland has about 7 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.
How much risk comes with planting early here
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 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 McCausland compares
McCausland's growing season runs about 175 days, ranking 27,221 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 176 of 1,042.
Learn more
local microclimates explains what one yard in McCausland can differ from the 52758 normal, and zone vs. frost date explains why Zone 5b and McCausland's frost date answer different questions.