Truesdale, IA 50592 Frost Dates
Frost dates for Truesdale, IA, ZIP 50592
Typically, the last spring freeze lands around 04/30, roughly 245 days out. The first fall frost typically arrives around 10/05, about 159 frost-free days later.
The USDA Plant Hardiness Zone Map puts Truesdale 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 Truesdale has about 5 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
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/14 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 Truesdale compares
Truesdale's growing season runs about 159 days, ranking 32,813 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 809 of 1,042.
Learn more
zone vs. frost date explains why Zone 5a and Truesdale's frost date answer different questions, and the frost range explains how to read the range around Truesdale's dates instead of trusting one.