Donnellson, IA 52625 Frost Dates
Frost dates for Donnellson, IA, ZIP 52625
Typically, the last spring freeze lands around 04/17, roughly 232 days out. The first fall frost typically arrives around 10/22, about 187 frost-free days later.
Zone 6a (-10 to -5°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 Donnellson, not a forecast for this year.
What to do before the first frost
Zone 6a around Donnellson has about 8 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 Donnellson's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Donnellson compares
Donnellson's growing season runs about 187 days, ranking 22,504 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 18 of 1,042.
Learn more
zone vs. frost date explains why Zone 6a and Donnellson's frost date answer different questions, and the frost range explains how to read the range around Donnellson's dates instead of trusting one.