Windsor Heights, IA 50312 Frost Dates
Frost dates for Windsor Heights, IA, ZIP 50312
The last spring frost here typically falls around 04/18, about 233 days from today. The first fall frost typically arrives around 10/20, about 184 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 Windsor Heights, not a forecast for this year.
What to do before the first frost
Zone 5b around Windsor Heights 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.
How much risk comes with planting early here
04/18 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. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Windsor Heights compares
Windsor Heights's growing season runs about 184 days, ranking 23,504 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 66 of 1,042.
Learn more
zone vs. frost date explains why Zone 5b and Windsor Heights's frost date answer different questions, and the frost range explains how to read the range around Windsor Heights's dates instead of trusting one.