Greene, IA 50636 Frost Dates
Frost dates for Greene, IA, ZIP 50636
Typically, the last spring freeze lands around 04/30, roughly 245 days out. The first fall frost typically arrives around 10/06, about 157 frost-free days later.
Greene sits in USDA Zone 5a (-20 to -15°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 5a around Greene 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.
The actual range around Greene's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Greene compares
About 157 days separate Greene's last and first frost, putting it 33,382 of 40,283 ZIP codes nationally. Within IA, it ranks 839 of 1,042.
Learn more
zone vs. frost date explains why Zone 5a and Greene's frost date answer different questions, and the frost range explains how to read the range around Greene's dates instead of trusting one.