Manning, IA 51455 Frost Dates
Frost dates for Manning, IA, ZIP 51455
The last spring frost here typically falls around 04/27, about 242 days from today. The first fall frost typically arrives around 10/11, about 166 frost-free days later.
Manning 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 Manning 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 Manning's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/13 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Manning compares
Manning's growing season runs about 166 days, ranking 30,396 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 462 of 1,042.
Learn more
the frost range explains how to read the range around Manning's dates instead of trusting one, and local microclimates explains what one yard in Manning can differ from the 51455 normal.