Moore, ID 83255 Frost Dates
Frost dates for Moore, ID, ZIP 83255
Around 05/22 is the usual last spring frost, about 267 days away. The first fall frost typically arrives around 09/22, about 119 frost-free days later.
Zone 5a (-20 to -15°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 Moore, not a forecast for this year.
What to do before the first frost
Zone 5a around Moore has about 4 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 Moore's last frost
05/22 is the middle of 30 years of NOAA records, not a promise. Plant by 05/05 and you're betting against frost in roughly 9 years out of 10. 06/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Moore compares
Moore's growing season runs about 119 days, ranking 39,185 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 224 of 320.
Learn more
zone vs. frost date explains why Zone 5a and Moore's frost date answer different questions, and the frost range explains how to read the range around Moore's dates instead of trusting one.