Jordan, MT 59322 Frost Dates
Frost dates for Jordan, MT, ZIP 59322
The last spring frost here typically falls around 05/25, about 270 days from today. The first fall frost typically arrives around 09/14, about 110 frost-free days later.
The USDA Plant Hardiness Zone Map puts Jordan in Zone 4a (-30 to -25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 4a around Jordan has about 2 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.
Why 05/25 isn't a guarantee
05/25 is the middle of 30 years of NOAA records, not a promise. Plant by 05/12 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 Jordan compares
At roughly 110 frost-free days, Jordan places 39,514 of 40,283 ZIP codes in this dataset. Within MT, it ranks 278 of 392.
Learn more
the frost range explains how to read the range around Jordan's dates instead of trusting one, and local microclimates explains what one yard in Jordan can differ from the 59322 normal.