Pinesdale, MT 59875 Frost Dates
When can you plant in Pinesdale, MT?
The last spring frost here typically falls around 05/23, about 268 days from today. The first fall frost typically arrives around 09/21, about 118 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 Pinesdale, not a forecast for this year.
What to do before the first frost
About 3 weeks of growing season left in Pinesdale before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/23 is the middle of 30 years of NOAA records, not a promise. Plant by 05/08 and you're betting against frost in roughly 9 years out of 10. 06/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Pinesdale compares
At roughly 118 frost-free days, Pinesdale places 39,216 of 40,283 ZIP codes in this dataset. Within MT, it ranks 230 of 392.
Learn more
the frost range covers how to read the range around Pinesdale's dates instead of trusting one. local microclimates covers what one yard in Pinesdale can differ from the 59875 normal.