Red Lodge, MT 59071 Frost Dates
Frost dates for Red Lodge, MT, ZIP 59071
The last spring frost here typically falls around 06/05, about 281 days from today. The first fall frost typically arrives around 09/14, about 99 frost-free days later.
The USDA Plant Hardiness Zone Map puts Red Lodge in Zone 5a (-20 to -15°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 5a around Red Lodge 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.
How much risk comes with planting early here
06/05 is the middle of 30 years of NOAA records, not a promise. Plant by 05/22 and you're betting against frost in roughly 9 years out of 10. 06/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Red Lodge compares
At roughly 99 frost-free days, Red Lodge places 39,734 of 40,283 ZIP codes in this dataset. Within MT, it ranks 312 of 392.
Learn more
zone vs. frost date explains why Zone 5a and Red Lodge's frost date answer different questions, and the frost range explains how to read the range around Red Lodge's dates instead of trusting one.