Red Lodge, MT 59028 Frost Dates
When can you plant in Red Lodge, MT?
Around 06/01 is the usual last spring frost, about 277 days away. The first fall frost typically arrives around 09/11, about 100 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
About 2 weeks of growing season left in Red Lodge before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Red Lodge's last frost
06/01 is the middle of 30 years of NOAA records, not a promise. Plant by 05/15 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 100 frost-free days, Red Lodge places 39,712 of 40,283 ZIP codes in this dataset. Within MT, it ranks 309 of 392.
Learn more
zone vs. frost date covers why Zone 5a and Red Lodge's frost date answer different questions. the frost range covers how to read the range around Red Lodge's dates instead of trusting one.