Livingston, MT 59030 Frost Dates
Livingston, MT: when does the frost end?
The last spring frost here typically falls around 05/21, about 266 days from today. Fall's first freeze usually shows up around 09/27, roughly 128 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Livingston in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 4 weeks until Livingston's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/21 isn't a guarantee
05/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/09 and only about 1 year in 10 sees frost after that.
Livingston against the rest of the dataset
Livingston's growing season runs about 128 days, ranking 38,536 of 40,283 US ZIP codes measured here, longest to shortest. Within MT, it ranks 147 of 392.
Learn more
Before leaning on 59030's figures: local microclimates explains what one yard in Livingston can differ from the 59030 normal, while zone vs. frost date explains why Zone 4b and Livingston's frost date answer different questions.