Bridger, MT 59014 Frost Dates
59014, near Bridger, MT: the frost window
Around 05/14 is the usual last spring frost, about 259 days away. Fall's first freeze usually shows up around 09/24, roughly 129 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bridger in Zone 5a (-20 to -15°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
Bridger's growing season runs out in roughly 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Bridger's last frost
05/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/30 and only about 1 year in 10 sees frost after that.
Bridger against the rest of the dataset
Bridger's growing season runs about 129 days, ranking 38,476 of 40,283 US ZIP codes measured here, longest to shortest. Within MT, it ranks 139 of 392.
Learn more
Two guides worth reading on 59014: the frost range, on how to read the range around Bridger's dates instead of trusting one, and local microclimates, on what one yard in Bridger can differ from the 59014 normal.