Hingham, MT 59532 Frost Dates
59532, near Hingham, MT: the frost window
The last spring frost here typically falls around 05/24, about 269 days from today. Fall's first freeze usually shows up around 09/15, roughly 114 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hingham in Zone 4a (-30 to -25°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
Hingham's growing season runs out in roughly 3 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/24 isn't a guarantee
05/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/07 and only about 1 year in 10 sees frost after that.
Hingham against the rest of the dataset
About 114 days separate Hingham's last and first frost, putting it 39,379 of 40,283 ZIP codes nationally. Within MT, it ranks 255 of 392.
Learn more
Two guides worth reading on 59532: the frost range, on how to read the range around Hingham's dates instead of trusting one, and local microclimates, on what one yard in Hingham can differ from the 59532 normal.