Belgrade, MT 59714 Frost Dates
Belgrade, MT: when does the frost end?
Typically, the last spring freeze lands around 05/26, roughly 271 days out. Fall's first freeze usually shows up around 09/16, roughly 112 days after the last spring frost.
Belgrade sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 3 weeks until Belgrade's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Belgrade's last frost
05/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/12 and only about 1 year in 10 sees frost after that.
Belgrade against the rest of the dataset
At roughly 112 frost-free days, Belgrade places 39,411 of 40,283 ZIP codes in this dataset. Within MT, it ranks 262 of 392.
Learn more
Before leaning on 59714's figures: zone vs. frost date explains why Zone 5a and Belgrade's frost date answer different questions, while the frost range explains how to read the range around Belgrade's dates instead of trusting one.