Flasher, ND 58535 Frost Dates
Flasher, ND: when does the frost end?
Around 05/13 is the usual last spring frost, about 258 days away. Fall's first freeze usually shows up around 09/27, roughly 135 days after the last spring frost.
Zone 4a (-30 to -25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Flasher, not a forecast for this year.
Stretching the season past the first frost
With roughly 4 weeks until Flasher's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Flasher's last frost
05/13 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 05/28 and only about 1 year in 10 sees frost after that.
Flasher against the rest of the dataset
At roughly 135 frost-free days, Flasher places 37,919 of 40,283 ZIP codes in this dataset. Within ND, it ranks 262 of 405.
Learn more
Before leaning on 58535's figures: local microclimates explains what one yard in Flasher can differ from the 58535 normal, while zone vs. frost date explains why Zone 4a and Flasher's frost date answer different questions.