Courtenay, ND 58426 Frost Dates
Courtenay, ND: when does the frost end?
Typically, the last spring freeze lands around 05/11, roughly 256 days out. Fall's first freeze usually shows up around 09/28, roughly 139 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 Courtenay, not a forecast for this year.
Stretching the season past the first frost
With roughly 4 weeks until Courtenay's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Courtenay's last frost
05/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/25 and only about 1 year in 10 sees frost after that.
Courtenay against the rest of the dataset
At roughly 139 frost-free days, Courtenay places 37,329 of 40,283 ZIP codes in this dataset. Within ND, it ranks 178 of 405.
Learn more
Before leaning on 58426's figures: the frost range explains how to read the range around Courtenay's dates instead of trusting one, while local microclimates explains what one yard in Courtenay can differ from the 58426 normal.