Watford City, ND 58634 Frost Dates
Watford City, ND: when does the frost end?
Typically, the last spring freeze lands around 05/18, roughly 263 days out. Fall's first freeze usually shows up around 09/23, roughly 125 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Watford City 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
With roughly 4 weeks until Watford City's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Watford City's last frost
05/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/01 and only about 1 year in 10 sees frost after that.
Watford City against the rest of the dataset
About 125 days separate Watford City's last and first frost, putting it 38,758 of 40,283 ZIP codes nationally. Within ND, it ranks 359 of 405.
Learn more
Before leaning on 58634's figures: local microclimates explains what one yard in Watford City can differ from the 58634 normal, while zone vs. frost date explains why Zone 4a and Watford City's frost date answer different questions.