Towner, ND 58788 Frost Dates
Towner, ND: when does the frost end?
The last spring frost here typically falls around 05/17, about 262 days from today. Fall's first freeze usually shows up around 09/22, roughly 126 days after the last spring frost.
Zone 3b (-35 to -30°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 Towner, not a forecast for this year.
Stretching the season past the first frost
With roughly 4 weeks until Towner's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/17 isn't a guarantee
05/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/05 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.
Towner against the rest of the dataset
About 126 days separate Towner's last and first frost, putting it 38,712 of 40,283 ZIP codes nationally. Within ND, it ranks 357 of 405.
Learn more
Before leaning on 58788's figures: zone vs. frost date explains why Zone 3b and Towner's frost date answer different questions, while the frost range explains how to read the range around Towner's dates instead of trusting one.