Tolna, ND 58380 Frost Dates
When can you plant in Tolna, ND?
The last spring frost here typically falls around 05/12, about 257 days from today. The first fall frost typically arrives around 09/28, about 139 frost-free days later.
The USDA Plant Hardiness Zone Map puts Tolna in Zone 4a (-30 to -25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 4 weeks of growing season left in Tolna before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/12 isn't a guarantee
05/12 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Tolna compares
About 139 days separate Tolna's last and first frost, putting it 37,295 of 40,283 ZIP codes nationally. Within ND, it ranks 155 of 405.
Learn more
zone vs. frost date covers why Zone 4a and Tolna's frost date answer different questions. the frost range covers how to read the range around Tolna's dates instead of trusting one.