Beulah, ND 58523 Frost Dates
When can you plant in Beulah, ND?
Around 05/21 is the usual last spring frost, about 266 days away. The first fall frost typically arrives around 09/20, about 121 frost-free days later.
Beulah sits in USDA Zone 4a (-30 to -25°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 3 weeks of growing season left in Beulah before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/21 isn't a guarantee
05/21 is the middle of 30 years of NOAA records, not a promise. Plant by 05/07 and you're betting against frost in roughly 9 years out of 10. 06/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Beulah compares
Beulah's growing season runs about 121 days, ranking 39,006 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 381 of 405.
Learn more
zone vs. frost date covers why Zone 4a and Beulah's frost date answer different questions. the frost range covers how to read the range around Beulah's dates instead of trusting one.