Alamo, ND 58830 Frost Dates
When can you plant in Alamo, ND?
Around 05/18 is the usual last spring frost, about 263 days away. The first fall frost typically arrives around 09/20, about 124 frost-free days later.
The USDA Plant Hardiness Zone Map puts Alamo in Zone 3b (-35 to -30°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 3 weeks of growing season left in Alamo before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Alamo's last frost
05/18 is the middle of 30 years of NOAA records, not a promise. Plant by 05/06 and you're betting against frost in roughly 9 years out of 10. 05/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Alamo compares
Alamo's growing season runs about 124 days, ranking 38,877 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 370 of 405.
Learn more
local microclimates covers what one yard in Alamo can differ from the 58830 normal. zone vs. frost date covers why Zone 3b and Alamo's frost date answer different questions.