Hamilton, ND 58236 Frost Dates
When can you plant in Hamilton, ND?
The last spring frost here typically falls around 05/12, about 257 days from today. The first fall frost typically arrives around 09/30, about 139 frost-free days later.
Hamilton 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 5 weeks of growing season left in Hamilton before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/12 is the middle of 30 years of NOAA records, not a promise. Plant by 04/29 and you're betting against frost in roughly 9 years out of 10. 05/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hamilton compares
At roughly 139 frost-free days, Hamilton places 37,326 of 40,283 ZIP codes in this dataset. Within ND, it ranks 175 of 405.
Learn more
local microclimates covers what one yard in Hamilton can differ from the 58236 normal. zone vs. frost date covers why Zone 4a and Hamilton's frost date answer different questions.