Leonard, ND 58057 Frost Dates
When can you plant in Leonard, ND?
The last spring frost here typically falls around 05/06, about 251 days from today. The first fall frost typically arrives around 09/29, about 145 frost-free days later.
Zone 4a (-30 to -25°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 Leonard, not a forecast for this year.
What to do before the first frost
About 5 weeks of growing season left in Leonard 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
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Leonard compares
Leonard's growing season runs about 145 days, ranking 36,282 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 59 of 405.
Learn more
the frost range covers how to read the range around Leonard's dates instead of trusting one. local microclimates covers what one yard in Leonard can differ from the 58057 normal.