Frost Dates for 58763 — New Town, North Dakota

Half of springs at Keene 3S, ND see their last 32°F night by May 20; only one in ten is past it by May 8, and one in ten still has one after June 2. Planting tender crops after May 25 leaves a 30% risk of a frost on them, after May 28 20%, and after June 2 10%. The 13 days between the even-odds date and the one-in-ten date is narrower than at 21% of the 33 North Dakota stations behind this site's ZIP pages.

In fall the first 32°F night comes by September 20 in half of years, as early as September 5 one year in ten, and holds off past October 2 one year in ten. A hard freeze of 28°F follows 8 days later, around September 28; in spring the one-in-ten date for 28°F is May 24, 9 days before the 32°F one. The freeze-free season lasts 121 days in a typical year, the shortest of the 33 North Dakota stations; it reaches 140 days one year in ten and falls short of 101 one year in ten. On average 185 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 10 days longer, to about May 30, and return around September 11. Severe cold of 16°F or below comes every winter, usually between October 28 and April 9.

July is the warmest month at Keene 3S, ND, averaging 83°F by day and 55°F at night; January is the coldest at 22°F and 4°F. A freezing night is all but certain in every month from October to May (a 90% chance or more). From July to August the chance of a 32°F night stays under 10% each month. In spring, June still brings one in 13% of years.

Warmth for growing adds up to 2,176 growing degree days a year (base 50°F), more than at 52% of the 33 North Dakota stations. 29% of them (631) have built up by the end of June, and July adds the most, 595. Precipitation totals 18.0 inches a year, most in June (3.3") and least in January (0.5"); May to September bring 69% of it.

The nearest other station, Stanley 3 NNW, ND, 26 miles north of New Town and 190 feet lower, has a last frost 3 days earlier (May 17), a first frost 3 days later (September 23), a season 6 days longer.

The first measurable snow (0.1 inch or more) in New Town usually arrives around October 31, and the last of the season around March 27. Those are the middle dates across the winters of 1991–2020 at Keene 3S, ND, 18.6 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 54 days after the last snow.

ZIP 58763 is 19 miles from Keene 3S, ND, which stands at 2,470 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 58763 in zone 4a, the band where the coldest night of the year averaged -30 to -25°F (-34.4 to -31.7°C) over 1991–2020; a zone describes winter lows, not frost dates.