Frost Dates for 52747 — Durant, Iowa

Half of springs at Muscatine 2N, IA see their last 32°F night by April 18; only one in ten is past it by April 4, and one in ten still has one after May 2. Planting tender crops after April 25 leaves a 30% risk of a frost on them, after April 30 20%, and after May 2 10%. The 14 days between the even-odds date and the one-in-ten date is wider than at 58% of the 132 Iowa stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 22 in half of years, as early as October 8 one year in ten, and holds off past November 2 one year in ten. A hard freeze of 28°F follows 9 days later, around October 31; in spring the one-in-ten date for 28°F is April 23, 9 days before the 32°F one. The freeze-free season lasts 184 days in a typical year, longer than at 89% of the 132 Iowa stations; it reaches 203 days one year in ten and falls short of 165 one year in ten. On average 125 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 12 days longer, to about April 30, and return around October 12. Severe cold of 16°F or below comes every winter, usually between November 27 and March 11.

July is the warmest month at Muscatine 2N, IA, averaging 84°F by day and 64°F at night; January is the coldest at 31°F and 14°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 16% of years.

Warmth for growing adds up to 3,248 growing degree days a year (base 50°F), more than at 79% of the 132 Iowa stations. 35% of them (1,133) have built up by the end of June, and July adds the most, 752. Precipitation totals 38.3 inches a year, most in June (5.4") and least in January (1.4"); May to September bring 58% of it.

The nearest other station, Illinois City Dam 16, IL, 13 miles southwest of Durant, has the same 50% last-frost date, a first frost 2 days later (October 24), a season 4 days longer.

The first measurable snow (0.1 inch or more) in Durant usually arrives around December 1, and the last of the season around March 24. Those are the middle dates across the winters of 1991–2020 at Muscatine 2N, IA, 11.5 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 25 days after the last snow.

ZIP 52747 is 12 miles from Muscatine 2N, IA, which stands at 680 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 52778 (Wilton). The 2023 USDA Plant Hardiness Zone Map lists ZIP 52747 in zone 5b, the band where the coldest night of the year averaged -15 to -10°F (-26.1 to -23.3°C) over 1991–2020; a zone describes winter lows, not frost dates.