Frost Dates for 65631 — Clever, Missouri

Half of springs at Billings 1SW, MO see their last 32°F night by April 15; only one in ten is past it by March 30, and one in ten still has one after May 2. Planting tender crops after April 22 leaves a 30% risk of a frost on them, after April 27 20%, and after May 2 10%. The 17 days between the even-odds date and the one-in-ten date is wider than at 66% of the 158 Missouri stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 23 in half of years, as early as October 11 one year in ten, and holds off past November 4 one year in ten. A hard freeze of 28°F follows 9 days later, around November 1; in spring the one-in-ten date for 28°F is April 19, 13 days before the 32°F one. The freeze-free season lasts 189 days in a typical year, shorter than at 67% of the 158 Missouri stations; it reaches 211 days one year in ten and falls short of 170 one year in ten. On average 112 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 13 days longer, to about April 28, and return around October 14. Severe cold of 16°F or below comes every winter, usually between December 1 and March 3.

July is the warmest month at Billings 1SW, MO, averaging 90°F by day and 67°F at night; January is the coldest at 45°F and 22°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 84% of years and May still brings one in 12% of years.

Warmth for growing adds up to 4,165 growing degree days a year (base 50°F), more than at 63% of the 158 Missouri stations. 36% of them (1,512) have built up by the end of June, and July adds the most, 871. Precipitation totals 45.7 inches a year, most in May (5.6") and least in February (2.4"); May to September bring 49% of it.

The nearest other station, Ozark, MO, 11 miles east of Clever and 176 feet lower, has the same 50% last-frost date, the same first-frost date.

The first measurable snow (0.1 inch or more) in Clever usually arrives around December 9, and the last of the season around February 26. Those are the middle dates across the winters of 1991–2020 at Billings 1SW, MO, 8.1 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 48 days after the last snow.

ZIP 65631 is 8 miles from Billings 1SW, MO, which stands at 1,310 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 65738 (Republic). The 2023 USDA Plant Hardiness Zone Map lists ZIP 65631 in zone 6b, the band where the coldest night of the year averaged -5 to 0°F (-20.6 to -17.8°C) over 1991–2020; a zone describes winter lows, not frost dates.