Frost Dates for 64067 — Lexington, Missouri

Half of springs at Lexington 3E, MO see their last 32°F night by April 8; only one in ten is past it by March 24, and one in ten still has one after April 26. Planting tender crops after April 14 leaves a 30% risk of a frost on them, after April 20 20%, and after April 26 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 82% of the 158 Missouri stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 25 in half of years, as early as October 10 one year in ten, and holds off past November 7 one year in ten. A hard freeze of 28°F follows 9 days later, around November 3; in spring the one-in-ten date for 28°F is April 12, 14 days before the 32°F one. The freeze-free season lasts 197 days in a typical year, longer than at 58% of the 158 Missouri stations; it reaches 217 days one year in ten and falls short of 175 one year in ten. On average 118 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 14 days longer, to about April 22, and return around October 15. Severe cold of 16°F or below comes every winter, usually between December 5 and March 1.

July is the warmest month at Lexington 3E, MO, averaging 88°F by day and 68°F at night; January is the coldest at 38°F and 20°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 75% of years.

Warmth for growing adds up to 4,029 growing degree days a year (base 50°F), fewer than at 51% of the 158 Missouri stations. 36% of them (1,463) have built up by the end of June, and July adds the most, 871. Precipitation totals 43.3 inches a year, most in May (5.6") and least in January (1.8"); May to September bring 57% of it.

The nearest other station, Richmond 3S, MO, 7 miles northwest of Lexington, has a last frost 11 days later (April 19), a first frost 7 days earlier (October 18), a season 17 days shorter.

The first measurable snow (0.1 inch or more) in Lexington usually arrives around December 10, and the last of the season around March 1. Those are the middle dates across the winters of 1991–2020 at Lexington 3E, MO, 0.9 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 38 days after the last snow.

ZIP 64067 is under a mile from Lexington 3E, MO, which stands at 825 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 64067 in zone 6a, the band where the coldest night of the year averaged -10 to -5°F (-23.3 to -20.6°C) over 1991–2020; a zone describes winter lows, not frost dates.