Frost Dates for 64080 — Pleasant Hill, Missouri

Half of springs at Pleasant Hill WFO, 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 23. Planting tender crops after April 13 leaves a 30% risk of a frost on them, after April 18 20%, and after April 23 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 54% of the 158 Missouri stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 29 in half of years, as early as October 16 one year in ten, and holds off past November 12 one year in ten. A hard freeze of 28°F follows 9 days later, around November 7; in spring the one-in-ten date for 28°F is April 12, 11 days before the 32°F one. The freeze-free season lasts 204 days in a typical year, longer than at 79% of the 158 Missouri stations; it reaches 224 days one year in ten and falls short of 182 one year in ten. On average 106 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 11 days longer, to about April 19, and return around October 19. Severe cold of 16°F or below comes every winter, usually between December 6 and March 2.

July is the warmest month at Pleasant Hill WFO, MO, averaging 88°F by day and 69°F at night; January is the coldest at 39°F and 21°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 73% of years.

Warmth for growing adds up to 4,088 growing degree days a year (base 50°F), more than at 54% of the 158 Missouri stations. 36% of them (1,478) have built up by the end of June, and July adds the most, 882. Precipitation totals 42.7 inches a year, most in May (5.8") and least in January (1.4"); May to September bring 58% of it.

The nearest other station, Lees Summit Reed Wr, MO, 8 miles northwest of Pleasant Hill, has a last frost 5 days later (April 13), a first frost 3 days earlier (October 26), a season 10 days shorter.

The first measurable snow (0.1 inch or more) in Pleasant Hill usually arrives around December 7, and the last of the season around March 12. Those are the middle dates across the winters of 1991–2020 at Pleasant Hill WFO, MO, 2.3 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 27 days after the last snow.

ZIP 64080 is 2 miles from Pleasant Hill WFO, MO, which stands at 1,000 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 64701 (Harrisonville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 64080 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.