Frost Dates for 64152 — Parkville, Missouri

Half of springs at Kansas City International Airport, MO see their last 32°F night by April 13; only one in ten is past it by March 30, and one in ten still has one after April 29. Planting tender crops after April 20 leaves a 30% risk of a frost on them, after April 24 20%, and after April 29 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 35% of the 158 Missouri stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 24 in half of years, as early as October 9 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 8 days later, around November 1; in spring the one-in-ten date for 28°F is April 18, 11 days before the 32°F one. The freeze-free season lasts 193 days in a typical year, shorter than at 55% of the 158 Missouri stations; it reaches 212 days one year in ten and falls short of 171 one year in ten. On average 107 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 24, and return around October 14. Severe cold of 16°F or below comes every winter, usually between November 30 and March 4.

July is the warmest month at Kansas City International Airport, 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 84% of years.

Warmth for growing adds up to 4,025 growing degree days a year (base 50°F), fewer than at 52% of the 158 Missouri stations. 36% of them (1,467) have built up by the end of June, and July adds the most, 874. Precipitation totals 39.5 inches a year, most in May (5.3") and least in January (1.2"); May to September bring 59% of it.

The nearest other station, Kansas City Downtown Airport, MO, 9 miles southeast of Parkville and 263 feet lower, has a last frost 9 days earlier (April 4), a first frost 9 days later (November 2), a season 18 days longer.

The first measurable snow (0.1 inch or more) in Parkville usually arrives around December 1, and the last of the season around March 18. Those are the middle dates across the winters of 1991–2020 at Kansas City International Airport, MO, 5.8 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 26 days after the last snow.

ZIP 64152 is 6 miles from Kansas City International Airport, MO, which stands at 1,005 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 64152 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.