Frost Dates for 64776 — Osceola, Missouri

Half of springs at Osceola, MO see their last 32°F night by April 16; only one in ten is past it by March 31, and one in ten still has one after May 3. Planting tender crops after April 23 leaves a 30% risk of a frost on them, after April 27 20%, and after May 3 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 24 in half of years, as early as October 10 one year in ten, and holds off past November 3 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 21, 12 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 210 days one year in ten and falls short of 169 one year in ten. On average 97 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 27, and return around October 13. Severe cold of 16°F or below comes every winter, usually between November 30 and March 3.

July is the warmest month at Osceola, MO, averaging 90°F by day and 68°F at night; January is the coldest at 42°F and 21°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 86% of years and May still brings one in 13% of years.

Warmth for growing adds up to 4,274 growing degree days a year (base 50°F), more than at 78% of the 158 Missouri stations. 37% of them (1,573) have built up by the end of June, and July adds the most, 905. Precipitation totals 43.2 inches a year, most in May (5.5") and least in January (1.9"); May to September bring 53% of it.

The nearest other station, Truman Dam & Rsvr, MO, 21 miles northeast of Osceola, has a last frost 9 days earlier (April 7), a first frost 6 days later (October 30), a season 16 days longer.

The first measurable snow (0.1 inch or more) in Osceola usually arrives around December 5, and the last of the season around February 20. Those are the middle dates across the winters of 1991–2020 at Osceola, MO, 1.6 miles away: half of years saw snow earlier, half later. Snow fell in 90% of those winters. The last 32°F night of spring typically comes 55 days after the last snow.

ZIP 64776 is 2 miles from Osceola, MO, which stands at 744 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 64776 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.