Frost Dates for 65355 — Warsaw, Missouri

Half of springs at Truman Dam & Rsvr, MO see their last 32°F night by April 7; only one in ten is past it by March 21, and one in ten still has one after April 22. Planting tender crops after April 13 leaves a 30% risk of a frost on them, after April 16 20%, and after April 22 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 30 in half of years, as early as October 16 one year in ten, and holds off past November 13 one year in ten. A hard freeze of 28°F follows 11 days later, around November 10; in spring the one-in-ten date for 28°F is April 11, 11 days before the 32°F one. The freeze-free season lasts 205 days in a typical year, longer than at 83% of the 158 Missouri stations; it reaches 226 days one year in ten and falls short of 184 one year in ten. On average 105 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 12 days longer, to about April 19, and return around October 21. Severe cold of 16°F or below comes every winter, usually between December 15 and February 27.

July is the warmest month at Truman Dam & Rsvr, MO, averaging 90°F by day and 69°F at night; January is the coldest at 43°F and 22°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 71% of years.

Warmth for growing adds up to 4,299 growing degree days a year (base 50°F), more than at 82% of the 158 Missouri stations. 36% of them (1,544) have built up by the end of June, and July adds the most, 916. Precipitation totals 43.6 inches a year, most in May (5.5") and least in January (1.8"); May to September bring 54% of it.

The nearest other station, Cole Camp 3NW, MO, 18 miles north of Warsaw and 246 feet higher, has a last frost 6 days later (April 13), a first frost 7 days earlier (October 23), a season 14 days shorter.

The first measurable snow (0.1 inch or more) in Warsaw usually arrives around December 10, and the last of the season around February 24. Those are the middle dates across the winters of 1991–2020 at Windsor, MO, 21.8 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 42 days after the last snow.

ZIP 65355 is 3 miles from Truman Dam & Rsvr, MO, which stands at 754 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 65355 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.