Frost Dates for 43019 — Fredericktown, Ohio

Half of springs at Fredericktown 4 S, OH see their last 32°F night by May 1; only one in ten is past it by April 18, and one in ten still has one after May 18. Planting tender crops after May 7 leaves a 30% risk of a frost on them, after May 12 20%, and after May 18 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 24% of the 148 Ohio stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 10 in half of years, as early as September 27 one year in ten, and holds off past October 24 one year in ten. A hard freeze of 28°F follows 13 days later, around October 23; in spring the one-in-ten date for 28°F is May 6, 12 days before the 32°F one. The freeze-free season lasts 161 days in a typical year, shorter than at 96% of the 148 Ohio stations; it reaches 181 days one year in ten and falls short of 139 one year in ten. On average 148 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 9 days longer, to about May 10, and return around September 30. Severe cold of 16°F or below comes every winter, usually between November 21 and March 19.

July is the warmest month at Fredericktown 4 S, OH, averaging 82°F by day and 59°F at night; January is the coldest at 33°F and 15°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 51% of years.

Warmth for growing adds up to 2,602 growing degree days a year (base 50°F), fewer than at 97% of the 148 Ohio stations. 35% of them (917) have built up by the end of June, and July adds the most, 629.

The nearest other station, Danville 2 W, OH, 14 miles east of Fredericktown, has a last frost 1 day later (May 2), a first frost 2 days earlier (October 8), a season 4 days shorter.

The first measurable snow (0.1 inch or more) in Fredericktown usually arrives around November 24, and the last of the season around April 5. Those are the middle dates across the winters of 1991–2020 at Danville 2 W, OH, 14.5 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 43019 is 6 miles from Fredericktown 4 S, OH, which stands at 1,050 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 43050 (Mount Vernon). The 2023 USDA Plant Hardiness Zone Map lists ZIP 43019 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.