Frost Dates for 47396 — Yorktown, Indiana

Half of springs at Muncie Delaware Co Airport, IN see their last 32°F night by April 16; only one in ten is past it by April 1, and one in ten still has one after May 2. Planting tender crops after April 22 leaves a 30% risk of a frost on them, after April 26 20%, and after May 2 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 35% of the 125 Indiana stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 25 in half of years, as early as October 9 one year in ten, and holds off past November 6 one year in ten. A hard freeze of 28°F follows 11 days later, around November 5; in spring the one-in-ten date for 28°F is April 19, 13 days before the 32°F one. The freeze-free season lasts 190 days in a typical year, longer than at 70% of the 125 Indiana stations; it reaches 211 days one year in ten and falls short of 168 one year in ten. On average 119 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 28, and return around October 12. Severe cold of 16°F or below comes every winter, usually between December 10 and March 4.

July is the warmest month at Muncie Delaware Co Airport, IN, averaging 86°F by day and 66°F at night; January is the coldest at 36°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 90% of years and May still brings one in 13% of years.

Warmth for growing adds up to 3,753 growing degree days a year (base 50°F), more than at 74% of the 125 Indiana stations. 37% of them (1,399) have built up by the end of June, and July adds the most, 807. Precipitation totals 40.4 inches a year, most in June (4.8") and least in February (2.3"); May to September bring 49% of it.

The nearest other station, Anderson Sewage Plt, IN, 12 miles southwest of Yorktown, has a last frost 3 days later (April 19), a first frost 2 days earlier (October 23), a season 4 days shorter.

The first measurable snow (0.1 inch or more) in Yorktown usually arrives around December 8, and the last of the season around March 14. Those are the middle dates across the winters of 1991–2020 at Muncie, IN, 8.2 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 33 days after the last snow.

ZIP 47396 is 7 miles from Muncie Delaware Co Airport, IN, which stands at 937 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 7 other ZIP codes share the station; its figures are presented in full for 47304 (Muncie). The 2023 USDA Plant Hardiness Zone Map lists ZIP 47396 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.