Frost Dates for 45385 — Xenia, Ohio

Half of springs at Xenia 6 SSE, OH see their last 32°F night by April 18; only one in ten is past it by April 3, and one in ten still has one after May 4. Planting tender crops after April 24 leaves a 30% risk of a frost on them, after April 29 20%, and after May 4 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 53% of the 148 Ohio 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 11 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 10 days later, around November 3; in spring the one-in-ten date for 28°F is April 20, 14 days before the 32°F one. The freeze-free season lasts 188 days in a typical year, longer than at 76% of the 148 Ohio stations; it reaches 207 days one year in ten and falls short of 167 one year in ten. On average 104 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 10 days longer, to about April 28, and return around October 12. Severe cold of 16°F or below comes every winter, usually between December 9 and March 6.

July is the warmest month at Xenia 6 SSE, OH, averaging 83°F by day and 65°F at night; January is the coldest at 38°F and 23°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 16% of years.

Warmth for growing adds up to 3,573 growing degree days a year (base 50°F), more than at 82% of the 148 Ohio stations. 37% of them (1,337) have built up by the end of June, and July adds the most, 747. Precipitation totals 43.4 inches a year, most in May (4.8") and least in February (2.7"); May to September bring 45% of it.

The nearest other station, Wilmington 3 N, OH, 14 miles south of Xenia, has a last frost 2 days later (April 20), a first frost 4 days earlier (October 20), a season 8 days shorter.

The first measurable snow (0.1 inch or more) in Xenia usually arrives around December 3, and the last of the season around March 13. Those are the middle dates across the winters of 1991–2020 at Xenia 6 SSE, OH, 5.5 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 36 days after the last snow.

ZIP 45385 is 6 miles from Xenia 6 SSE, OH, which stands at 997 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 45385 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.