Frost Dates for 22624 — Clear Brook, Virginia

Half of springs at Winchester 7 SE, VA see their last 32°F night by April 25; only one in ten is past it by April 11, and one in ten still has one after May 13. Planting tender crops after May 2 leaves a 30% risk of a frost on them, after May 6 20%, and after May 13 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 52% of the 128 Virginia stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 18 in half of years, as early as October 5 one year in ten, and holds off past November 1 one year in ten. A hard freeze of 28°F follows 12 days later, around October 30; in spring the one-in-ten date for 28°F is April 27, 16 days before the 32°F one. The freeze-free season lasts 174 days in a typical year, shorter than at 86% of the 128 Virginia stations; it reaches 194 days one year in ten and falls short of 153 one year in ten. On average 126 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 May 6, and return around October 7. Severe cold of 16°F or below comes every winter, usually between December 6 and March 8.

July is the warmest month at Winchester 7 SE, VA, averaging 87°F by day and 63°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 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 33% of years.

Warmth for growing adds up to 3,371 growing degree days a year (base 50°F), fewer than at 73% of the 128 Virginia stations. 34% of them (1,161) have built up by the end of June, and July adds the most, 773. Precipitation totals 39.9 inches a year, most in September (4.4") and least in February (2.2"); May to September bring 50% of it.

The nearest other station, Winchester, VA, 6 miles southwest of Clear Brook, has a last frost 14 days earlier (April 11), a first frost 11 days later (October 29), a season 26 days longer.

The first measurable snow (0.1 inch or more) in Clear Brook usually arrives around December 25, and the last of the season around March 4. Those are the middle dates across the winters of 1991–2020 at Winchester 7 SE, VA, 5.9 miles away: half of years saw snow earlier, half later. Snow fell in 96% of those winters. The last 32°F night of spring typically comes 52 days after the last snow.

ZIP 22624 is 6 miles from Winchester 7 SE, VA, which stands at 680 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 22611 (Berryville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 22624 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.