Frost Dates for 25411 — Berkeley Springs, West Virginia

Half of springs at Cacapon St Pk #2, WV see their last 32°F night by April 23; only one in ten is past it by April 6, and one in ten still has one after May 13. Planting tender crops after May 1 leaves a 30% risk of a frost on them, after May 6 20%, and after May 13 10%. The 20 days between the even-odds date and the one-in-ten date is wider than at 79% of the 84 West Virginia stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 21 in half of years, as early as October 6 one year in ten, and holds off past November 2 one year in ten. A hard freeze of 28°F follows 11 days later, around November 1; in spring the one-in-ten date for 28°F is April 30, 13 days before the 32°F one. The freeze-free season lasts 180 days in a typical year, longer than at 52% of the 84 West Virginia stations; it reaches 201 days one year in ten and falls short of 155 one year in ten. On average 122 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 13 days longer, to about May 6, and return around October 10. Severe cold of 16°F or below comes every winter, usually between December 8 and March 7.

July is the warmest month at Cacapon St Pk #2, WV, averaging 85°F by day and 62°F at night; January is the coldest at 40°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 30% of years.

Warmth for growing adds up to 3,173 growing degree days a year (base 50°F), fewer than at 63% of the 84 West Virginia stations. 35% of them (1,114) have built up by the end of June, and July adds the most, 733. Precipitation totals 42.8 inches a year, most in June (4.9") and least in February (2.2"); May to September bring 50% of it.

The nearest other station, Martinsburg 2, WV, 16 miles southeast of Berkeley Springs and 498 feet lower, has a last frost 6 days earlier (April 17), a first frost 2 days later (October 23), a season 7 days longer.

The first measurable snow (0.1 inch or more) in Berkeley Springs usually arrives around December 19, and the last of the season around March 4. Those are the middle dates across the winters of 1991–2020 at Cacapon St Pk #2, WV, 5.5 miles away: half of years saw snow earlier, half later. Snow fell in 97% of those winters. The last 32°F night of spring typically comes 50 days after the last snow.

ZIP 25411 is 6 miles from Cacapon St Pk #2, WV, which stands at 958 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 25411 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.