Frost Dates for 32063 — Macclenny, Florida

Half of springs at Glen St Mary 1 W, FL see their last 32°F night by March 8; only one in ten is past it by February 6, and one in ten still has one after March 31. Planting tender crops after March 18 leaves a 30% risk of a frost on them, after March 23 20%, and after March 31 10%. The 23 days between the even-odds date and the one-in-ten date is narrower than at 60% of the 101 Florida stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

In fall the first 32°F night comes by December 1 in half of years, as early as November 9 one year in ten, and holds off past December 28 one year in ten. A hard freeze of 28°F follows 20 days later, around December 21; in spring the one-in-ten date for 28°F is March 16, 15 days before the 32°F one. The freeze-free season lasts 272 days in a typical year, shorter than at 76% of the 102 Florida stations; it reaches 309 days one year in ten and falls short of 238 one year in ten. On average 28 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 16 days longer, to about March 24, and return around November 17. Nights of 24°F, cold enough to damage hardier plants, come in 75% of winters and 16°F in 6%.

July is the warmest month at Glen St Mary 1 W, FL, averaging 93°F by day and 71°F at night; January is the coldest at 67°F and 40°F. A freezing night is all but certain in January (a 90% chance or more). From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 81% of years and March still brings one in 62% of years.

Warmth for growing adds up to 7,028 growing degree days a year (base 50°F), fewer than at 80% of the 158 Florida stations. 42% of them (2,952) have built up by the end of June, and July adds the most, 992. Precipitation totals 53.2 inches a year, most in June (8.4") and least in November (1.9"); May to September bring 58% of it.

The nearest other station, Jackson Whitehouse Nolf, FL, 15 miles east of Macclenny, has a last frost 8 days earlier (February 28), a first frost 2 days later (December 3), a season 8 days longer.

Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Glen St Mary 1 W, FL, 3.7 miles away, so there is no typical first-snow date to plan around.

ZIP 32063 is 4 miles from Glen St Mary 1 W, FL, which stands at 128 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 32063 in zone 9a, the band where the coldest night of the year averaged 20 to 25°F (-6.7 to -3.9°C) over 1991–2020; a zone describes winter lows, not frost dates.