Frost Dates for 34638 — Land O Lakes, Florida

Half of springs at Brooksville Hernando Co Airport, FL see their last 32°F night by March 1; only one in ten is past it by January 30, and one in ten still has one after March 27. Planting tender crops after March 12 leaves a 30% risk of a frost on them, after March 18 20%, and after March 27 10%. The 26 days between the even-odds date and the one-in-ten date is wider than at 52% 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 5 in half of years, as early as November 11 one year in ten, and holds off past January 6 one year in ten. A hard freeze of 28°F follows 24 days later, around December 29; in spring the one-in-ten date for 28°F is March 12, 15 days before the 32°F one. The freeze-free season lasts 281 days in a typical year, shorter than at 63% of the 102 Florida stations; it reaches 317 days one year in ten and falls short of 244 one year in ten. On average 14 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 17, and return around November 21. Nights of 24°F, cold enough to damage hardier plants, come in 64% of winters and 16°F in 6%.

August is the warmest month at Brooksville Hernando Co Airport, FL, averaging 91°F by day and 72°F at night; January is the coldest at 71°F and 44°F. From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 76% of years and March still brings one in 49% of years.

Warmth for growing adds up to 7,646 growing degree days a year (base 50°F), fewer than at 64% of the 158 Florida stations. 43% of them (3,291) have built up by the end of June, and August adds the most, 977. Precipitation totals 52.1 inches a year, most in July (9.4") and least in November (1.6"); May to September bring 66% of it.

The nearest other station, Tarpon Spgs Sewage Plt, FL, 16 miles southwest of Land O Lakes, has a last frost 40 days earlier (January 20), a first frost 35 days later (January 9), a season 73 days longer.

Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Tarpon Spgs Sewage Plt, FL, 16.4 miles away, so there is no typical first-snow date to plan around.

ZIP 34638 is 15 miles from Brooksville Hernando Co Airport, FL, which stands at 77 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 34609 (Spring Hill). The 2023 USDA Plant Hardiness Zone Map lists ZIP 34638 in zone 9b, the band where the coldest night of the year averaged 25 to 30°F (-3.9 to -1.1°C) over 1991–2020; a zone describes winter lows, not frost dates.