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USDA Hardiness Zone 9a

Frost Dates for 34453 — Inverness, Florida

NOAA 1991–2020 normals from Inverness 3 SE, FL (58 ft), 5 miles southeast.

Updated

In Inverness, the last spring frost (32°F) is around March 3 in half of years and has passed by March 29 in nine years out of ten. The first fall frost comes around December 5, as early as November 15 one year in ten, leaving a typical freeze-free season of 279 days (NOAA, Inverness 3 SE, FL).

Last spring frost
March 3

50% probability

First fall frost
December 5

50% probability

Growing season
279 days

freeze-free, 50%

Hardiness zone
9a

20 to 25°F (-6.7 to -3.9°C) coldest night

First snow
Rare

median, 1991–2020

Last snow
Rare

median, 1991–2020

Winters with snow
0%

0 of 20 observed

Snow per year
0"

NOAA normal

Frost risk by date in Inverness

Half of springs at Inverness 3 SE, FL see their last 32°F night by March 3; only one in ten is past it by January 31, and one in ten still has one after March 29. Planting tender crops after March 14 leaves a 30% risk of a frost on them, after March 21 20%, and after March 29 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 15 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 15, 14 days before the 32°F one. The freeze-free season lasts 279 days in a typical year, shorter than at 67% of the 102 Florida stations; it reaches 317 days one year in ten and falls short of 246 one year in ten. On average 16 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 19, and return around November 22. Nights of 24°F, cold enough to damage hardier plants, come in 68% of winters and 16°F in 4%.

Spring: the chance of another night this cold after the date
Low90%80%70%60%50%40%30%20%10%
36°FFeb 22Mar 2Mar 8Mar 15Mar 19Mar 24Mar 30Apr 4Apr 11
32°FJan 31Feb 12Feb 20Feb 26Mar 3Mar 8Mar 14Mar 21Mar 29
28°F95% of yrsJan 8Jan 20Jan 29Feb 3Feb 11Feb 19Feb 26Mar 3Mar 15
24°F68% of yrsDec 31Jan 8Jan 14Jan 21Jan 28Feb 1Feb 8Feb 19Mar 2
20°F27% of yrstoo rare for a date
16°F4% of yrstoo rare for a date
Fall: the chance the first night this cold has come by the date
Low10%20%30%40%50%60%70%80%90%
36°FNov 3Nov 9Nov 14Nov 18Nov 22Nov 27Dec 1Dec 6Dec 15
32°FNov 15Nov 21Nov 27Dec 1Dec 5Dec 11Dec 18Dec 28Jan 6
28°F95% of yrsNov 26Dec 2Dec 11Dec 20Dec 29Jan 2Jan 7Jan 16Jan 30
24°F68% of yrsDec 5Dec 17Dec 28Jan 1Jan 7Jan 12Jan 18Jan 30Feb 10
20°F27% of yrstoo rare for a date
16°F4% of yrstoo rare for a date

Freeze probabilities 1991–2020 at Inverness 3 SE, FL, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.

Frost risk on any date in 34453 →Compare Inverness with another place →

Weather by month in Inverness

July is the warmest month at Inverness 3 SE, FL, averaging 91°F by day and 71°F at night; January is the coldest at 69°F and 43°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 76% of years and March still brings one in 53% of years.

Warmth for growing adds up to 7,343 growing degree days a year (base 50°F), fewer than at 70% of the 158 Florida stations. 43% of them (3,132) have built up by the end of June, and July adds the most, 953. Precipitation totals 52.4 inches a year, most in August (8.7") and least in November (1.8"); May to September bring 64% of it.

Monthly normals 1991–2020 at Inverness 3 SE, FL
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan69433.091%6232
Feb72462.776%4272
Mar77493.353%2414
Apr82552.77%<1554
May88623.10%0770
Jun90698.10%0889
Jul91717.80%0953
Aug90718.70%0953
Sep89695.80%0867
Oct84612.91%<1696
Nov77521.837%1434
Dec72462.572%4308

Monthly normals 1991–2020 at Inverness 3 SE, FL (58 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.

Compared with the next station

The nearest other station, Brooksville Chin Hill, FL, 17 miles south of Inverness and 182 feet higher, has a last frost 28 days earlier (February 3), a first frost 29 days later (January 3), a season 50 days longer.

Frost dates for 34601 (Brooksville) →

When it snows in Inverness, Florida

Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Inverness 3 SE, FL, 5.2 miles away, so there is no typical first-snow date to plan around.

Planting calendar for 34453

What to do and when, from the 50% frost dates for Inverness, Florida
WhenWhat to do
December 23 – January 6Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
January 6 – January 20Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
February 3 – February 17Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
March 3 onwardTransplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by September 12Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by November 21Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
December 5 onwardPlant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter.

The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.

Where these figures come from

ZIP 34453 is 5 miles from Inverness 3 SE, FL, which stands at 58 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 15 other ZIP codes share the station; its figures are presented in full for 34465 (Beverly Hills). The 2023 USDA Plant Hardiness Zone Map lists ZIP 34453 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.

Frost dates across Florida →

Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.

Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.

ZIP codes measured at the same station

Other zone 9a places in Florida