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USDA Hardiness Zone 8b

Frost Dates for 36744 — Greensboro, Alabama

NOAA 1991–2020 normals from Greensboro 2 WNW, AL (280 ft), 2 miles northwest.

Updated

In Greensboro, the last spring frost (32°F) is around March 17 in half of years and has passed by April 6 in nine years out of ten. The first fall frost comes around November 11, as early as October 27 one year in ten, leaving a typical freeze-free season of 240 days (NOAA, Greensboro 2 WNW, AL).

Last spring frost
March 17

50% probability

First fall frost
November 11

50% probability

Growing season
240 days

freeze-free, 50%

Hardiness zone
8b

15 to 20°F (-9.4 to -6.7°C) coldest night

First snow
Rare

median, 1991–2020

Last snow
Rare

median, 1991–2020

Winters with snow
5%

1 of 19 observed

Snow per year
0.2"

NOAA normal

Frost risk by date in Greensboro

Half of springs at Greensboro 2 WNW, AL see their last 32°F night by March 17; only one in ten is past it by February 23, and one in ten still has one after April 6. Planting tender crops after March 26 leaves a 30% risk of a frost on them, after March 31 20%, and after April 6 10%. The 20 days between the even-odds date and the one-in-ten date is wider than at 70% of the 115 Alabama stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 11 in half of years, as early as October 27 one year in ten, and holds off past December 3 one year in ten. A hard freeze of 28°F follows 14 days later, around November 25; in spring the one-in-ten date for 28°F is March 21, 16 days before the 32°F one. The freeze-free season lasts 240 days in a typical year, longer than at 64% of the 115 Alabama stations; it reaches 270 days one year in ten and falls short of 213 one year in ten. On average 44 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 17 days longer, to about April 3, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 98% of winters and 16°F in 52%.

Spring: the chance of another night this cold after the date
Low90%80%70%60%50%40%30%20%10%
36°FMar 14Mar 21Mar 26Mar 31Apr 3Apr 6Apr 9Apr 13Apr 20
32°FFeb 23Mar 1Mar 8Mar 13Mar 17Mar 21Mar 26Mar 31Apr 6
28°FFeb 3Feb 13Feb 21Feb 26Mar 1Mar 5Mar 10Mar 15Mar 21
24°F98% of yrsJan 16Jan 28Jan 31Feb 7Feb 14Feb 20Feb 27Mar 3Mar 10
20°F84% of yrsJan 4Jan 12Jan 19Jan 26Jan 31Feb 3Feb 9Feb 18Feb 28
16°F52% of yrsJan 1Jan 8Jan 13Jan 18Jan 24Jan 28Jan 31Feb 4Feb 15
Fall: the chance the first night this cold has come by the date
Low10%20%30%40%50%60%70%80%90%
36°FOct 19Oct 23Oct 26Oct 29Nov 1Nov 3Nov 6Nov 10Nov 18
32°FOct 27Nov 1Nov 4Nov 8Nov 11Nov 15Nov 20Nov 26Dec 3
28°FNov 6Nov 11Nov 17Nov 20Nov 25Dec 1Dec 5Dec 9Dec 24
24°F98% of yrsNov 17Nov 26Dec 3Dec 7Dec 14Dec 23Jan 1Jan 6Jan 15
20°F84% of yrsDec 4Dec 15Dec 26Jan 1Jan 5Jan 9Jan 14Jan 20Feb 1
16°F52% of yrsDec 23Jan 1Jan 5Jan 8Jan 12Jan 16Jan 21Jan 28Feb 4

Freeze probabilities 1991–2020 at Greensboro 2 WNW, AL, 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 36744 →Compare Greensboro with another place →

Weather by month in Greensboro

July is the warmest month at Greensboro 2 WNW, AL, averaging 91°F by day and 71°F at night; January is the coldest at 56°F and 35°F. A freezing night is all but certain in every month from December to February (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 79% of years and April still brings one in 19% of years.

Warmth for growing adds up to 5,754 growing degree days a year (base 50°F), more than at 59% of the 115 Alabama stations. 41% of them (2,338) have built up by the end of June, and July adds the most, 956. Precipitation totals 55.0 inches a year, most in June (5.8") and least in October (3.3"); May to September bring 39% of it.

Monthly normals 1991–2020 at Greensboro 2 WNW, AL
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan56355.0100%1680
Feb61395.596%9115
Mar68455.679%4248
Apr75524.719%<1407
May82603.90%0659
Jun88685.80%0829
Jul91714.10%0956
Aug91704.00%0945
Sep86653.80%0760
Oct77533.318%<1463
Nov66434.183%6184
Dec59395.297%10107

Monthly normals 1991–2020 at Greensboro 2 WNW, AL (280 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, Greensboro, AL, 2 miles southeast of Greensboro, has a last frost 1 day later (March 18), a first frost 1 day later (November 12).

Frost dates for 36756 (Marion) →

When it snows in Greensboro, Alabama

Measurable snow is rare here: only 1 of 19 winters from 1991 to 2020 recorded 0.1 inch or more at Greensboro, AL, 1.7 miles away, so there is no typical first-snow date to plan around.

Planting calendar for 36744

What to do and when, from the 50% frost dates for Greensboro, Alabama
WhenWhat to do
January 6 – January 20Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
January 20 – February 3Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
February 17 – March 3Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
March 17 onwardTransplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by August 19Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by October 28Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
November 11 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 36744 is 2 miles from Greensboro 2 WNW, AL, which stands at 280 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 35474 (Moundville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 36744 in zone 8b, the band where the coldest night of the year averaged 15 to 20°F (-9.4 to -6.7°C) over 1991–2020; a zone describes winter lows, not frost dates.

Frost dates across Alabama →

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 8b places in Alabama