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USDA Hardiness Zone 9a

Frost Dates for 75939 — Corrigan, Texas

NOAA 1991–2020 normals from Lufkin Angelina Co Airport, TX (288 ft), 17 miles north.

Updated

In Corrigan, the last spring frost (32°F) is around March 11 in half of years and has passed by April 4 in nine years out of ten. The first fall frost comes around November 15, as early as October 30 one year in ten, leaving a typical freeze-free season of 247 days (NOAA, Lufkin Angelina Co Airport, TX).

Last spring frost
March 11

50% probability

First fall frost
November 15

50% probability

Growing season
247 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
6%

1 of 18 observed

Snow per year
0.1"

NOAA normal

Frost risk by date in Corrigan

Half of springs at Lufkin Angelina Co Airport, TX see their last 32°F night by March 11; only one in ten is past it by February 17, and one in ten still has one after April 4. Planting tender crops after March 22 leaves a 30% risk of a frost on them, after March 28 20%, and after April 4 10%. The 24 days between the even-odds date and the one-in-ten date is wider than at 76% of the 339 Texas 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 November 15 in half of years, as early as October 30 one year in ten, and holds off past December 4 one year in ten. A hard freeze of 28°F follows 13 days later, around November 28; in spring the one-in-ten date for 28°F is March 17, 18 days before the 32°F one. The freeze-free season lasts 247 days in a typical year, shorter than at 51% of the 339 Texas stations; it reaches 276 days one year in ten and falls short of 219 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 17 days longer, to about March 28, and return around November 4. Nights of 24°F, cold enough to damage hardier plants, come in 93% of winters and 16°F in 20%.

Spring: the chance of another night this cold after the date
Low90%80%70%60%50%40%30%20%10%
36°FMar 4Mar 12Mar 18Mar 23Mar 28Apr 2Apr 5Apr 9Apr 16
32°FFeb 17Feb 26Mar 2Mar 6Mar 11Mar 16Mar 22Mar 28Apr 4
28°FJan 27Feb 3Feb 11Feb 19Feb 25Mar 1Mar 5Mar 10Mar 17
24°F93% of yrsDec 31Jan 14Jan 22Jan 29Feb 2Feb 9Feb 18Feb 27Mar 6
20°F59% of yrsDec 19Dec 31Jan 6Jan 12Jan 18Jan 26Jan 31Feb 8Feb 23
16°F20% 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°FOct 22Oct 26Oct 30Nov 1Nov 4Nov 7Nov 11Nov 14Nov 20
32°FOct 30Nov 3Nov 7Nov 11Nov 15Nov 19Nov 23Nov 29Dec 4
28°FNov 6Nov 13Nov 19Nov 23Nov 28Dec 2Dec 7Dec 15Dec 27
24°F93% of yrsNov 22Nov 29Dec 4Dec 10Dec 21Dec 28Jan 3Jan 9Jan 21
20°F59% of yrsDec 4Dec 14Dec 25Dec 31Jan 3Jan 6Jan 11Jan 20Feb 4
16°F20% of yrstoo rare for a date

Freeze probabilities 1991–2020 at Lufkin Angelina Co Airport, TX, 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 75939 →Compare Corrigan with another place →

Weather by month in Corrigan

July is the warmest month at Lufkin Angelina Co Airport, TX, averaging 93°F by day and 72°F at night; January is the coldest at 60°F and 38°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 68% of years and April still brings one in 15% of years.

Warmth for growing adds up to 6,418 growing degree days a year (base 50°F), more than at 51% of the 351 Texas stations. 42% of them (2,673) have built up by the end of June, and July adds the most, 1,007. Precipitation totals 50.2 inches a year, most in January (4.7") and least in July (3.3"); May to September bring 39% of it.

Monthly normals 1991–2020 at Lufkin Angelina Co Airport, TX
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan60384.799%1099
Feb64423.992%5149
Mar71484.268%2312
Apr78543.715%<1482
May85634.60%0736
Jun90694.20%0895
Jul93723.30%01007
Aug94713.80%01004
Sep89663.90%0819
Oct80554.712%<1542
Nov69454.579%3249
Dec61394.799%8123

Monthly normals 1991–2020 at Lufkin Angelina Co Airport, TX (288 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, Livingston 2 NNE, TX, 19 miles southwest of Corrigan, has a last frost 10 days earlier (March 1), a first frost 9 days later (November 24), a season 22 days longer.

Frost dates for 77351 (Livingston) →

When it snows in Corrigan, Texas

Measurable snow is rare here: only 1 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Corrigan 1 ENE, TX, 1 miles away, so there is no typical first-snow date to plan around.

Planting calendar for 75939

What to do and when, from the 50% frost dates for Corrigan, Texas
WhenWhat to do
December 31 – January 14Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
January 14 – January 28Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
February 11 – February 25Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
March 11 onwardTransplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by August 23Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by November 1Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
November 15 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 75939 is 17 miles from Lufkin Angelina Co Airport, TX, which stands at 288 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 75904 (Lufkin). The 2023 USDA Plant Hardiness Zone Map lists ZIP 75939 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 Texas →

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 Texas