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USDA Hardiness Zone 9a

Frost Dates for 78132 — New Braunfels, Texas

NOAA 1991–2020 normals from New Braunfels, TX (720 ft), 6 miles south.

Updated

In New Braunfels, the last spring frost (32°F) is around March 8 in half of years and has passed by April 1 in nine years out of ten. The first fall frost comes around November 18, as early as November 2 one year in ten, leaving a typical freeze-free season of 253 days (NOAA, New Braunfels, TX).

Last spring frost
March 8

50% probability

First fall frost
November 18

50% probability

Growing season
253 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 New Braunfels

Half of springs at New Braunfels, TX see their last 32°F night by March 8; only one in ten is past it by February 17, and one in ten still has one after April 1. Planting tender crops after March 18 leaves a 30% risk of a frost on them, after March 24 20%, and after April 1 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 18 in half of years, as early as November 2 one year in ten, and holds off past December 10 one year in ten. A hard freeze of 28°F follows 14 days later, around December 2; in spring the one-in-ten date for 28°F is March 17, 15 days before the 32°F one. The freeze-free season lasts 253 days in a typical year, longer than at 56% of the 339 Texas stations; it reaches 287 days one year in ten and falls short of 223 one year in ten. On average 32 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 25, and return around November 7. Nights of 24°F, cold enough to damage hardier plants, come in 91% of winters and 16°F in 21%.

Spring: the chance of another night this cold after the date
Low90%80%70%60%50%40%30%20%10%
36°FFeb 28Mar 7Mar 14Mar 19Mar 25Mar 31Apr 3Apr 8Apr 18
32°FFeb 17Feb 23Feb 28Mar 3Mar 8Mar 13Mar 18Mar 24Apr 1
28°FJan 29Feb 7Feb 14Feb 20Feb 24Feb 28Mar 5Mar 10Mar 17
24°F91% of yrsJan 3Jan 16Jan 27Feb 1Feb 7Feb 14Feb 22Mar 1Mar 8
20°F60% of yrsDec 25Jan 2Jan 9Jan 16Jan 23Jan 31Feb 6Feb 15Mar 1
16°F21% 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 25Oct 29Nov 1Nov 4Nov 7Nov 10Nov 13Nov 18Nov 25
32°FNov 2Nov 6Nov 10Nov 14Nov 18Nov 22Nov 27Dec 1Dec 10
28°FNov 10Nov 17Nov 23Nov 29Dec 2Dec 6Dec 15Dec 28Jan 8
24°F91% of yrsNov 27Dec 3Dec 10Dec 18Dec 28Jan 1Jan 8Jan 17Feb 2
20°F60% of yrsDec 8Dec 19Dec 27Jan 1Jan 6Jan 10Jan 17Jan 28Feb 10
16°F21% of yrstoo rare for a date

Freeze probabilities 1991–2020 at New Braunfels, 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 78132 →Compare New Braunfels with another place →

Weather by month in New Braunfels

August is the warmest month at New Braunfels, TX, averaging 95°F by day and 71°F at night; January is the coldest at 62°F and 37°F. A freezing night is all but certain in every month from January to February (a 90% chance or more). From May to October the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 64% of years and April still brings one in 11% of years.

Warmth for growing adds up to 6,606 growing degree days a year (base 50°F), more than at 59% of the 351 Texas stations. 42% of them (2,747) have built up by the end of June, and August adds the most, 1,021. Precipitation totals 33.7 inches a year, most in May (3.6") and least in February (1.9"); May to September bring 48% of it.

Monthly normals 1991–2020 at New Braunfels, TX
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan62372.396%11102
Feb66401.994%6153
Mar73482.764%3336
Apr79542.511%<1499
May85643.60%0755
Jun90703.60%0903
Jul93723.00%01015
Aug95712.40%01021
Sep89663.50%0828
Oct81563.26%<1575
Nov71462.476%3280
Dec63402.688%9139

Monthly normals 1991–2020 at New Braunfels, TX (720 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, Canyon Dam, TX, 8 miles north of New Braunfels and 280 feet higher, has a last frost 7 days earlier (March 1), a first frost 13 days later (December 1), a season 23 days longer.

Frost dates for 78133 (Canyon Lake) →

When it snows in New Braunfels, Texas

Measurable snow is rare here: only 0 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at New Braunfels, TX, 6.2 miles away, so there is no typical first-snow date to plan around.

Planting calendar for 78132

What to do and when, from the 50% frost dates for New Braunfels, Texas
WhenWhat to do
December 28 – January 11Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
January 11 – January 25Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
February 8 – February 22Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
March 8 onwardTransplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by August 26Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by November 4Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
November 18 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 78132 is 6 miles from New Braunfels, TX, which stands at 720 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 78130 (New Braunfels). The 2023 USDA Plant Hardiness Zone Map lists ZIP 78132 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