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USDA Hardiness Zone 8a

Frost Dates for 79512 — Colorado City, Texas

NOAA 1991–2020 normals from Colorado City, TX (2,110 ft), 5 miles northeast.

Updated

In Colorado City, the last spring frost (32°F) is around April 4 in half of years and has passed by April 22 in nine years out of ten. The first fall frost comes around November 5, as early as October 22 one year in ten, leaving a typical freeze-free season of 216 days (NOAA, Colorado City, TX).

Last spring frost
April 4

50% probability

First fall frost
November 5

50% probability

Growing season
216 days

freeze-free, 50%

Hardiness zone
8a

10 to 15°F (-12.2 to -9.4°C) coldest night

First snow
Rare

median, 1991–2020

Last snow
Rare

median, 1991–2020

Winters with snow
27%

4 of 15 observed

Snow per year
1.6"

NOAA normal

Frost risk by date in Colorado City

Half of springs at Colorado City, TX see their last 32°F night by April 4; only one in ten is past it by March 13, and one in ten still has one after April 22. Planting tender crops after April 12 leaves a 30% risk of a frost on them, after April 17 20%, and after April 22 10%. The 18 days between the even-odds date and the one-in-ten date is narrower than at 75% of the 339 Texas stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 5 in half of years, as early as October 22 one year in ten, and holds off past November 19 one year in ten. A hard freeze of 28°F follows 9 days later, around November 14; in spring the one-in-ten date for 28°F is April 11, 11 days before the 32°F one. The freeze-free season lasts 216 days in a typical year, shorter than at 88% of the 339 Texas stations; it reaches 240 days one year in ten and falls short of 193 one year in ten. On average 76 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 10 days longer, to about April 14, and return around October 28. Severe cold of 16°F or below comes in 94% of winters, usually between December 20 and February 7.

Spring: the chance of another night this cold after the date
Low90%80%70%60%50%40%30%20%10%
36°FMar 26Apr 3Apr 8Apr 11Apr 14Apr 18Apr 20Apr 24Apr 29
32°FMar 13Mar 20Mar 26Mar 31Apr 4Apr 7Apr 12Apr 17Apr 22
28°FMar 2Mar 7Mar 11Mar 14Mar 18Mar 25Mar 31Apr 4Apr 11
24°FFeb 15Feb 22Feb 27Mar 2Mar 5Mar 9Mar 12Mar 16Mar 27
20°FJan 28Feb 6Feb 13Feb 18Feb 23Feb 26Mar 1Mar 5Mar 11
16°F94% of yrsDec 31Jan 14Jan 25Feb 1Feb 7Feb 12Feb 17Feb 23Mar 2
Fall: the chance the first night this cold has come by the date
Low10%20%30%40%50%60%70%80%90%
36°FOct 14Oct 19Oct 22Oct 25Oct 28Oct 31Nov 2Nov 5Nov 9
32°FOct 22Oct 27Oct 31Nov 3Nov 5Nov 8Nov 10Nov 13Nov 19
28°FOct 31Nov 4Nov 8Nov 11Nov 14Nov 17Nov 20Nov 26Dec 1
24°FNov 8Nov 13Nov 17Nov 21Nov 24Nov 28Dec 1Dec 4Dec 9
20°FNov 18Nov 23Nov 27Dec 1Dec 4Dec 8Dec 11Dec 16Dec 24
16°F94% of yrsNov 27Dec 3Dec 9Dec 14Dec 20Dec 25Jan 1Jan 6Jan 22

Freeze probabilities 1991–2020 at Colorado City, 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 79512 →Compare Colorado City with another place →

Weather by month in Colorado City

July is the warmest month at Colorado City, TX, averaging 97°F by day and 71°F at night; January is the coldest at 58°F and 28°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 59% of years.

Warmth for growing adds up to 5,784 growing degree days a year (base 50°F), fewer than at 82% of the 351 Texas stations. 41% of them (2,347) have built up by the end of June, and July adds the most, 1,044. Precipitation totals 22.1 inches a year, most in June (3.1") and least in January (0.9"); May to September bring 55% of it.

Monthly normals 1991–2020 at Colorado City, TX
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan58280.9100%2226
Feb62311.3100%1565
Mar70401.798%7222
Apr81471.559%1416
May87592.21%0721
Jun93673.10%0898
Jul97712.00%01044
Aug96693.00%0995
Sep88621.90%0747
Oct79502.331%1463
Nov67381.297%10151
Dec59291.0100%2137

Monthly normals 1991–2020 at Colorado City, TX (2,110 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, Snyder, TX, 24 miles north of Colorado City and 209 feet higher, has a last frost 8 days earlier (March 27), a first frost 5 days later (November 10), a season 11 days longer.

Frost dates for 79549 (Snyder) →

When it snows in Colorado City, Texas

Measurable snow is rare here: only 4 of 15 winters from 1991 to 2020 recorded 0.1 inch or more at Colorado City, TX, 4.9 miles away, so there is no typical first-snow date to plan around.

Planting calendar for 79512

What to do and when, from the 50% frost dates for Colorado City, Texas
WhenWhat to do
January 24 – February 7Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
February 7 – February 21Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
March 7 – March 21Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
April 4 onwardTransplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by August 13Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by October 22Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
November 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 79512 is 5 miles from Colorado City, TX, which stands at 2,110 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 79512 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°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.

Other zone 8a places in Texas