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USDA Hardiness Zone 7b

Frost Dates for 73096 — Weatherford, Oklahoma

NOAA 1991–2020 normals from Weatherford, OK (1,618 ft), under a mile southeast.

Updated

In Weatherford, the last spring frost (32°F) is around April 3 in half of years and has passed by April 21 in nine years out of ten. The first fall frost comes around November 3, as early as October 20 one year in ten, leaving a typical freeze-free season of 214 days (NOAA, Weatherford, OK).

Last spring frost
April 3

50% probability

First fall frost
November 3

50% probability

Growing season
214 days

freeze-free, 50%

Hardiness zone
7b

5 to 10°F (-15.0 to -12.2°C) coldest night

First snow
December 15

median, 1991–2020

Last snow
February 8

median, 1991–2020

Winters with snow
87%

26 of 30 observed

Snow per year
5.7"

NOAA normal

Frost risk by date in Weatherford

Half of springs at Weatherford, OK see their last 32°F night by April 3; only one in ten is past it by March 16, and one in ten still has one after April 21. Planting tender crops after April 10 leaves a 30% risk of a frost on them, after April 16 20%, and after April 21 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 60% of the 114 Oklahoma stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 3 in half of years, as early as October 20 one year in ten, and holds off past November 18 one year in ten. A hard freeze of 28°F follows 8 days later, around November 11; in spring the one-in-ten date for 28°F is April 7, 14 days before the 32°F one. The freeze-free season lasts 214 days in a typical year, longer than at 61% of the 114 Oklahoma stations; it reaches 236 days one year in ten and falls short of 190 one year in ten. On average 85 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 12 days longer, to about April 15, and return around October 24. Severe cold of 16°F or below comes in 99% of winters, usually between December 15 and February 12.

Spring: the chance of another night this cold after the date
Low90%80%70%60%50%40%30%20%10%
36°FMar 31Apr 3Apr 7Apr 11Apr 15Apr 19Apr 22Apr 26May 1
32°FMar 16Mar 23Mar 28Apr 1Apr 3Apr 6Apr 10Apr 16Apr 21
28°FMar 2Mar 7Mar 11Mar 15Mar 21Mar 25Mar 30Apr 2Apr 7
24°FFeb 20Feb 26Mar 1Mar 4Mar 7Mar 11Mar 14Mar 21Mar 30
20°FJan 31Feb 11Feb 18Feb 22Feb 26Mar 1Mar 4Mar 9Mar 14
16°F99% of yrsJan 15Jan 25Jan 31Feb 6Feb 12Feb 18Feb 23Mar 1Mar 5
Fall: the chance the first night this cold has come by the date
Low10%20%30%40%50%60%70%80%90%
36°FOct 13Oct 17Oct 20Oct 22Oct 24Oct 27Oct 30Nov 2Nov 6
32°FOct 20Oct 24Oct 28Nov 1Nov 3Nov 6Nov 9Nov 12Nov 18
28°FOct 26Nov 1Nov 5Nov 8Nov 11Nov 14Nov 18Nov 22Nov 28
24°FNov 2Nov 8Nov 13Nov 18Nov 22Nov 26Nov 30Dec 4Dec 9
20°FNov 12Nov 18Nov 24Nov 29Dec 3Dec 6Dec 11Dec 16Dec 23
16°F99% of yrsNov 24Dec 1Dec 5Dec 11Dec 15Dec 20Dec 27Jan 3Jan 13

Freeze probabilities 1991–2020 at Weatherford, OK, 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 73096 →Compare Weatherford with another place →

Weather by month in Weatherford

July is the warmest month at Weatherford, OK, averaging 94°F by day and 71°F at night; January is the coldest at 49°F and 26°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 60% of years.

Warmth for growing adds up to 5,020 growing degree days a year (base 50°F), fewer than at 69% of the 114 Oklahoma stations. 38% of them (1,888) have built up by the end of June, and July adds the most, 1,006. Precipitation totals 30.3 inches a year, most in May (4.5") and least in January (1.1"); May to September bring 56% of it.

Monthly normals 1991–2020 at Weatherford, OK
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan49261.1100%2511
Feb54301.2100%1834
Mar63392.397%9138
Apr71472.860%2301
May80574.52%0576
Jun89664.00%0828
Jul94712.40%01006
Aug93693.80%0948
Sep85622.40%0698
Oct74493.140%1363
Nov61371.399%9103
Dec50281.4100%2214

Monthly normals 1991–2020 at Weatherford, OK (1,618 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, Hinton 7W Mesonet, OK, 13 miles east of Weatherford, has a last frost 2 days later (April 5), a first frost 2 days earlier (November 1), a season 6 days shorter.

Frost dates for 73047 (Hinton) →

When it snows in Weatherford, Oklahoma

The first measurable snow (0.1 inch or more) in Weatherford usually arrives around December 15, and the last of the season around February 8. Those are the middle dates across the winters of 1991–2020 at Weatherford, OK, 0.9 miles away: half of years saw snow earlier, half later. Snow fell in 87% of those winters. The last 32°F night of spring typically comes 54 days after the last snow.

Planting calendar for 73096

What to do and when, from the 50% frost dates for Weatherford, Oklahoma
WhenWhat to do
January 23 – February 6Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
February 6 – February 20Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
March 6 – March 20Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
April 3 onwardTransplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by August 11Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by October 20Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
November 3 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 73096 is under a mile from Weatherford, OK, which stands at 1,618 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 73096 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020; a zone describes winter lows, not frost dates.

Frost dates across Oklahoma →

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 7b places in Oklahoma