USDA Hardiness Zone 7b

Frost Dates for 73005 — Anadarko, Oklahoma

NOAA 1991–2020 normals from Anadarko 3 E, OK (1,168 ft), 2 miles east.

Updated October 28, 2026

In Anadarko, the last spring frost (32°F) is around April 8 in half of years and has passed by April 25 in nine years out of ten. The first fall frost comes around October 30, as early as October 15 one year in ten, leaving a typical freeze-free season of 202 days (NOAA, Anadarko 3 E, OK).

Last spring frost: April 8
First fall frost: October 30
Growing season: 202 days
Hardiness zone: 7b

First snow: December 22
Last snow: January 12
Winters with snow: 52%
Snow per year: 2.3"

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Frost risk by date in Anadarko

Half of springs at Anadarko 3 E, OK see their last 32°F night by April 8; only one in ten is past it by March 24, and one in ten still has one after April 25. Planting tender crops after April 16 leaves a 30% risk of a frost on them, after April 20 20%, and after April 25 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 41% of the 114 Oklahoma stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 30 in half of years, as early as October 15 one year in ten, and holds off past November 12 one year in ten. A hard freeze of 28°F follows 8 days later, around November 7; in spring the one-in-ten date for 28°F is April 15, 10 days before the 32°F one. The freeze-free season lasts 202 days in a typical year, shorter than at 82% of the 114 Oklahoma stations; it reaches 223 days one year in ten and falls short of 181 one year in ten. On average 96 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 11 days longer, to about April 19, and return around October 21. Severe cold of 16°F or below comes every winter, usually between December 9 and February 19.

Spring: the chance of another night this cold after the date
Low	90%	80%	70%	60%	50%	40%	30%	20%	10%
36°F	Apr 4	Apr 9	Apr 14	Apr 16	Apr 19	Apr 22	Apr 25	Apr 28	May 2
32°F	Mar 24	Mar 30	Apr 2	Apr 5	Apr 8	Apr 13	Apr 16	Apr 20	Apr 25
28°F	Mar 8	Mar 15	Mar 20	Mar 25	Mar 30	Apr 1	Apr 5	Apr 8	Apr 15
24°F	Feb 25	Mar 3	Mar 7	Mar 11	Mar 15	Mar 20	Mar 25	Mar 31	Apr 4
20°F	Feb 9	Feb 19	Feb 24	Feb 28	Mar 3	Mar 7	Mar 11	Mar 15	Mar 23
16°F	Jan 20	Jan 30	Feb 6	Feb 12	Feb 19	Feb 24	Mar 1	Mar 5	Mar 12

Fall: the chance the first night this cold has come by the date
Low	10%	20%	30%	40%	50%	60%	70%	80%	90%
36°F	Oct 7	Oct 13	Oct 16	Oct 19	Oct 21	Oct 24	Oct 26	Oct 30	Nov 2
32°F	Oct 15	Oct 21	Oct 24	Oct 27	Oct 30	Nov 1	Nov 4	Nov 7	Nov 12
28°F	Oct 23	Oct 29	Nov 1	Nov 4	Nov 7	Nov 10	Nov 13	Nov 18	Nov 24
24°F	Oct 30	Nov 4	Nov 8	Nov 12	Nov 15	Nov 19	Nov 23	Nov 29	Dec 4
20°F	Nov 6	Nov 13	Nov 17	Nov 22	Nov 26	Dec 1	Dec 4	Dec 10	Dec 18
16°F	Nov 17	Nov 24	Nov 30	Dec 4	Dec 9	Dec 14	Dec 20	Dec 28	Jan 7

Freeze probabilities 1991–2020 at Anadarko 3 E, 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 73005 →Compare Anadarko with another place →

Frost risk through the year in Anadarko

Frost curve for Anadarko, Oklahoma (Anadarko 3 E, OK, NOAA 1991–2020): the chance of another 32°F night falls from 90% on March 24 to 50% on April 8 and 10% on April 25; the chance that the first fall one has come rises from 10% on October 15 to 50% on October 30 and 90% on November 12. — In Anadarko, the spring curve drops under 10% on April 25 and the fall curve passes 10% on October 15, 173 days later; that gap is shorter than at 78% of the 114 Oklahoma stations with frost dates. The spring risk falls from 90% to 10% over 32 days (March 24 to April 25) and the fall risk climbs from 10% to 90% over 28 days (October 15 to November 12): both ends of the season vary about as much. At Apache 4ENE Mesonet, OK, 10 miles south, the same gap runs from April 21 to October 20, 9 days longer.

Chance of a frost after each planting date in Anadarko
Planted on	Another 32°F night	28°F night
Mar 25	88%	60%
Apr 1	73%	40%
Apr 850% date	50%	20%
Apr 15	33%	under 10%
Apr 22	16%	under 10%
Apr 29	under 10%	under 10%

Weather by month in Anadarko

July is the warmest month at Anadarko 3 E, OK, averaging 93°F by day and 72°F at night; January is the coldest at 50°F and 25°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 74% of years.

Warmth for growing adds up to 5,025 growing degree days a year (base 50°F), fewer than at 67% of the 114 Oklahoma stations. 38% of them (1,889) have built up by the end of June, and July adds the most, 1,001. Precipitation totals 31.8 inches a year, most in May (4.9") and least in January (1.1"); May to September bring 54% of it.

Monthly normals 1991–2020 at Anadarko 3 E, OK
Month	High °F	Low °F	Precip. in	32°F night	Nights ≤ 32°F	GDD 50°F
Jan	50	25	1.1	100%	26	12
Feb	55	29	1.4	100%	19	35
Mar	63	37	2.2	98%	11	127
Apr	72	46	3.1	74%	3	294
May	80	58	4.9	3%	<1	585
Jun	88	68	3.7	0%	0	835
Jul	93	72	2.6	0%	0	1001
Aug	93	70	2.9	0%	0	969
Sep	85	61	3.0	0%	0	681
Oct	74	48	3.2	54%	2	360
Nov	61	37	2.0	100%	12	104
Dec	52	28	1.7	100%	23	21

Monthly normals 1991–2020 at Anadarko 3 E, OK (1,168 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, Apache 4ENE Mesonet, OK, 10 miles south of Anadarko and 275 feet higher, has a last frost 5 days earlier (April 3), a first frost 4 days later (November 3), a season 11 days longer.

Frost dates for 73538 (Elgin) →

When it snows in Anadarko, Oklahoma

The first measurable snow (0.1 inch or more) in Anadarko usually arrives around December 22, and the last of the season around January 12. Those are the middle dates across the winters of 1991–2020 at Anadarko 3 E, OK, 2.4 miles away: half of years saw snow earlier, half later. Snow fell in 52% of those winters. The last 32°F night of spring typically comes 86 days after the last snow.

Planting calendar for 73005

What to do and when, from the 50% frost dates for Anadarko, Oklahoma
When	What to do
January 28 – February 11	Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
February 11 – February 25	Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
March 11 – March 25	Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
April 8 onward	Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by August 7	Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by October 16	Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
October 30 onward	Plant 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 73005 is 2 miles from Anadarko 3 E, OK, which stands at 1,168 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 73005 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.