What Hardiness Zone Is Oklahoma?

USDA 2023 Plant Hardiness Zone Map · 761 ZIP codes · Data updated 2026-10-28

Quick answer

Oklahoma spans USDA hardiness zones 6b–8a on the 2023 Plant Hardiness Zone Map. The most common zone is 7b, covering 60% of Oklahoma's ZIP codes, followed by zone 7a (24%). Zone 7b means the coldest night of an average winter reaches 5°F to 10°F (−15°C to −12°C). Enter your ZIP code for your exact zone.

Oklahoma hardiness zones by share of ZIP codes

Zone 6b2% · 15 ZIPs

Zone 7a24% · 180 ZIPs

Zone 7b60% · 460 ZIPs

Zone 8a14% · 106 ZIPs

What the zones mean for Oklahoma gardeners

Coldest and warmest towns: among towns with NOAA weather stations, Boise City 2 E (4,133 ft) is in zone 6b, while Idabel (365 ft) is in zone 8a. That is a difference of about 15°F in the coldest night of a typical winter.
Same zone, different frost dates: within zone 7b, the median last spring frost ranges from March 23 at Mc Curtain 1 SE to April 14 at Watonga, 22 days apart. Your zone tells you which perennials survive winter; your frost dates tell you when to plant.

Typical frost dates in each Oklahoma zone

Medians across NOAA weather stations in each zone. Colder zones usually have later spring frosts, but local terrain can shift the dates by weeks.

Zone	Last spring frost	First fall frost	Stations
6b	April 18	October 24	4
7a	April 10	October 29	50
7b	April 4	November 2	79
8a	March 28	November 6	27

Hardiness zones for Oklahoma cities

Zones at the National Weather Service stations, mostly city airports, with their median frost dates.


Altus AFB	8a	10°F to 15°F	1,267	Mar 26	Nov 10
Bartlesville F P Field	7a	0°F to 5°F	715	Apr 12	Oct 21
Clinton Sherman Airport	7b	5°F to 10°F	1,922	Apr 5	Nov 4
Gage Airport	7a	0°F to 5°F	2,191	Apr 17	Oct 20
Guthrie Municipal Airport	7b	5°F to 10°F	1,068	Apr 3	Nov 1
Guymon Municipal Airport	6b	−5°F to 0°F	3,123	Apr 18	Oct 23
Lawton Municipal Airport	7b	5°F to 10°F	1,069	Apr 1	Nov 5
McAlester Regional Airport	7b	5°F to 10°F	770	Mar 31	Nov 3
Muskogee Davis Field	7b	5°F to 10°F	610	Apr 2	Nov 2
Oklahoma City Post Airport	7b	5°F to 10°F	1,297	Apr 2	Nov 4
Oklahoma City Will Rogers Airport	7b	5°F to 10°F	1,285	Apr 4	Nov 2
Ponca City Municipal Airport	7a	0°F to 5°F	1,000	Apr 10	Oct 27
Stillwater 2 W	7a	0°F to 5°F	890	Apr 5	Oct 30
Stillwater Regional Airport	7a	0°F to 5°F	984	Apr 3	Oct 31
Tulsa Intl Airport	7b	5°F to 10°F	650	Mar 31	Nov 4
Tulsa R L Jones Jr Airport	7b	5°F to 10°F	638	Mar 30	Nov 4

Hardiness zones for 160 towns in Oklahoma

Each NOAA weather station is shown with the USDA zone of the nearest ZIP code (within 8 miles). Coldest night is the zone's range for the average annual extreme minimum temperature. Click a column to sort.

Filter by town


Acme Mesonet	7b	5°F to 10°F	1,302	Apr 4	Oct 31
Ada	7b	5°F to 10°F	1,015	Apr 2	Nov 4
Ada 2NNE Mesonet	7b	5°F to 10°F	967	Mar 31	Nov 3
Altus 3S Mesonet	7b	5°F to 10°F	1,364	Apr 3	Nov 4
Altus AFB	8a	10°F to 15°F	1,267	Mar 26	Nov 10
Altus Dam	7b	5°F to 10°F	1,525	Apr 2	Nov 3
Altus Irig Rsch Station	7b	5°F to 10°F	1,380	Apr 5	Nov 2
Alva 1W	7a	0°F to 5°F	1,464	Apr 10	Oct 28
Alva 7SSW Mesonet	7a	0°F to 5°F	1,440	Apr 11	Oct 26
Anadarko 3 E	7b	5°F to 10°F	1,168	Apr 8	Oct 30
Antlers	8a	10°F to 15°F	470	Apr 3	Nov 1
Apache 4ENE Mesonet	7b	5°F to 10°F	1,443	Apr 3	Nov 3
Ardmore 3ENE Mesonet	8a	10°F to 15°F	872	Mar 18	Nov 10
Ardmore 7WNW Mesonet	8a	10°F to 15°F	928	Mar 21	Nov 8
Arnett 8WSW Mesonet	7a	0°F to 5°F	2,359	Apr 9	Oct 27
Atoka	7b	5°F to 10°F	565	Apr 5	Nov 1
Barnsdall	7a	0°F to 5°F	770	Mar 31	Oct 31
Bartlesville 3	7a	0°F to 5°F	715	Apr 11	Oct 24
Bartlesville F P Field	7a	0°F to 5°F	715	Apr 12	Oct 21
Battiest	7b	5°F to 10°F	822	Apr 13	Oct 27
Bessie 4WNW Mesonet	7b	5°F to 10°F	1,676	Apr 3	Nov 1
Billings	7a	0°F to 5°F	1,000	Apr 15	Oct 26
Bixby	7b	5°F to 10°F	605	Apr 1	Nov 1
Blackwell 1SSW	7a	0°F to 5°F	1,033	Apr 12	Oct 29
Blanchard 2 SSW	7b	5°F to 10°F	1,275	Apr 3	Nov 4
Boise City 2 E	6b	−5°F to 0°F	4,133	Apr 26	Oct 17
Breckinridge 3SE Mesnt	7a	0°F to 5°F	1,154	Apr 10	Oct 29
Bristow	7b	5°F to 10°F	830	Apr 9	Oct 25
Buffalo 1SW Mesonet	7a	0°F to 5°F	1,834	Apr 13	Oct 25
Burneyville 2SE Mesont	8a	10°F to 15°F	748	Mar 31	Nov 4
Byars 3ESE Mesonet	7b	5°F to 10°F	1,131	Mar 25	Nov 8
Carnegie 5 NE	7b	5°F to 10°F	1,481	Apr 6	Oct 31
Centrahoma 1E Mesonet	7b	5°F to 10°F	682	Mar 31	Nov 1
Centrahoma 2 ESE	7b	5°F to 10°F	710	Mar 31	Nov 4
Chandler	7b	5°F to 10°F	958	Apr 7	Oct 30
Chandler 5SE Mesonet	7b	5°F to 10°F	954	Apr 2	Nov 2
Chattanooga	8a	10°F to 15°F	1,148	Apr 7	Nov 2
Cherokee 1SSW Mesonet	7a	0°F to 5°F	1,187	Apr 10	Oct 29
Cheyenne 6SW Mesonet	7a	0°F to 5°F	2,277	Apr 3	Nov 3
Chickasaw Nra	7b	5°F to 10°F	1,047	Apr 4	Oct 31
Chickasha Experiment Station	7b	5°F to 10°F	1,085	Apr 4	Nov 1
Claremore 2 ENE	7a	0°F to 5°F	588	Apr 7	Oct 30
Clinton	7b	5°F to 10°F	1,570	Apr 13	Oct 28
Clinton Sherman Airport	7b	5°F to 10°F	1,922	Apr 5	Nov 4
Coleman 4W	8a	10°F to 15°F	747	Mar 31	Nov 5
Coyle 7N Mesonet	7b	5°F to 10°F	1,072	Apr 3	Nov 1
Cushing	7b	5°F to 10°F	950	Apr 1	Nov 5
Duncan	8a	10°F to 15°F	1,125	Mar 25	Nov 7
Durant	8a	10°F to 15°F	600	Mar 31	Nov 5
Durant 6SSE Mesonet	8a	10°F to 15°F	646	Mar 19	Nov 12
El Reno 1 N	7b	5°F to 10°F	1,325	Apr 6	Oct 31
El Reno 5 WNW Mesonet	7b	5°F to 10°F	1,374	Apr 12	Oct 27
Elk City 4 W	7b	5°F to 10°F	2,120	Apr 5	Nov 2
Enid	7a	0°F to 5°F	1,245	Apr 6	Nov 1
Erick	7a	0°F to 5°F	2,060	Apr 11	Oct 26
Fairview 1W Mesonet	7a	0°F to 5°F	1,328	Apr 5	Nov 1
Fittstown 6SW Mesonet	7b	5°F to 10°F	1,148	Mar 29	Nov 6
Fort Cobb 4NNW Mesonet	7b	5°F to 10°F	1,384	Apr 5	Nov 3
Fort Supply 3SE	7a	0°F to 5°F	2,030	Apr 21	Oct 19
Freedom	7a	0°F to 5°F	1,515	Apr 19	Oct 17
Gage Airport	7a	0°F to 5°F	2,191	Apr 17	Oct 20
Gate	7a	0°F to 5°F	2,250	Apr 13	Oct 28
Geary	7b	5°F to 10°F	1,571	Apr 6	Nov 5
Grandfield 3W Mesonet	8a	10°F to 15°F	1,122	Mar 31	Nov 6
Great Salt Plains Dam	7a	0°F to 5°F	1,200	Apr 5	Nov 1
Guthrie Municipal Airport	7b	5°F to 10°F	1,068	Apr 3	Nov 1
Guymon Municipal Airport	6b	−5°F to 0°F	3,123	Apr 18	Oct 23
Hammon 3 SSW	7a	0°F to 5°F	1,820	Apr 16	Oct 23
Healdton 3 E	8a	10°F to 15°F	902	Apr 6	Nov 1
Helena 1 SSE	7a	0°F to 5°F	1,350	Apr 9	Oct 31
Hennessey 4 ESE	7a	0°F to 5°F	1,174	Apr 14	Oct 30
Hinton 7W Mesonet	7b	5°F to 10°F	1,617	Apr 5	Nov 1
Hobart 4SE Mesonet	7b	5°F to 10°F	1,568	Apr 7	Nov 4
Holdenville 3ESE Mesonet	7b	5°F to 10°F	918	Mar 29	Nov 5
Hollis 5E	7b	5°F to 10°F	1,621	Apr 10	Oct 28
Hollis 5E Mesonet	7b	5°F to 10°F	1,630	Apr 5	Oct 31
Hooker	6b	−5°F to 0°F	3,001	Apr 16	Oct 25
Hugo	8a	10°F to 15°F	520	Mar 15	Nov 15
Idabel	8a	10°F to 15°F	365	Mar 31	Nov 3
Jefferson 3SE	7a	0°F to 5°F	1,043	Apr 18	Oct 20
Kansas 2 NE	7a	0°F to 5°F	1,190	Mar 31	Nov 2
Kingfisher 1W Mesonet	7b	5°F to 10°F	1,059	Apr 9	Nov 1
Lahoma 1WSW Mesonet	7a	0°F to 5°F	1,299	Apr 10	Oct 31
Lane 1WNW Mesonet	8a	10°F to 15°F	593	Mar 29	Nov 4
Lawton	7b	5°F to 10°F	1,150	Mar 26	Nov 7
Lawton Municipal Airport	7b	5°F to 10°F	1,069	Apr 1	Nov 5
Lindsay 2 W	7b	5°F to 10°F	980	Apr 13	Oct 27
Madill	8a	10°F to 15°F	770	Mar 27	Nov 8
Madill 11WSW Mesonet	8a	10°F to 15°F	761	Mar 24	Nov 6
Mangum	7b	5°F to 10°F	1,595	Apr 8	Nov 2
Mangum 5SE Mesonet	7b	5°F to 10°F	1,509	Apr 10	Oct 29
Mannford 6 NW	7a	0°F to 5°F	830	Apr 6	Oct 29
Marietta 5SW	8a	10°F to 15°F	802	Apr 6	Nov 2
Marshall 3SSE Mesonet	7a	0°F to 5°F	1,020	Apr 11	Oct 31
Mc Curtain 1 SE	7b	5°F to 10°F	655	Mar 23	Nov 5
McAlester Regional Airport	7b	5°F to 10°F	770	Mar 31	Nov 3
Medford 1SW Mesonet	7a	0°F to 5°F	1,089	Apr 10	Oct 28
Medicine Park 3W Mesonet	8a	10°F to 15°F	1,597	Mar 21	Nov 12
Meeker 5 W	7b	5°F to 10°F	925	Apr 4	Oct 30
Miami	7a	0°F to 5°F	805	Apr 6	Oct 27
Minco 2SSW Mesonet	7b	5°F to 10°F	1,410	Apr 3	Nov 5
Muskogee	7b	5°F to 10°F	518	Apr 7	Oct 30
Muskogee Davis Field	7b	5°F to 10°F	610	Apr 2	Nov 2
Mutual	7a	0°F to 5°F	1,890	Apr 19	Oct 26
Newkirk 5NE	7a	0°F to 5°F	1,142	Apr 16	Oct 26
Newkirk 8E Mesonet	7a	0°F to 5°F	1,200	Apr 6	Oct 30
Norman 2NW Mesonet	7b	5°F to 10°F	1,181	Mar 31	Nov 5
Norman 3SSE	7b	5°F to 10°F	1,128	Apr 3	Nov 3
Nowata	7a	0°F to 5°F	710	Apr 4	Nov 1
Okeene	7a	0°F to 5°F	1,215	Apr 7	Nov 2
Okemah	7b	5°F to 10°F	935	Mar 24	Nov 9
Oklahoma City Post Airport	7b	5°F to 10°F	1,297	Apr 2	Nov 4
Oklahoma City Will Rogers Airport	7b	5°F to 10°F	1,285	Apr 4	Nov 2
Okmulgee Wtr Wks	7b	5°F to 10°F	647	Apr 8	Oct 28
Orlando 5E Mesonet	7a	0°F to 5°F	961	Apr 10	Oct 25
Pauls Valley 1SSW Mesonet	7b	5°F to 10°F	954	Mar 28	Nov 7
Pauls Valley 4 WSW	7b	5°F to 10°F	940	Apr 5	Nov 1
Perkins 2NNW Mesonet	7b	5°F to 10°F	958	Apr 4	Nov 2
Perry	7a	0°F to 5°F	1,025	Apr 4	Nov 1
Ponca City Municipal Airport	7a	0°F to 5°F	1,000	Apr 10	Oct 27
Pryor	7a	0°F to 5°F	625	Apr 5	Oct 30
Purcell 2 SW	7b	5°F to 10°F	1,120	Apr 4	Nov 2
Putnam 3N Mesonet	7a	0°F to 5°F	1,932	Apr 8	Nov 1
Ralston	7a	0°F to 5°F	825	Apr 11	Oct 24
Red Rock 7SSE Mesonet	7a	0°F to 5°F	961	Apr 8	Oct 28
Ringling 1N Mesonet	8a	10°F to 15°F	928	Mar 23	Nov 7
Sallisaw 2 NW	7b	5°F to 10°F	660	Mar 30	Nov 7
Seminole	7b	5°F to 10°F	924	Apr 5	Nov 1
Seminole 4SSW Mesonet	7b	5°F to 10°F	958	Apr 1	Nov 1
Shawnee 3NNW Mesonet	7b	5°F to 10°F	1,076	Mar 30	Nov 5
Smithville	7b	5°F to 10°F	822	Apr 9	Oct 29
Spavinaw	7a	0°F to 5°F	685	Apr 7	Nov 2
Spencer 2ENE Mesonet	7b	5°F to 10°F	1,223	Apr 2	Nov 5
Stillwater 2 W	7a	0°F to 5°F	890	Apr 5	Oct 30
Stillwater Regional Airport	7a	0°F to 5°F	984	Apr 3	Oct 31
Stilwell 5 NNW	7b	5°F to 10°F	1,000	Mar 31	Nov 4
Tahlequah	7b	5°F to 10°F	850	Apr 4	Oct 31
Taloga	7a	0°F to 5°F	1,715	Apr 18	Oct 21
Tipton 4S Mesonet	7b	5°F to 10°F	1,269	Apr 3	Nov 6
Tishomingo 6N Mesonet	8a	10°F to 15°F	879	Mar 29	Nov 5
Tulsa Intl Airport	7b	5°F to 10°F	650	Mar 31	Nov 4
Tulsa R L Jones Jr Airport	7b	5°F to 10°F	638	Mar 30	Nov 4
Turpin 4 SSE	6b	−5°F to 0°F	2,705	Apr 17	Oct 25
Tuskahoma	7b	5°F to 10°F	600	Apr 11	Oct 27
Upper Spavinaw Port	7a	0°F to 5°F	795	Apr 16	Oct 20
Velma 7NW Mesonet	8a	10°F to 15°F	1,118	Mar 28	Nov 7
Wagoner	7b	5°F to 10°F	590	Mar 29	Nov 5
Walters	8a	10°F to 15°F	1,005	Apr 1	Nov 5
Walters 4NW Mesonet	8a	10°F to 15°F	1,063	Mar 26	Nov 6
Watonga	7b	5°F to 10°F	1,530	Apr 14	Oct 27
Watonga 7W Mesonet	7b	5°F to 10°F	1,696	Apr 6	Nov 3
Waurika	8a	10°F to 15°F	912	Mar 24	Nov 8
Waurika 1ENE Mesonet	8a	10°F to 15°F	928	Mar 29	Nov 5
Waynoka	7a	0°F to 5°F	1,508	Apr 12	Oct 24
Weatherford	7b	5°F to 10°F	1,618	Apr 3	Nov 3
Webbers Falls 5 WSW	7b	5°F to 10°F	550	Apr 6	Oct 30
Wichita Mountain Wr	8a	10°F to 15°F	1,665	Mar 28	Nov 6
Wilburton 9 ENE	7b	5°F to 10°F	635	Apr 2	Nov 5
Wister 3S	7b	5°F to 10°F	525	Apr 6	Nov 2
Woodward 2WSW Mesonet	7a	0°F to 5°F	2,050	Apr 5	Oct 30

Frequently asked questions

What hardiness zone is Oklahoma?

Oklahoma is in USDA hardiness zones 6b–8a on the 2023 USDA Plant Hardiness Zone Map. Zone 7b is the most common, covering 60% of Oklahoma's ZIP codes, and zone 7a covers 24%. Enter your ZIP code for your exact zone.

What does zone 7b mean?

Zone 7b means the average annual extreme minimum temperature, the coldest night of a typical winter, is 5°F to 10°F (−15°C to −12°C). Perennials, shrubs and trees rated for zone 7b or colder should survive winter there.

What is the coldest hardiness zone in Oklahoma?

Zone 6b is the coldest zone mapped in Oklahoma, found around Boise City 2 E, and zone 8a is the warmest, found around Idabel.

Did Oklahoma's hardiness zones change in 2023?

The USDA released a new Plant Hardiness Zone Map in November 2023, based on 1991–2020 temperatures instead of 1976–2005. About half of the United States shifted half a zone warmer. Check your ZIP code here, because plant tags and older books may still list your 2012 zone.

When should I plant in zone 7b?

Hardiness zones don't set planting dates; frost dates do. Inside zone 7b in Oklahoma, the median last spring frost varies from March 23 to April 14. Look up your local frost dates and plant tender crops such as tomatoes after the 10%-risk last-frost date.

Zone and frost dates: use both

Your hardiness zone answers one question: will this plant survive the winter here? Choose perennials, shrubs, trees and bulbs rated for your zone or a colder one. For vegetables and annuals, what matters is the length of the frost-free season. See Oklahoma frost dates by town, or get a planting calendar for your ZIP code with start-indoors, transplant and sowing dates for 30 crops.

Sources and method

Zones are from the USDA 2023 Plant Hardiness Zone Map ZIP-code files published by the PRISM Climate Group, Oregon State University, based on 1991–2020 minimum temperatures. ZIP codes are assigned to states by USPS prefix. Town zones use the ZIP code nearest each NOAA 1991–2020 Climate Normals station. This is an independent tool, not an official USDA site. Full methodology.