Oklahoma frost dates

Average last spring and first fall frost dates for Oklahoma’s largest cities, with each city’s USDA hardiness zone.

Reviewed October 2026

Among Oklahoma’s 20 largest cities, the average last spring frost ranges from Mar 15 in Ardmore to Apr 11 in Bartlesville. Elevation, distance from the coast and city heat all shift the date, so use your own ZIP code below for the closest match.

City	Average last spring frost	Average first fall frost	Frost-free days	Hardiness zone	Weather station used
Oklahoma City	Apr 4	Nov 2	212	7b	Oklahoma City Will Rogers Airport, OK, 7 mi
Tulsa	Mar 31	Nov 4	218	7b	Tulsa Intl Airport, OK, 5 mi
Norman	Apr 3	Nov 3	214	7b	Norman 3Sse, OK, 7 mi
Broken Arrow	Apr 1	Nov 1	214	7b	Bixby, OK, 7 mi
Edmond	Apr 10	Oct 28	201	7b	Guthrie 5S, OK, 10 mi
Lawton	Mar 26	Nov 7	226	7b	Lawton, OK, 2 mi
Moore	Mar 31	Nov 5	219	7b	Norman 2Nw Mesonet, OK, 6 mi
Midwest City	Apr 2	Nov 5	217	7b	Spencer 2Ene Mesonet, OK, 6 mi
Enid	Apr 6	Nov 1	209	7a	Enid, OK
Stillwater	Apr 5	Oct 30	208	7a	Stillwater 2 W, OK
Owasso	Mar 31	Nov 4	218	7b	Tulsa Intl Airport, OK, 7 mi
Bartlesville	Apr 11	Oct 24	196	7a	Bartlesville 3, OK, 4 mi
Muskogee	Apr 7	Oct 30	206	7b	Muskogee, OK, 3 mi
Shawnee	Mar 30	Nov 5	220	7b	Shawnee 3Nnw Mesonet, OK
Bixby	Apr 1	Nov 1	214	7b	Bixby, OK, 3 mi
Jenks	Mar 30	Nov 4	219	7b	Tulsa R L Jones Jr Airport, OK, 3 mi
Yukon	Apr 2	Nov 4	216	7b	Oklahoma City Post Airport, OK, 7 mi
Ardmore	Mar 15	Nov 14	244	8a	Ardmore, OK, 2 mi
Ponca City	Apr 10	Oct 27	200	7a	Ponca City Muni Airport, OK, 2 mi
Mustang	Apr 4	Nov 2	212	7b	Oklahoma City Will Rogers Airport, OK, 7 mi

Frost dates are the dates after (spring) or before (fall) which the chance of a 32°F freeze is below 50%, from NOAA’s 1991–2020 U.S. Climate Normals for the weather station nearest each city’s center. Zones are from the 2023 USDA Plant Hardiness Zone Map for the ZIP codes around each city; a range means nearby ZIP codes differ. Cities are the 20 largest by Census Bureau 2024 population estimates.

An average is not a guarantee. There’s still about a 1 in 2 chance of frost after the average last spring date. Many gardeners wait an extra week or two before setting out tomatoes, peppers and basil, and keep covers handy.

Planting dates for Oklahoma City

Timed from Oklahoma City’s average last frost of Apr 4, using University of New Hampshire Extension’s planting guidance. For your exact dates, enter your ZIP code in the calendar below.

Crop	Start seeds indoors	Plant outside
Tomatoes	Feb 14 to Feb 28	Apr 11 to Apr 18
Peppers	Feb 7 to Feb 21	Apr 18
Lettuce	Jan 31 to Feb 7	Mar 7 to Mar 14
Broccoli	Jan 24 to Feb 7	Mar 7 to Mar 21
Cucumbers	Mar 14 to Mar 21	Apr 11 to Apr 18
Basil	Feb 21 to Mar 7	Apr 18

When to plant, for your garden

Your seed-starting and planting dates, timed from your last spring frost. Full calendar, 12 crops.

ZIP code

Last frost date

Enter your ZIP code to look up your average last frost date and hardiness zone, or type the date in yourself.

Frost dates: NOAA U.S. Climate Normals, 1991–2020. Hardiness zones: USDA Plant Hardiness Zone Map, 2023, ZIP code data from PRISM Group, Oregon State University, prism.oregonstate.edu, accessed Oct. 20, 2026.

More about frost dates

How to find your last frost date, and what your zone means · Full planting calendar · How to start seeds indoors

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