When is the last frost in Oklahoma City, OK?

The average (50% probability) last spring frost in Oklahoma City is April 4, based on NOAA 1991–2020 normals. A 1-in-10 risk remains until April 20.

When is the first frost in Oklahoma City?

The average first fall frost in Oklahoma City is November 2, with a growing season of about 213 days.

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Oklahoma City, Oklahoma frost dates

Average last spring frost: April 4. Average first fall frost: November 2. That gives a growing season of about 213 days. For frost-tender plants, a safer planting date is April 20, after which a freeze happens in only 1 year in 10.

Last frost (50%)

Apr 4

1-in-10 risk after Apr 20

First frost (50%)

Nov 2

1-in-10 risk before Oct 21

Growing season

213 days

median frost-free days

Hard freeze (28°F)

Mar 21

median last 28°F in spring

Frost risk by date

Chance of frost	Spring: frost after	Fall: frost before
90%	March 16	November 17
70%	March 28	November 8
50%	April 4	November 2
30%	April 10	October 29
10%	April 20	October 21

Read the spring column like this: there is a 10% chance of a 32°F freeze after April 20. These are NOAA probabilities for the Oklahoma City Will Rogers Airport weather station (USW00013967, elevation 392 m), 1991–2020.

Oklahoma City vegetable planting calendar

Dates count from the 50% last-frost date (April 4). For tomatoes, peppers and other frost-tender crops, waiting until the 10% date (Apr 20) is the cautious choice.

Crop	Start seeds indoors	Plant out
Beans	Mar 14	Apr 11 (usually sown directly in the garden)
Broccoli	Jan 24	Mar 7
Brussels sprouts	Jan 24	Mar 7
Cabbage	Jan 17	Feb 28
Cauliflower	Feb 7	Mar 21
Sweet corn	Mar 7	Apr 4 (usually sown directly in the garden)
Cucumbers	Mar 21	Apr 11
Kale	Jan 17	Feb 28
Leeks	Dec 20	Feb 28
Lettuce	Feb 14	Mar 21
Melons	Mar 28	Apr 18
Onions	Dec 13	Feb 21 (from seed; sets and transplants go out at the same time)
Peas	Feb 7	Mar 7 (usually sown directly in the garden)
Peppers	Feb 21	Apr 18
Squash	Mar 28	Apr 18
Tomatoes	Feb 7	Apr 4

Offsets from Oregon State University Extension's seed-starting table. "Plant out" means transplant, or sow directly for crops usually grown from seed.

Fall frost and season extension

The first fall freeze usually arrives around November 2. There's a 1-in-10 chance it comes before October 21. Harvest tender crops such as basil, tomatoes, peppers and squash before then, or cover them on cold nights. Cool-season crops like kale, cabbage and Brussels sprouts handle light frost, and often taste sweeter after it. A hard freeze (28°F) typically comes around November 11.

Nearby cities

City	Last frost (50%)	First frost (50%)	Distance
Tulsa, OK	Mar 31	Nov 4	~179 km
Wichita, KS	Apr 11	Oct 29	~252 km
Dallas, TX	Mar 8	Nov 24	~281 km
Amarillo, TX	Apr 13	Oct 27	~372 km
Lubbock, TX	Apr 4	Nov 2	~427 km
Springfield, MO	Apr 9	Oct 27	~432 km

More: all Oklahoma frost dates