Frost Dates for Oklahoma City, OK 73160

Last spring frost April 2 · First fall frost November 3 · 215 frost-free days · USDA Zone 7b

Frost probability for 73160

Frost10%50%90%
Spring (last frost)April 15April 2March 19
Fall (first frost)October 18November 3November 19

Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (17.6 km away); the 50% date is the median year.

Frost dates by ZIP code in Oklahoma City, OK

ZIPLast spring frost (50%)First fall frost (50%)Zone
73160April 2November 37b
73170April 2November 37b
73120April 4October 307b
73110April 2November 27b
73159April 2November 37b
73119April 2November 37b
73112April 2November 27b
73162April 4October 307b
73132April 4October 307b
73127April 2November 37b
73107April 2November 37b
73135April 2November 37b
73130April 2November 27b
73109April 2November 37b
73115April 2November 27b
73129April 2November 37b
73139April 2November 37b
73114April 2November 27b
73142April 4October 307b
73108April 2November 37b
73118April 2November 27b
73122April 4October 307b
73106April 2November 27b
73111April 2November 27b
73116April 2November 27b
73179April 2November 37b
73165April 2November 27b
73134April 4October 307b
73128April 2November 37b
73117April 2November 27b
73149April 2November 37b
73105April 2November 27b
73150April 2November 27b
73103April 2November 27b
73173April 2November 37b
73131April 2November 27b
73102April 2November 27b
73104April 2November 27b
73145April 2November 27b
73141April 2November 27b
73169April 2November 37b
73121April 2November 27b
73151April 2November 27b

Month by month in Oklahoma City

MonthWhat to do
JanuaryPlan your garden layout and order seeds. Research varieties suited to your frost dates.
FebruaryStart peppers and eggplant indoors 8–10 weeks before your last frost (around April 2). Start tomatoes about two weeks later, 6–8 weeks before last frost.
MarchStart herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable.
AprilLast frost around April 2. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings.
MayFrost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini.
JuneSuccession plant lettuce and greens. Keep beds weeded and watered consistently.
JulyHarvest regularly to encourage production. Monitor for pests and disease.
AugustMidsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall.
SeptemberDirect sow carrots and beets for fall harvest. Start fall broccoli and kale indoors.
OctoberFirst fall frost approaching (around November 3). Transplant fall brassicas. Sow spinach, arugula, and radishes.
NovemberFirst frost around November 3. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season.
DecemberHarvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year.

What grows in a 215-day season

Frequently Asked Questions

What is the last frost date for Oklahoma City, OK (ZIP 73160)?

The median last spring frost date for Oklahoma City, OK (ZIP code 73160) is around April 2. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.

What is the first fall frost date in Oklahoma City, OK?

The median first fall frost date for Oklahoma City, OK is around November 3. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.

How long is the growing season in Oklahoma City, OK?

The frost-free growing season in Oklahoma City is about 215 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.

What USDA hardiness zone is Oklahoma City, OK?

Based on frost date patterns, Oklahoma City falls approximately in 7b. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.

When should I start tomatoes indoors in Oklahoma City, OK?

Start tomato seeds indoors 6–8 weeks before your last frost date (around April 2). For Oklahoma City, that's roughly February 6 to February 20. Transplant outdoors 1–2 weeks after your last frost.

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