When is the last frost in Broken Arrow, OK?

The average last spring frost (50% probability of 32°F) in Broken Arrow is around April 1, based on NOAA/NCEI 1991–2020 normals at the Bixby, OK station (4.1 mi away). Half of years it falls outside that date, so wait 1–2 weeks past it before setting out frost-tender plants.

When is the first fall frost in Broken Arrow?

The average first fall frost in Broken Arrow, OK is around November 1, giving roughly a 212-day frost-free growing season.

What planting zone is Broken Arrow, OK?

Broken Arrow is in USDA plant hardiness zone 7b (average annual extreme minimum temperature 5 to 10°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Broken Arrow?

In Broken Arrow, OK the warmest month is July (avg high 94°F) and the coldest is January (avg low 28.1°F). It averages about 42.1″ of precipitation a year.

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Broken Arrow, OK Planting Calendar & Frost Dates

USDA hardiness zone 7b · ZIP 74011 · elevation 195′ · NOAA & USDA data

Broken Arrow is in USDA hardiness zone 7b (winters can dip to 5 to 10°F), with a growing season of about 212 days between the average last spring frost (April 1) and first fall frost (November 1). The warmest month is July (avg high 94°F); the coldest is January (avg low 28.1°F). It averages 42.1″ of precipitation a year. Start cool-season crops several weeks before the last frost; wait until after it for tomatoes, peppers and other tender crops.

Hardiness zone

min temp 5 to 10°F

Last spring frost

April 1

avg (50% prob, 32°F)

First fall frost

November 1

avg (50% prob, 32°F)

Growing season

212 days

frost-free window

Warmest month

July

avg high 94°F

Month-by-month typical weather in Broken Arrow

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Tulsa R L Jones Jr Ap, OK (10.6 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	49.7	28.1	38.9	1.6	–
February	54.7	31.9	43.3	1.8	–
March	64	40.8	52.4	3.2	–
April	73.1	49.6	61.3	4.5	–
May	80.2	59.6	69.9	6.1	–
June	89	68.7	78.8	4.8	–
July	94	72.5	83.3	3.8	–
August	93.5	70.7	82.1	3.6	–
September	85.3	62.9	74.1	3.7	–
October	74.2	50.6	62.4	3.8	–
November	62.1	39.2	50.7	2.6	–
December	51.7	30.8	41.2	2.5	–

What to plant when in Broken Arrow

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: February 18 · Transplant out: April 8
Peppers	warm	Start seeds indoors: February 4 · Transplant out: April 15
Cucumbers	warm	Direct sow: April 8
Zucchini / squash	warm	Direct sow: April 8
Bush beans	warm	Direct sow: April 8
Sweet corn	warm	Direct sow: April 8
Basil	warm	Transplant out: April 8
Peas	cool	Sow (spring): February 25 · Sow (fall): September 6
Spinach	cool	Sow (spring): February 18 · Sow (fall): September 6
Lettuce	cool	Sow (spring): March 4 · Sow (fall): September 6
Kale	cool	Transplant (spring): March 11 · Sow (fall): August 23
Broccoli	cool	Transplant (spring): March 18
Carrots	cool	Sow (spring): March 11 · Sow (fall): August 23
Onions	cool	Transplant (spring): March 4
Potatoes	cool	Plant seed potatoes: March 18
Radishes	cool	Sow (spring): March 4 · Sow (fall): September 20

Dates are computed from Broken Arrow's average frost dates using standard cool-/warm-season timing. They're a starting point — a cold spring, a warm microclimate, or a fast-maturing variety can shift them by a week or two.

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Gear that helps you plant on time

Some links below are Amazon affiliate links (tag theboringthin-20). If you buy through them we may earn a small commission at no extra cost to you — it keeps this almanac free. We only list generic, genuinely-useful categories.

Soil thermometer →Know when the ground is warm enough to sow — the honest signal, not the calendar.Seed-starting trays + dome →Start tomatoes & peppers indoors on the schedule below.Seedling heat mat →Warms the soil for faster, more even germination indoors.Floating row cover / frost cloth →Buys you 4–8°F to beat an early or late frost.Raised garden bed kit →Warms and drains faster in spring than in-ground soil.Garden gloves →Basic kit for transplant day.

Nearby cities in Oklahoma

Tulsa, OK Muskogee, OK Stillwater, OK Norman, OK Edmond, OK Oklahoma City, OK Enid, OK Lawton, OK

Sources & method. Hardiness zone: 2023 USDA Plant Hardiness Zone Map (PRISM Climate Group, Oregon State University). Frost dates & growing season: NOAA/NCEI 1991–2020 U.S. Climate Normals, nearest station with published freeze normals — Bixby, OK, 4.1 mi (confidence: high). Monthly weather normals: Tulsa R L Jones Jr Ap, OK, 10.6 mi (confidence: high). ZIP centroid from U.S. Census 2023 ZCTA data. Frost dates are the 50%-probability date — half of years frost occurs outside the stated date. Nothing here is invented; where the nearest station is far, we say so. Last updated 2026-07-22.