When is the last frost in Buckeye, AZ?

The average last spring frost (50% probability of 32°F) in Buckeye is around January 23, based on NOAA/NCEI 1991–2020 normals at the Gila Bend 2se, AZ station (20.9 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 Buckeye?

The average first fall frost in Buckeye, AZ is around December 11, giving roughly a 323-day frost-free growing season.

What planting zone is Buckeye, AZ?

Buckeye is in USDA plant hardiness zone 9b (average annual extreme minimum temperature 25 to 30°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Buckeye?

In Buckeye, AZ the warmest month is July (avg high 109.2°F) and the coldest is December (avg low 40°F). It averages about 6.3″ of precipitation a year.

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Buckeye, AZ Planting Calendar & Frost Dates

USDA hardiness zone 9b · ZIP 85326 · elevation 242′ · NOAA & USDA data

Buckeye is in USDA hardiness zone 9b (winters can dip to 25 to 30°F), with a growing season of about 323 days between the average last spring frost (January 23) and first fall frost (December 11). The warmest month is July (avg high 109.2°F); the coldest is December (avg low 40°F). It averages 6.3″ 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 25 to 30°F

Last spring frost

January 23

avg (50% prob, 32°F)

First fall frost

December 11

avg (50% prob, 32°F)

Growing season

323 days

frost-free window

Warmest month

July

avg high 109.2°F

Month-by-month typical weather in Buckeye

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Gila Bend 2se, AZ (20.9 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)
January	71.1	41.3	56.2	0.8
February	74.8	44.3	59.6	0.9
March	81.8	49.3	65.6	0.7
April	89.5	54.7	72.1	0.3
May	97.8	62.7	80.3	0.4
June	107.3	71.7	89.5	0.1
July	109.2	80.7	95	0.6
August	108.6	80.6	94.6	0.9
September	103.7	73.6	88.7	0.3
October	92.9	60.1	76.5	0.4
November	79.7	47.9	63.8	0.5
December	69.5	40	54.8	0.6

What to plant when in Buckeye

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: December 12 · Transplant out: January 30
Peppers	warm	Start seeds indoors: November 28 · Transplant out: February 6
Cucumbers	warm	Direct sow: January 30
Zucchini / squash	warm	Direct sow: January 30
Bush beans	warm	Direct sow: January 30
Sweet corn	warm	Direct sow: January 30
Basil	warm	Transplant out: January 30
Peas	cool	Sow (spring): December 19 · Sow (fall): October 16
Spinach	cool	Sow (spring): December 12 · Sow (fall): October 16
Lettuce	cool	Sow (spring): December 26 · Sow (fall): October 16
Kale	cool	Transplant (spring): January 2 · Sow (fall): October 2
Broccoli	cool	Transplant (spring): January 9
Carrots	cool	Sow (spring): January 2 · Sow (fall): October 2
Onions	cool	Transplant (spring): December 26
Potatoes	cool	Plant seed potatoes: January 9
Radishes	cool	Sow (spring): December 26 · Sow (fall): October 30

Dates are computed from Buckeye'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.

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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 — Gila Bend 2se, AZ, 20.9 mi (confidence: medium). Monthly weather normals: Gila Bend 2se, AZ, 20.9 mi (confidence: medium). 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.