When is the last frost in Goodyear, AZ?

The average last spring frost (50% probability of 32°F) in Goodyear is around January 7, based on NOAA/NCEI 1991–2020 normals at the Litchfield Park, AZ station (2.7 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 Goodyear?

The average first fall frost in Goodyear, AZ is around December 24, giving roughly a 351-day frost-free growing season.

What planting zone is Goodyear, AZ?

Goodyear 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 Goodyear?

In Goodyear, AZ the warmest month is July (avg high 106.5°F) and the coldest is December (avg low 42°F). It averages about 8.2″ of precipitation a year.

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Goodyear, AZ Planting Calendar & Frost Dates

USDA hardiness zone 9b · ZIP 85395 · elevation 317′ · NOAA & USDA data

Goodyear is in USDA hardiness zone 9b (winters can dip to 25 to 30°F), with a growing season of about 351 days between the average last spring frost (January 7) and first fall frost (December 24). The warmest month is July (avg high 106.5°F); the coldest is December (avg low 42°F). It averages 8.2″ 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 7

avg (50% prob, 32°F)

First fall frost

December 24

avg (50% prob, 32°F)

Growing season

351 days

frost-free window

Warmest month

July

avg high 106.5°F

Month-by-month typical weather in Goodyear

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Litchfield Park, AZ (2.7 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)
January	66.1	42.9	54.5	1
February	70.2	45.9	58.1	1.2
March	77.7	51.2	64.4	1
April	85.5	57	71.3	0.3
May	94.3	65.3	79.8	0.1
June	104	73.7	88.8	0
July	106.5	81.2	93.8	0.8
August	104.7	80.6	92.6	1.1
September	99.3	73.8	86.5	0.8
October	88.1	60.9	74.5	0.6
November	74.6	49.3	61.9	0.6
December	64.5	42	53.2	0.9

What to plant when in Goodyear

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: November 26 · Transplant out: January 14
Peppers	warm	Start seeds indoors: November 12 · Transplant out: January 21
Cucumbers	warm	Direct sow: January 14
Zucchini / squash	warm	Direct sow: January 14
Bush beans	warm	Direct sow: January 14
Sweet corn	warm	Direct sow: January 14
Basil	warm	Transplant out: January 14
Peas	cool	Sow (spring): December 3 · Sow (fall): October 29
Spinach	cool	Sow (spring): November 26 · Sow (fall): October 29
Lettuce	cool	Sow (spring): December 10 · Sow (fall): October 29
Kale	cool	Transplant (spring): December 17 · Sow (fall): October 15
Broccoli	cool	Transplant (spring): December 24
Carrots	cool	Sow (spring): December 17 · Sow (fall): October 15
Onions	cool	Transplant (spring): December 10
Potatoes	cool	Plant seed potatoes: December 24
Radishes	cool	Sow (spring): December 10 · Sow (fall): November 12

Dates are computed from Goodyear'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 — Litchfield Park, AZ, 2.7 mi (confidence: high). Monthly weather normals: Litchfield Park, AZ, 2.7 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.