Frost Dates for Buckeye, AZ

In Buckeye, AZ, the average last spring frost is around Jan 7 and the average first fall frost around Dec 24, for a growing season of about 351 days. For frost-tender plants, wait until Feb 5, when the chance of frost drops to 10%.

Average last frostJan 750% chance of frost after this date
Safe to plantFeb 5only a 10% chance of frost after
Average first frostDec 2450% chance of frost before this date
Growing season351 daysfrost-free in an average year

Based on NOAA 1991–2020 records from the Litchfield Park, AZ weather station, 17 miles away, elevation 1,040 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.

Frost probability by date

Chance of a 32°F frost after the spring date, or before the fall date.

ChanceLast spring frostFirst fall frost
10%Feb 5Dec 6
20%Jan 26Dec 11
30%Jan 18Dec 16
40%Jan 12Dec 20
50%Jan 7Dec 24
60%Jan 3Dec 28
70%Dec 30Jan 1
80%Dec 24Jan 6
90%Dec 17Jan 16

Light frost vs. hard freeze

Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.

TemperatureLast in springFirst in fall
Light frost (36°F)Jan 31Dec 9
Frost / freeze (32°F)Jan 7Dec 24
Hard freeze (28°F)Jan 5Jan 4

Planting calendar for Buckeye

Start indoors Plant outside Fall planting
JanFebMarAprMayJunJulAugSepOctNovDec
Tomatoes
Indoors Nov 12 – Nov 26
Transplant Jan 14 – Jan 28
Peppers
Indoors Oct 29 – Nov 12
Transplant Jan 21 – Feb 4
Eggplant
Indoors Oct 29 – Nov 12
Transplant Jan 21 – Feb 4
Basil
Indoors Nov 26 – Dec 10
Transplant Jan 14 – Jan 28
Cucumbers
Indoors Dec 10 – Dec 17
Sow or transplant Jan 14 – Jan 28
Zucchini and summer squash
Indoors Dec 10 – Dec 17
Sow or transplant Jan 14 – Jan 28
Pumpkins and winter squash
Sow Jan 14 – Jan 28
Watermelons and melons
Indoors Dec 10 – Dec 17
Sow or transplant Jan 21 – Feb 4
Green beans
Sow Jan 14 – Jan 28
Sweet corn
Sow Jan 14 – Jan 28
Lettuce
Indoors Nov 26 – Dec 10
Sow or transplant Dec 10 – Dec 24
Fall sowing Oct 29 – Nov 26
Spinach
Sow Nov 26 – Dec 17
Fall sowing Oct 29 – Nov 19
Peas
Sow Nov 26 – Dec 10
Fall sowing Oct 15 – Oct 29
Kale
Indoors Nov 12 – Nov 26
Sow or transplant Dec 10 – Dec 24
Fall sowing Oct 15 – Nov 12
Broccoli
Indoors Nov 12 – Nov 26
Transplant Dec 24 – Jan 7
Fall sowing Oct 1 – Oct 15
Cabbage
Indoors Nov 12 – Nov 26
Transplant Dec 17 – Dec 31
Fall sowing Oct 1 – Oct 15
Carrots
Sow Dec 17 – Jan 7
Fall sowing Oct 1 – Oct 15
Radishes
Sow Dec 3 – Dec 24
Fall sowing Nov 12 – Dec 3
Beets
Sow Dec 17 – Jan 7
Fall sowing Oct 15 – Oct 29
Onions (sets or transplants)
Indoors Oct 15 – Oct 29
Plant Dec 10 – Dec 24
Potatoes
Plant Dec 17 – Dec 31
Garlic
Plant Dec 24 – Jan 21

Based on the average last frost (Jan 7) and first frost (Dec 24). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.

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