Frost dates for Mesa, AZ
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
February 1
typical year
Safe to plant
February 28
frost is over in 9 of 10 years
First fall frost
December 10
typical year
Growing season
312 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | Jan 4 – 18 | – |
| Spinach | – | Dec 21 – Jan 11 | Oct 15 – 29 |
| Lettuce | – | Jan 4 – 25 | Oct 15 – 29 |
| Radishes | – | Jan 4 – Feb 15 | Oct 29 – Nov 12 |
| Onions | – | Jan 4 – 18 | – |
| Potatoes | – | Jan 11 – 25 | – |
| Carrots | – | Jan 11 – Feb 1 | Sep 17 – Oct 1 |
| Beets | – | Jan 4 – 18 | Oct 1 – 15 |
| Kale | Nov 23 – Dec 7 | Jan 4 – 18 | Oct 1 – 15 |
| Broccoli | Nov 23 – Dec 7 | Jan 18 – Feb 1 | Oct 1 – 15 |
| Cabbage | Nov 9 – 23 | Jan 4 – 18 | Oct 1 – 15 |
| Garlic | – | – | Oct 29 – Nov 19 |
| Warm-season crops | |||
| Tomatoes | Jan 3 – 17 | Feb 28 – Mar 14 | – |
| Peppers | Dec 27 – Jan 10 | Mar 7 – 21 | – |
| Cucumbers | – | Feb 28 – Mar 21 | – |
| Zucchini | – | Feb 28 – Mar 28 | – |
| Pumpkins | – | Feb 28 – Mar 21 | – |
| Green beans | – | Feb 28 – Oct 1 | – |
| Sweet corn | – | Feb 28 – Mar 28 | – |
| Basil | Jan 24 – Feb 7 | Mar 7 – 14 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | February 28 | February 1 | January 1 |
| Fall frost before | November 22 | December 10 | January 1 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around January 11 (February 11 in a late year), and the first one in fall around December 26.
Towns that use these dates
This is the nearest NOAA station with frost records for 1 town.
Mesa
Where these dates come from
NOAA weather station E MESA, AZ US (USC00022782), 1991–2020 climate normals. It's the nearest station for 11 zip codes, all within 9 miles:
85120, 85205, 85206, 85207, 85208, 85209, 85212, 85213, 85234, 85236, 85296
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.