Frost dates for Coolidge, 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 17
typical year
Safe to plant
March 8
frost is over in 9 of 10 years
First fall frost
November 29
typical year
Growing season
284 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 20 – Feb 3 | – |
| Spinach | – | Jan 6 – 27 | Oct 4 – 18 |
| Lettuce | – | Jan 20 – Feb 10 | Oct 4 – 18 |
| Radishes | – | Jan 20 – Mar 3 | Oct 18 – Nov 1 |
| Onions | – | Jan 20 – Feb 3 | – |
| Potatoes | – | Jan 27 – Feb 10 | – |
| Carrots | – | Jan 27 – Feb 17 | Sep 6 – 20 |
| Beets | – | Jan 20 – Feb 3 | Sep 20 – Oct 4 |
| Kale | Dec 9 – 23 | Jan 20 – Feb 3 | Sep 20 – Oct 4 |
| Broccoli | Dec 9 – 23 | Feb 3 – 17 | Sep 20 – Oct 4 |
| Cabbage | Nov 25 – Dec 9 | Jan 20 – Feb 3 | Sep 20 – Oct 4 |
| Garlic | – | – | Oct 18 – Nov 8 |
| Warm-season crops | |||
| Tomatoes | Jan 11 – 25 | Mar 8 – 22 | – |
| Peppers | Jan 4 – 18 | Mar 15 – 29 | – |
| Cucumbers | – | Mar 8 – 29 | – |
| Zucchini | – | Mar 8 – Apr 5 | – |
| Pumpkins | – | Mar 8 – 29 | – |
| Green beans | – | Mar 8 – Sep 20 | – |
| Sweet corn | – | Mar 8 – Apr 5 | – |
| Basil | Feb 1 – 15 | Mar 15 – 22 | – |
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 | March 8 | February 17 | January 22 |
| Fall frost before | November 12 | November 29 | December 15 |
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 26 (February 23 in a late year), and the first one in fall around December 12.
Towns that use these dates
This is the nearest NOAA station with frost records for 1 town.
Coolidge
Where these dates come from
NOAA weather station CASA GRANDE NM, AZ US (USC00021314), 1991–2020 climate normals. It's the nearest station for 1 zip code, all within 3 miles:
85128
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.