Frost dates for 85193 — Casa Grande, AZ
Frost is light and occasional here — typically a few cold nights around midwinter (about 17 a year). Cover tender plants when frost is forecast.
How Casa Grande compares
- In a typical year, frost nights in Casa Grande fall between December 6 and February 5. In 1 year in 10 the first frost comes as early as November 18, or the last frost as late as February 28.
- Compared with San Tan Valley, AZ, 45 km away, the last frost here is 4 days later than there.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | January 5 |
| 50% (median) | February 5 |
| 10% (safe for tender plants) | February 28 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 18 |
| 50% (median) | December 6 |
| 90% (late) | December 29 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Casa Grande, AZ
Frost dates for 85193 — Casa Grande, AZ — last frost Feb 5, first frost Dec 6, zone 9a. whenisthelastfrost.com
In mild climates, summer heat limits many crops as much as frost does. Use this calendar for spring planting and lean on fall and winter for cool-season crops.
When to plant vegetables in Casa Grande, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 13 – Nov 27 | Jan 8 – Jan 22 | — | — |
| Peppers | Nov 27 – Dec 11 | Feb 19 – Mar 5 | — | — |
| Eggplant | Nov 27 – Dec 11 | Feb 19 – Mar 5 | — | — |
| Tomatoes | Dec 11 – Dec 25 | Feb 12 – Feb 26 | — | — |
| Lettuce | Dec 11 – Dec 25 | Jan 15 – Jan 29 | Jan 8 – Feb 12 | Oct 11 – Nov 8 |
| Kale | Dec 11 – Dec 25 | Jan 8 – Jan 22 | Jan 8 – Jan 22 | Sep 27 – Oct 18 |
| Broccoli | Dec 11 – Dec 25 | Jan 22 – Feb 5 | — | Aug 30 – Sep 20 |
| Cabbage | Dec 11 – Dec 25 | Jan 15 – Jan 29 | — | Aug 30 – Sep 20 |
| Cauliflower | Dec 11 – Dec 25 | Jan 22 – Feb 5 | — | Aug 30 – Sep 20 |
| Okra | Dec 25 – Jan 8 | Feb 26 – Mar 12 | Feb 26 – Mar 12 | — |
| Basil | Dec 25 – Jan 8 | Feb 12 – Feb 26 | — | — |
| Peas | — | — | Dec 25 – Jan 15 | Sep 13 – Oct 4 |
| Spinach | — | — | Dec 25 – Jan 15 | Oct 11 – Nov 1 |
| Radishes | — | — | Jan 1 – Feb 12 | Oct 25 – Nov 15 |
| Cucumbers | Jan 8 – Jan 15 | Feb 19 – Feb 26 | Feb 12 – Feb 26 | Sep 20 – Oct 4 |
| Zucchini & Summer Squash | Jan 8 – Jan 15 | — | Feb 12 – Feb 26 | Sep 27 – Oct 11 |
| Winter Squash & Pumpkins | Jan 8 – Jan 15 | — | Feb 12 – Feb 26 | — |
| Melons & Watermelon | Jan 8 – Jan 15 | Feb 19 – Mar 5 | — | — |
| Carrots | — | — | Jan 15 – Feb 12 | Sep 13 – Sep 27 |
| Beets | — | — | Jan 15 – Feb 12 | Sep 27 – Oct 11 |
| Potatoes | — | — | Jan 15 – Feb 5 | — |
| Swiss Chard | — | — | Jan 22 – Feb 19 | Sep 27 – Oct 11 |
| Cilantro | — | — | Jan 22 – Feb 12 | Oct 11 – Nov 1 |
| Green Beans | — | — | Feb 12 – Mar 5 | Sep 20 – Oct 4 |
| Sweet Corn | — | — | Feb 12 – Feb 26 | — |
| Sweet Potatoes | — | Feb 19 – Mar 12 | — | — |
| Garlic | — | — | — | Nov 22 – Dec 27 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Casa Grande, AZ weather station, 8 km away (elevation 1,401 ft (427 m)).
ZIP codes in Casa Grande: 85122 85130 85193 85194
Frost dates near Casa Grande
- Stanfield Feb 5 · Dec 6
- Arizona City Feb 28 · Nov 21
- Eloy Feb 24 · Nov 28
- Maricopa Feb 23 · Nov 24
- Coolidge Feb 17 · Nov 29
- Sacaton Feb 1 · Dec 11
- Bapchule Feb 23 · Nov 24
- Valley Farms Jan 30 · Dec 12
Frequently asked questions
When is the last frost in Casa Grande, AZ?
The median last spring frost in Casa Grande, AZ is February 5. There is still about a 10% chance of frost after February 28, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Casa Grande, AZ?
The median first fall frost is December 6, with about a 10% chance of frost before November 18.
How long is the growing season in Casa Grande, AZ?
About 304 days between the median last spring frost and first fall frost.
What planting zone is Casa Grande, AZ?
Casa Grande, AZ is in USDA hardiness zone 9a.