Arizona City, AZ frost dates
Last spring frostFeb 28median date
First fall frostNov 21median date
Growing season266 daysfrost-free
Hardiness zone9aZone 9a
How Arizona City compares
- In 8 years out of 10, the last spring frost in Arizona City falls between February 3 and March 14, a 39-day window. The first fall frost falls between November 5 and December 6.
- The median last frost is 47 days earlier than the Arizona median of Apr 16.
- Its 266-day growing season is longer than 89% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is typical for zone 9a, where the median is Mar 3.
- The weather station records an average of 33 nights a year at or below 32°F.
- Nearby Casa Grande, AZ, 13 km away, gets only light, occasional frost, a reminder of how much elevation and distance from the coast matter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 3 |
| 50% (median) | February 28 |
| 10% (safe for tender plants) | March 14 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 5 |
| 50% (median) | November 21 |
| 90% (late) | December 6 |
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 Arizona City, AZ
Arizona City, AZ frost dates — last frost Feb 28, first frost Nov 21, zone 9a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 6 to Dec 20Transplant outside: Jan 31 to Feb 14
Start indoors: Dec 20 to Jan 3Start indoors: Dec 20 to Jan 3Transplant outside: Mar 14 to Mar 28
Start indoors: Dec 20 to Jan 3Start indoors: Dec 20 to Jan 3Transplant outside: Mar 14 to Mar 28
Start indoors: Jan 3 to Jan 17Transplant outside: Mar 7 to Mar 21
Start indoors: Jan 3 to Jan 17Transplant outside: Feb 7 to Feb 21Sow outdoors: Jan 31 to Mar 7Plant for fall: Sep 26 to Oct 24
Start indoors: Jan 3 to Jan 17Transplant outside: Jan 31 to Feb 14Sow outdoors: Jan 31 to Feb 14Plant for fall: Sep 12 to Oct 3
Start indoors: Jan 3 to Jan 17Transplant outside: Feb 14 to Feb 28Plant for fall: Aug 15 to Sep 5
Start indoors: Jan 3 to Jan 17Transplant outside: Feb 7 to Feb 21Plant for fall: Aug 15 to Sep 5
Start indoors: Jan 3 to Jan 17Transplant outside: Feb 14 to Feb 28Plant for fall: Aug 15 to Sep 5
Start indoors: Jan 17 to Jan 31Transplant outside: Mar 21 to Apr 4Sow outdoors: Mar 21 to Apr 4
Start indoors: Jan 17 to Jan 31Transplant outside: Mar 7 to Mar 21
Sow outdoors: Jan 17 to Feb 7Plant for fall: Aug 29 to Sep 19
Sow outdoors: Jan 17 to Feb 7Plant for fall: Sep 26 to Oct 17
Sow outdoors: Jan 24 to Mar 7Plant for fall: Oct 10 to Oct 31
Start indoors: Jan 31 to Feb 7Transplant outside: Mar 14 to Mar 21Sow outdoors: Mar 7 to Mar 21Plant for fall: Sep 5 to Sep 19
Start indoors: Jan 31 to Feb 7Sow outdoors: Mar 7 to Mar 21Plant for fall: Sep 12 to Sep 26
Start indoors: Jan 31 to Feb 7Sow outdoors: Mar 7 to Mar 21
Start indoors: Jan 31 to Feb 7Transplant outside: Mar 14 to Mar 28
Sow outdoors: Feb 7 to Mar 7Plant for fall: Aug 29 to Sep 12
Sow outdoors: Feb 7 to Mar 7Plant for fall: Sep 12 to Sep 26
Sow outdoors: Feb 7 to Feb 28
Sow outdoors: Feb 14 to Mar 14Plant for fall: Sep 12 to Sep 26
Sow outdoors: Feb 14 to Mar 7Plant for fall: Sep 26 to Oct 17
Sow outdoors: Mar 7 to Mar 28Plant for fall: Sep 5 to Sep 19
Sow outdoors: Mar 7 to Mar 21
Transplant outside: Mar 14 to Apr 4
Plant for fall: Nov 7 to Dec 12
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Arizona City, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 6 – Dec 20 | Jan 31 – Feb 14 | — | — |
| Peppers | Dec 20 – Jan 3 | Mar 14 – Mar 28 | — | — |
| Eggplant | Dec 20 – Jan 3 | Mar 14 – Mar 28 | — | — |
| Tomatoes | Jan 3 – Jan 17 | Mar 7 – Mar 21 | — | — |
| Lettuce | Jan 3 – Jan 17 | Feb 7 – Feb 21 | Jan 31 – Mar 7 | Sep 26 – Oct 24 |
| Kale | Jan 3 – Jan 17 | Jan 31 – Feb 14 | Jan 31 – Feb 14 | Sep 12 – Oct 3 |
| Broccoli | Jan 3 – Jan 17 | Feb 14 – Feb 28 | — | Aug 15 – Sep 5 |
| Cabbage | Jan 3 – Jan 17 | Feb 7 – Feb 21 | — | Aug 15 – Sep 5 |
| Cauliflower | Jan 3 – Jan 17 | Feb 14 – Feb 28 | — | Aug 15 – Sep 5 |
| Okra | Jan 17 – Jan 31 | Mar 21 – Apr 4 | Mar 21 – Apr 4 | — |
| Basil | Jan 17 – Jan 31 | Mar 7 – Mar 21 | — | — |
| Peas | — | — | Jan 17 – Feb 7 | Aug 29 – Sep 19 |
| Spinach | — | — | Jan 17 – Feb 7 | Sep 26 – Oct 17 |
| Radishes | — | — | Jan 24 – Mar 7 | Oct 10 – Oct 31 |
| Cucumbers | Jan 31 – Feb 7 | Mar 14 – Mar 21 | Mar 7 – Mar 21 | Sep 5 – Sep 19 |
| Zucchini & Summer Squash | Jan 31 – Feb 7 | — | Mar 7 – Mar 21 | Sep 12 – Sep 26 |
| Winter Squash & Pumpkins | Jan 31 – Feb 7 | — | Mar 7 – Mar 21 | — |
| Melons & Watermelon | Jan 31 – Feb 7 | Mar 14 – Mar 28 | — | — |
| Carrots | — | — | Feb 7 – Mar 7 | Aug 29 – Sep 12 |
| Beets | — | — | Feb 7 – Mar 7 | Sep 12 – Sep 26 |
| Potatoes | — | — | Feb 7 – Feb 28 | — |
| Swiss Chard | — | — | Feb 14 – Mar 14 | Sep 12 – Sep 26 |
| Cilantro | — | — | Feb 14 – Mar 7 | Sep 26 – Oct 17 |
| Green Beans | — | — | Mar 7 – Mar 28 | Sep 5 – Sep 19 |
| Sweet Corn | — | — | Mar 7 – Mar 21 | — |
| Sweet Potatoes | — | Mar 14 – Apr 4 | — | — |
| Garlic | — | — | — | Nov 7 – Dec 12 |
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 Arizona City, AZ weather station, 3 km away (elevation 1,526 ft (465 m)).
Frost dates near Arizona City
- Eloy Feb 24 · Nov 28
- Casa Grande Feb 5 · Dec 6
- Picacho Feb 6 · Dec 9
- Coolidge Feb 17 · Nov 29
- Stanfield Feb 5 · Dec 6
- Valley Farms Jan 30 · Dec 12
- Red Rock Feb 6 · Dec 9
- Maricopa Feb 23 · Nov 24
- Florence Jan 30 · Dec 12
- Sacaton Feb 1 · Dec 11
Frequently asked questions
When is the last frost in Arizona City, AZ?
The median last spring frost in Arizona City, AZ is February 28. There is still about a 10% chance of frost after March 14, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Arizona City, AZ?
The median first fall frost is November 21, with about a 10% chance of frost before November 5.
How long is the growing season in Arizona City, AZ?
About 266 days between the median last spring frost and first fall frost.
What planting zone is Arizona City, AZ?
Arizona City, AZ is in USDA hardiness zone 9a.