Miami, AZ frost dates
Last spring frostFeb 24median date
First fall frostDec 1median date
Growing season280 daysfrost-free
Hardiness zone8aZone 8a
How Miami compares
- In 8 years out of 10, the last spring frost in Miami falls between January 30 and March 18, a 47-day window. The first fall frost falls between November 15 and December 15.
- The median last frost is 51 days earlier than the Arizona median of Apr 16.
- Its 280-day growing season is longer than 94% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 33 days earlier than the zone 8a median of Mar 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8a chart.
- The weather station records an average of 25 nights a year at or below 32°F.
- Nearby San Tan Valley, AZ, 65 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) | January 30 |
| 50% (median) | February 24 |
| 10% (safe for tender plants) | March 18 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 15 |
| 50% (median) | December 1 |
| 90% (late) | December 15 |
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 Miami, AZ
Miami, AZ frost dates — last frost Feb 24, first frost Dec 1, zone 8a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 2 to Dec 16Transplant outside: Jan 27 to Feb 10
Start indoors: Dec 16 to Dec 30Transplant outside: Mar 10 to Mar 24
Start indoors: Dec 16 to Dec 30Transplant outside: Mar 10 to Mar 24
Start indoors: Dec 30 to Jan 13Start indoors: Dec 30 to Jan 13Transplant outside: Mar 3 to Mar 17
Start indoors: Dec 30 to Jan 13Start indoors: Dec 30 to Jan 13Transplant outside: Feb 3 to Feb 17Sow outdoors: Jan 27 to Mar 3Plant for fall: Oct 6 to Nov 3
Start indoors: Dec 30 to Jan 13Start indoors: Dec 30 to Jan 13Transplant outside: Jan 27 to Feb 10Sow outdoors: Jan 27 to Feb 10Plant for fall: Sep 22 to Oct 13
Start indoors: Dec 30 to Jan 13Start indoors: Dec 30 to Jan 13Transplant outside: Feb 10 to Feb 24Plant for fall: Aug 25 to Sep 15
Start indoors: Dec 30 to Jan 13Start indoors: Dec 30 to Jan 13Transplant outside: Feb 3 to Feb 17Plant for fall: Aug 25 to Sep 15
Start indoors: Dec 30 to Jan 13Start indoors: Dec 30 to Jan 13Transplant outside: Feb 10 to Feb 24Plant for fall: Aug 25 to Sep 15
Start indoors: Jan 13 to Jan 27Transplant outside: Mar 17 to Mar 31Sow outdoors: Mar 17 to Mar 31
Start indoors: Jan 13 to Jan 27Transplant outside: Mar 3 to Mar 17
Sow outdoors: Jan 13 to Feb 3Plant for fall: Sep 8 to Sep 29
Sow outdoors: Jan 13 to Feb 3Plant for fall: Oct 6 to Oct 27
Sow outdoors: Jan 20 to Mar 3Plant for fall: Oct 20 to Nov 10
Start indoors: Jan 27 to Feb 3Transplant outside: Mar 10 to Mar 17Sow outdoors: Mar 3 to Mar 17Plant for fall: Sep 15 to Sep 29
Start indoors: Jan 27 to Feb 3Sow outdoors: Mar 3 to Mar 17Plant for fall: Sep 22 to Oct 6
Start indoors: Jan 27 to Feb 3Sow outdoors: Mar 3 to Mar 17
Start indoors: Jan 27 to Feb 3Transplant outside: Mar 10 to Mar 24
Sow outdoors: Feb 3 to Mar 3Plant for fall: Sep 8 to Sep 22
Sow outdoors: Feb 3 to Mar 3Plant for fall: Sep 22 to Oct 6
Sow outdoors: Feb 3 to Feb 24
Sow outdoors: Feb 10 to Mar 10Plant for fall: Sep 22 to Oct 6
Sow outdoors: Feb 10 to Mar 3Plant for fall: Oct 6 to Oct 27
Sow outdoors: Mar 3 to Mar 24Plant for fall: Sep 15 to Sep 29
Sow outdoors: Mar 3 to Mar 17
Transplant outside: Mar 10 to Mar 31
Plant for fall: Nov 17 to Dec 22
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Miami, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 2 – Dec 16 | Jan 27 – Feb 10 | — | — |
| Peppers | Dec 16 – Dec 30 | Mar 10 – Mar 24 | — | — |
| Eggplant | Dec 16 – Dec 30 | Mar 10 – Mar 24 | — | — |
| Tomatoes | Dec 30 – Jan 13 | Mar 3 – Mar 17 | — | — |
| Lettuce | Dec 30 – Jan 13 | Feb 3 – Feb 17 | Jan 27 – Mar 3 | Oct 6 – Nov 3 |
| Kale | Dec 30 – Jan 13 | Jan 27 – Feb 10 | Jan 27 – Feb 10 | Sep 22 – Oct 13 |
| Broccoli | Dec 30 – Jan 13 | Feb 10 – Feb 24 | — | Aug 25 – Sep 15 |
| Cabbage | Dec 30 – Jan 13 | Feb 3 – Feb 17 | — | Aug 25 – Sep 15 |
| Cauliflower | Dec 30 – Jan 13 | Feb 10 – Feb 24 | — | Aug 25 – Sep 15 |
| Okra | Jan 13 – Jan 27 | Mar 17 – Mar 31 | Mar 17 – Mar 31 | — |
| Basil | Jan 13 – Jan 27 | Mar 3 – Mar 17 | — | — |
| Peas | — | — | Jan 13 – Feb 3 | Sep 8 – Sep 29 |
| Spinach | — | — | Jan 13 – Feb 3 | Oct 6 – Oct 27 |
| Radishes | — | — | Jan 20 – Mar 3 | Oct 20 – Nov 10 |
| Cucumbers | Jan 27 – Feb 3 | Mar 10 – Mar 17 | Mar 3 – Mar 17 | Sep 15 – Sep 29 |
| Zucchini & Summer Squash | Jan 27 – Feb 3 | — | Mar 3 – Mar 17 | Sep 22 – Oct 6 |
| Winter Squash & Pumpkins | Jan 27 – Feb 3 | — | Mar 3 – Mar 17 | — |
| Melons & Watermelon | Jan 27 – Feb 3 | Mar 10 – Mar 24 | — | — |
| Carrots | — | — | Feb 3 – Mar 3 | Sep 8 – Sep 22 |
| Beets | — | — | Feb 3 – Mar 3 | Sep 22 – Oct 6 |
| Potatoes | — | — | Feb 3 – Feb 24 | — |
| Swiss Chard | — | — | Feb 10 – Mar 10 | Sep 22 – Oct 6 |
| Cilantro | — | — | Feb 10 – Mar 3 | Oct 6 – Oct 27 |
| Green Beans | — | — | Mar 3 – Mar 24 | Sep 15 – Sep 29 |
| Sweet Corn | — | — | Mar 3 – Mar 17 | — |
| Sweet Potatoes | — | Mar 10 – Mar 31 | — | — |
| Garlic | — | — | — | Nov 17 – Dec 22 |
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 Miami, AZ weather station, about 1 km away (elevation 3,560 ft (1,085 m)).
Frost dates near Miami
- Claypool Mar 11 · Nov 21
- Globe Mar 11 · Nov 21
- Superior Jan 18 · Dec 28
- Roosevelt Jan 17 · Dec 25
- Kearny Jan 18 · Dec 28
- San Carlos Mar 13 · Nov 19
- Peridot Mar 13 · Nov 19
- Hayden Mar 13 · Nov 19
- Winkelman Mar 13 · Nov 19
- Gold Canyon Feb 11 · Dec 10
Frequently asked questions
When is the last frost in Miami, AZ?
The median last spring frost in Miami, AZ is February 24. There is still about a 10% chance of frost after March 18, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Miami, AZ?
The median first fall frost is December 1, with about a 10% chance of frost before November 15.
How long is the growing season in Miami, AZ?
About 280 days between the median last spring frost and first fall frost.
What planting zone is Miami, AZ?
Miami, AZ is in USDA hardiness zone 8a.