Morenci, AZ frost dates
Last spring frostFeb 26median date
First fall frostNov 23median date
Growing season270 daysfrost-free
Hardiness zone8bZone 8b
How Morenci compares
- In 8 years out of 10, the last spring frost in Morenci falls between February 6 and March 15, a 37-day window. The first fall frost falls between November 10 and December 6.
- The median last frost is 49 days earlier than the Arizona median of Apr 16.
- Its 270-day growing season is longer than 90% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 18 days earlier than the zone 8b median of Mar 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8b chart.
- The weather station records an average of 30 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 6 |
| 50% (median) | February 26 |
| 10% (safe for tender plants) | March 15 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 10 |
| 50% (median) | November 23 |
| 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 Morenci, AZ
Morenci, AZ frost dates — last frost Feb 26, first frost Nov 23, zone 8b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 4 to Dec 18Transplant outside: Jan 29 to Feb 12
Start indoors: Dec 18 to Jan 1Start indoors: Dec 18 to Jan 1Transplant outside: Mar 12 to Mar 26
Start indoors: Dec 18 to Jan 1Start indoors: Dec 18 to Jan 1Transplant outside: Mar 12 to Mar 26
Start indoors: Jan 1 to Jan 15Transplant outside: Mar 5 to Mar 19
Start indoors: Jan 1 to Jan 15Transplant outside: Feb 5 to Feb 19Sow outdoors: Jan 29 to Mar 5Plant for fall: Sep 28 to Oct 26
Start indoors: Jan 1 to Jan 15Transplant outside: Jan 29 to Feb 12Sow outdoors: Jan 29 to Feb 12Plant for fall: Sep 14 to Oct 5
Start indoors: Jan 1 to Jan 15Transplant outside: Feb 12 to Feb 26Plant for fall: Aug 17 to Sep 7
Start indoors: Jan 1 to Jan 15Transplant outside: Feb 5 to Feb 19Plant for fall: Aug 17 to Sep 7
Start indoors: Jan 1 to Jan 15Transplant outside: Feb 12 to Feb 26Plant for fall: Aug 17 to Sep 7
Start indoors: Jan 15 to Jan 29Transplant outside: Mar 19 to Apr 2Sow outdoors: Mar 19 to Apr 2
Start indoors: Jan 15 to Jan 29Transplant outside: Mar 5 to Mar 19
Sow outdoors: Jan 15 to Feb 5Plant for fall: Aug 31 to Sep 21
Sow outdoors: Jan 15 to Feb 5Plant for fall: Sep 28 to Oct 19
Sow outdoors: Jan 22 to Mar 5Plant for fall: Oct 12 to Nov 2
Start indoors: Jan 29 to Feb 5Transplant outside: Mar 12 to Mar 19Sow outdoors: Mar 5 to Mar 19Plant for fall: Sep 7 to Sep 21
Start indoors: Jan 29 to Feb 5Sow outdoors: Mar 5 to Mar 19Plant for fall: Sep 14 to Sep 28
Start indoors: Jan 29 to Feb 5Sow outdoors: Mar 5 to Mar 19
Start indoors: Jan 29 to Feb 5Transplant outside: Mar 12 to Mar 26
Sow outdoors: Feb 5 to Mar 5Plant for fall: Aug 31 to Sep 14
Sow outdoors: Feb 5 to Mar 5Plant for fall: Sep 14 to Sep 28
Sow outdoors: Feb 5 to Feb 26
Sow outdoors: Feb 12 to Mar 12Plant for fall: Sep 14 to Sep 28
Sow outdoors: Feb 12 to Mar 5Plant for fall: Sep 28 to Oct 19
Sow outdoors: Mar 5 to Mar 26Plant for fall: Sep 7 to Sep 21
Sow outdoors: Mar 5 to Mar 19
Transplant outside: Mar 12 to Apr 2
Plant for fall: Nov 9 to Dec 14
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Morenci, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 4 – Dec 18 | Jan 29 – Feb 12 | — | — |
| Peppers | Dec 18 – Jan 1 | Mar 12 – Mar 26 | — | — |
| Eggplant | Dec 18 – Jan 1 | Mar 12 – Mar 26 | — | — |
| Tomatoes | Jan 1 – Jan 15 | Mar 5 – Mar 19 | — | — |
| Lettuce | Jan 1 – Jan 15 | Feb 5 – Feb 19 | Jan 29 – Mar 5 | Sep 28 – Oct 26 |
| Kale | Jan 1 – Jan 15 | Jan 29 – Feb 12 | Jan 29 – Feb 12 | Sep 14 – Oct 5 |
| Broccoli | Jan 1 – Jan 15 | Feb 12 – Feb 26 | — | Aug 17 – Sep 7 |
| Cabbage | Jan 1 – Jan 15 | Feb 5 – Feb 19 | — | Aug 17 – Sep 7 |
| Cauliflower | Jan 1 – Jan 15 | Feb 12 – Feb 26 | — | Aug 17 – Sep 7 |
| Okra | Jan 15 – Jan 29 | Mar 19 – Apr 2 | Mar 19 – Apr 2 | — |
| Basil | Jan 15 – Jan 29 | Mar 5 – Mar 19 | — | — |
| Peas | — | — | Jan 15 – Feb 5 | Aug 31 – Sep 21 |
| Spinach | — | — | Jan 15 – Feb 5 | Sep 28 – Oct 19 |
| Radishes | — | — | Jan 22 – Mar 5 | Oct 12 – Nov 2 |
| Cucumbers | Jan 29 – Feb 5 | Mar 12 – Mar 19 | Mar 5 – Mar 19 | Sep 7 – Sep 21 |
| Zucchini & Summer Squash | Jan 29 – Feb 5 | — | Mar 5 – Mar 19 | Sep 14 – Sep 28 |
| Winter Squash & Pumpkins | Jan 29 – Feb 5 | — | Mar 5 – Mar 19 | — |
| Melons & Watermelon | Jan 29 – Feb 5 | Mar 12 – Mar 26 | — | — |
| Carrots | — | — | Feb 5 – Mar 5 | Aug 31 – Sep 14 |
| Beets | — | — | Feb 5 – Mar 5 | Sep 14 – Sep 28 |
| Potatoes | — | — | Feb 5 – Feb 26 | — |
| Swiss Chard | — | — | Feb 12 – Mar 12 | Sep 14 – Sep 28 |
| Cilantro | — | — | Feb 12 – Mar 5 | Sep 28 – Oct 19 |
| Green Beans | — | — | Mar 5 – Mar 26 | Sep 7 – Sep 21 |
| Sweet Corn | — | — | Mar 5 – Mar 19 | — |
| Sweet Potatoes | — | Mar 12 – Apr 2 | — | — |
| Garlic | — | — | — | Nov 9 – Dec 14 |
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 Clifton, AZ weather station, 6 km away (elevation 3,520 ft (1,073 m)).
Frost dates near Morenci
- Clifton Feb 26 · Nov 23
- Duncan Apr 24 · Oct 25
- Solomon Mar 25 · Nov 9
- Safford Mar 25 · Nov 9
- Thatcher Mar 25 · Nov 9
- Central Mar 25 · Nov 9
- Pima Apr 1 · Nov 6
- Eden Apr 1 · Nov 6
- Fort Thomas Apr 1 · Nov 6
- Blue Jun 17 · Sep 21
Frequently asked questions
When is the last frost in Morenci, AZ?
The median last spring frost in Morenci, AZ is February 26. There is still about a 10% chance of frost after March 15, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Morenci, AZ?
The median first fall frost is November 23, with about a 10% chance of frost before November 10.
How long is the growing season in Morenci, AZ?
About 270 days between the median last spring frost and first fall frost.
What planting zone is Morenci, AZ?
Morenci, AZ is in USDA hardiness zone 8b.