Lukachukai, AZ frost dates
Last spring frostMay 3median date
First fall frostOct 17median date
Growing season167 daysfrost-free
Hardiness zone7aZone 7a
How Lukachukai compares
- In 8 years out of 10, the last spring frost in Lukachukai falls between April 21 and May 22, a 31-day window. The first fall frost falls between October 2 and October 30.
- The median last frost is 17 days later than the Arizona median of Apr 16.
- Its 167-day growing season is longer than 34% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 17 days later than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 146 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 21 |
| 50% (median) | May 3 |
| 10% (safe for tender plants) | May 22 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 2 |
| 50% (median) | October 17 |
| 90% (late) | October 30 |
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 Lukachukai, AZ
Lukachukai, AZ frost dates — last frost May 3, first frost Oct 17, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Feb 8 to Feb 22Transplant outside: Apr 5 to Apr 19
Start indoors: Feb 22 to Mar 8Transplant outside: May 17 to May 31
Start indoors: Feb 22 to Mar 8Transplant outside: May 17 to May 31
Start indoors: Mar 8 to Mar 22Transplant outside: May 10 to May 24
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 12 to Apr 26Sow outdoors: Apr 5 to May 10Plant for fall: Aug 22 to Sep 19
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 5 to Apr 19Sow outdoors: Apr 5 to Apr 19Plant for fall: Aug 8 to Aug 29
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 19 to May 3Plant for fall: Jul 11 to Aug 1
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 12 to Apr 26Plant for fall: Jul 11 to Aug 1
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 19 to May 3Plant for fall: Jul 11 to Aug 1
Start indoors: Mar 22 to Apr 5Transplant outside: May 24 to Jun 7Sow outdoors: May 24 to Jun 7
Start indoors: Mar 22 to Apr 5Transplant outside: May 10 to May 24
Sow outdoors: Mar 22 to Apr 12Plant for fall: Jul 25 to Aug 15
Sow outdoors: Mar 22 to Apr 12Plant for fall: Aug 22 to Sep 12
Sow outdoors: Mar 29 to May 10Plant for fall: Sep 5 to Sep 26
Start indoors: Apr 5 to Apr 12Transplant outside: May 17 to May 24Sow outdoors: May 10 to May 24Plant for fall: Aug 1 to Aug 15
Start indoors: Apr 5 to Apr 12Sow outdoors: May 10 to May 24Plant for fall: Aug 8 to Aug 22
Start indoors: Apr 5 to Apr 12Sow outdoors: May 10 to May 24
Start indoors: Apr 5 to Apr 12Transplant outside: May 17 to May 31
Sow outdoors: Apr 12 to May 10Plant for fall: Jul 25 to Aug 8
Sow outdoors: Apr 12 to May 10Plant for fall: Aug 8 to Aug 22
Sow outdoors: Apr 12 to May 3
Sow outdoors: Apr 19 to May 17Plant for fall: Aug 8 to Aug 22
Sow outdoors: Apr 19 to May 10Plant for fall: Aug 22 to Sep 12
Sow outdoors: May 10 to May 31Plant for fall: Aug 1 to Aug 15
Sow outdoors: May 10 to May 24
Transplant outside: May 17 to Jun 7
Plant for fall: Oct 3 to Nov 7
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Lukachukai, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 8 – Feb 22 | Apr 5 – Apr 19 | — | — |
| Peppers | Feb 22 – Mar 8 | May 17 – May 31 | — | — |
| Eggplant | Feb 22 – Mar 8 | May 17 – May 31 | — | — |
| Tomatoes | Mar 8 – Mar 22 | May 10 – May 24 | — | — |
| Lettuce | Mar 8 – Mar 22 | Apr 12 – Apr 26 | Apr 5 – May 10 | Aug 22 – Sep 19 |
| Kale | Mar 8 – Mar 22 | Apr 5 – Apr 19 | Apr 5 – Apr 19 | Aug 8 – Aug 29 |
| Broccoli | Mar 8 – Mar 22 | Apr 19 – May 3 | — | Jul 11 – Aug 1 |
| Cabbage | Mar 8 – Mar 22 | Apr 12 – Apr 26 | — | Jul 11 – Aug 1 |
| Cauliflower | Mar 8 – Mar 22 | Apr 19 – May 3 | — | Jul 11 – Aug 1 |
| Okra | Mar 22 – Apr 5 | May 24 – Jun 7 | May 24 – Jun 7 | — |
| Basil | Mar 22 – Apr 5 | May 10 – May 24 | — | — |
| Peas | — | — | Mar 22 – Apr 12 | Jul 25 – Aug 15 |
| Spinach | — | — | Mar 22 – Apr 12 | Aug 22 – Sep 12 |
| Radishes | — | — | Mar 29 – May 10 | Sep 5 – Sep 26 |
| Cucumbers | Apr 5 – Apr 12 | May 17 – May 24 | May 10 – May 24 | Aug 1 – Aug 15 |
| Zucchini & Summer Squash | Apr 5 – Apr 12 | — | May 10 – May 24 | Aug 8 – Aug 22 |
| Winter Squash & Pumpkins | Apr 5 – Apr 12 | — | May 10 – May 24 | — |
| Melons & Watermelon | Apr 5 – Apr 12 | May 17 – May 31 | — | — |
| Carrots | — | — | Apr 12 – May 10 | Jul 25 – Aug 8 |
| Beets | — | — | Apr 12 – May 10 | Aug 8 – Aug 22 |
| Potatoes | — | — | Apr 12 – May 3 | — |
| Swiss Chard | — | — | Apr 19 – May 17 | Aug 8 – Aug 22 |
| Cilantro | — | — | Apr 19 – May 10 | Aug 22 – Sep 12 |
| Green Beans | — | — | May 10 – May 31 | Aug 1 – Aug 15 |
| Sweet Corn | — | — | May 10 – May 24 | — |
| Sweet Potatoes | — | May 17 – Jun 7 | — | — |
| Garlic | — | — | — | Oct 3 – Nov 7 |
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 Lukachukai, AZ weather station, 2 km away (elevation 6,519 ft (1,987 m)).
Frost dates near Lukachukai
- Tsaile May 3 · Oct 17
- Round Rock May 3 · Oct 17
- Many Farms May 6 · Oct 8
- Teec Nos Pos Apr 11 · Nov 1
- Chinle May 6 · Oct 8
- Rock Point May 3 · Oct 17
- Nazlini May 15 · Oct 10
- Dennehotso Apr 10 · Nov 1
- Blue Gap May 6 · Oct 8
- Fort Defiance May 29 · Sep 28
Frequently asked questions
When is the last frost in Lukachukai, AZ?
The median last spring frost in Lukachukai, AZ is May 3. There is still about a 10% chance of frost after May 22, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Lukachukai, AZ?
The median first fall frost is October 17, with about a 10% chance of frost before October 2.
How long is the growing season in Lukachukai, AZ?
About 167 days between the median last spring frost and first fall frost.
What planting zone is Lukachukai, AZ?
Lukachukai, AZ is in USDA hardiness zone 7a.