Chinle, AZ frost dates
Last spring frostMay 6median date
First fall frostOct 8median date
Growing season155 daysfrost-free
Hardiness zone7aZone 7a
How Chinle compares
- In 8 years out of 10, the last spring frost in Chinle falls between April 22 and May 31, a 39-day window. The first fall frost falls between September 26 and October 23.
- The median last frost is 20 days later than the Arizona median of Apr 16.
- Its 155-day growing season is longer than 26% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 20 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 139 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 22 |
| 50% (median) | May 6 |
| 10% (safe for tender plants) | May 31 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 26 |
| 50% (median) | October 8 |
| 90% (late) | October 23 |
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 Chinle, AZ
Chinle, AZ frost dates — last frost May 6, first frost Oct 8, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Feb 11 to Feb 25Transplant outside: Apr 8 to Apr 22
Start indoors: Feb 25 to Mar 11Transplant outside: May 20 to Jun 3
Start indoors: Feb 25 to Mar 11Transplant outside: May 20 to Jun 3
Start indoors: Mar 11 to Mar 25Transplant outside: May 13 to May 27
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 15 to Apr 29Sow outdoors: Apr 8 to May 13Plant for fall: Aug 13 to Sep 10
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 8 to Apr 22Sow outdoors: Apr 8 to Apr 22Plant for fall: Jul 30 to Aug 20
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 22 to May 6Plant for fall: Jul 2 to Jul 23
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 15 to Apr 29Plant for fall: Jul 2 to Jul 23
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 22 to May 6Plant for fall: Jul 2 to Jul 23
Start indoors: Mar 25 to Apr 8Transplant outside: May 27 to Jun 10Sow outdoors: May 27 to Jun 10
Start indoors: Mar 25 to Apr 8Transplant outside: May 13 to May 27
Sow outdoors: Mar 25 to Apr 15Plant for fall: Jul 16 to Aug 6
Sow outdoors: Mar 25 to Apr 15Plant for fall: Aug 13 to Sep 3
Sow outdoors: Apr 1 to May 13Plant for fall: Aug 27 to Sep 17
Start indoors: Apr 8 to Apr 15Transplant outside: May 20 to May 27Sow outdoors: May 13 to May 27Plant for fall: Jul 23 to Aug 6
Start indoors: Apr 8 to Apr 15Sow outdoors: May 13 to May 27Plant for fall: Jul 30 to Aug 13
Start indoors: Apr 8 to Apr 15Sow outdoors: May 13 to May 27
Start indoors: Apr 8 to Apr 15Transplant outside: May 20 to Jun 3
Sow outdoors: Apr 15 to May 13Plant for fall: Jul 16 to Jul 30
Sow outdoors: Apr 15 to May 13Plant for fall: Jul 30 to Aug 13
Sow outdoors: Apr 15 to May 6
Sow outdoors: Apr 22 to May 20Plant for fall: Jul 30 to Aug 13
Sow outdoors: Apr 22 to May 13Plant for fall: Aug 13 to Sep 3
Sow outdoors: May 13 to Jun 3Plant for fall: Jul 23 to Aug 6
Sow outdoors: May 13 to May 27
Transplant outside: May 20 to Jun 10
Plant for fall: Sep 24 to Oct 29
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Chinle, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 11 – Feb 25 | Apr 8 – Apr 22 | — | — |
| Peppers | Feb 25 – Mar 11 | May 20 – Jun 3 | — | — |
| Eggplant | Feb 25 – Mar 11 | May 20 – Jun 3 | — | — |
| Tomatoes | Mar 11 – Mar 25 | May 13 – May 27 | — | — |
| Lettuce | Mar 11 – Mar 25 | Apr 15 – Apr 29 | Apr 8 – May 13 | Aug 13 – Sep 10 |
| Kale | Mar 11 – Mar 25 | Apr 8 – Apr 22 | Apr 8 – Apr 22 | Jul 30 – Aug 20 |
| Broccoli | Mar 11 – Mar 25 | Apr 22 – May 6 | — | Jul 2 – Jul 23 |
| Cabbage | Mar 11 – Mar 25 | Apr 15 – Apr 29 | — | Jul 2 – Jul 23 |
| Cauliflower | Mar 11 – Mar 25 | Apr 22 – May 6 | — | Jul 2 – Jul 23 |
| Okra | Mar 25 – Apr 8 | May 27 – Jun 10 | May 27 – Jun 10 | — |
| Basil | Mar 25 – Apr 8 | May 13 – May 27 | — | — |
| Peas | — | — | Mar 25 – Apr 15 | Jul 16 – Aug 6 |
| Spinach | — | — | Mar 25 – Apr 15 | Aug 13 – Sep 3 |
| Radishes | — | — | Apr 1 – May 13 | Aug 27 – Sep 17 |
| Cucumbers | Apr 8 – Apr 15 | May 20 – May 27 | May 13 – May 27 | Jul 23 – Aug 6 |
| Zucchini & Summer Squash | Apr 8 – Apr 15 | — | May 13 – May 27 | Jul 30 – Aug 13 |
| Winter Squash & Pumpkins | Apr 8 – Apr 15 | — | May 13 – May 27 | — |
| Melons & Watermelon | Apr 8 – Apr 15 | May 20 – Jun 3 | — | — |
| Carrots | — | — | Apr 15 – May 13 | Jul 16 – Jul 30 |
| Beets | — | — | Apr 15 – May 13 | Jul 30 – Aug 13 |
| Potatoes | — | — | Apr 15 – May 6 | — |
| Swiss Chard | — | — | Apr 22 – May 20 | Jul 30 – Aug 13 |
| Cilantro | — | — | Apr 22 – May 13 | Aug 13 – Sep 3 |
| Green Beans | — | — | May 13 – Jun 3 | Jul 23 – Aug 6 |
| Sweet Corn | — | — | May 13 – May 27 | — |
| Sweet Potatoes | — | May 20 – Jun 10 | — | — |
| Garlic | — | — | — | Sep 24 – Oct 29 |
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 Canyon De Chelly, AZ weather station, 6 km away (elevation 5,610 ft (1,710 m)).
Frost dates near Chinle
- Nazlini May 15 · Oct 10
- Many Farms May 6 · Oct 8
- Blue Gap May 6 · Oct 8
- Tsaile May 3 · Oct 17
- Round Rock May 3 · Oct 17
- Lukachukai May 3 · Oct 17
- Ganado May 15 · Oct 10
- Pinon May 16 · Oct 10
- Fort Defiance May 29 · Sep 28
- Rock Point May 3 · Oct 17
Frequently asked questions
When is the last frost in Chinle, AZ?
The median last spring frost in Chinle, AZ is May 6. There is still about a 10% chance of frost after May 31, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Chinle, AZ?
The median first fall frost is October 8, with about a 10% chance of frost before September 26.
How long is the growing season in Chinle, AZ?
About 155 days between the median last spring frost and first fall frost.
What planting zone is Chinle, AZ?
Chinle, AZ is in USDA hardiness zone 7a.