Polacca, AZ frost dates
Last spring frostMay 16median date
First fall frostOct 10median date
Growing season147 daysfrost-free
Hardiness zone7aZone 7a
How Polacca compares
- In 8 years out of 10, the last spring frost in Polacca falls between April 29 and June 5, a 37-day window. The first fall frost falls between September 29 and October 24.
- The median last frost is 30 days later than the Arizona median of Apr 16.
- Its 147-day growing season is longer than 21% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 30 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 172 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 29 |
| 50% (median) | May 16 |
| 10% (safe for tender plants) | June 5 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 29 |
| 50% (median) | October 10 |
| 90% (late) | October 24 |
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 Polacca, AZ
Polacca, AZ frost dates — last frost May 16, first frost Oct 10, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Feb 21 to Mar 7Transplant outside: Apr 18 to May 2
Start indoors: Mar 7 to Mar 21Transplant outside: May 30 to Jun 13
Start indoors: Mar 7 to Mar 21Transplant outside: May 30 to Jun 13
Start indoors: Mar 21 to Apr 4Transplant outside: May 23 to Jun 6
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 25 to May 9Sow outdoors: Apr 18 to May 23Plant for fall: Aug 15 to Sep 12
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 18 to May 2Sow outdoors: Apr 18 to May 2Plant for fall: Aug 1 to Aug 22
Start indoors: Mar 21 to Apr 4Transplant outside: May 2 to May 16Plant for fall: Jul 4 to Jul 25
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 25 to May 9Plant for fall: Jul 4 to Jul 25
Start indoors: Mar 21 to Apr 4Transplant outside: May 2 to May 16Plant for fall: Jul 4 to Jul 25
Start indoors: Apr 4 to Apr 18Transplant outside: Jun 6 to Jun 20Sow outdoors: Jun 6 to Jun 20
Start indoors: Apr 4 to Apr 18Transplant outside: May 23 to Jun 6
Sow outdoors: Apr 4 to Apr 25Plant for fall: Jul 18 to Aug 8
Sow outdoors: Apr 4 to Apr 25Plant for fall: Aug 15 to Sep 5
Sow outdoors: Apr 11 to May 23Plant for fall: Aug 29 to Sep 19
Start indoors: Apr 18 to Apr 25Transplant outside: May 30 to Jun 6Sow outdoors: May 23 to Jun 6Plant for fall: Jul 25 to Aug 8
Start indoors: Apr 18 to Apr 25Sow outdoors: May 23 to Jun 6Plant for fall: Aug 1 to Aug 15
Start indoors: Apr 18 to Apr 25Sow outdoors: May 23 to Jun 6
Start indoors: Apr 18 to Apr 25Transplant outside: May 30 to Jun 13
Sow outdoors: Apr 25 to May 23Plant for fall: Jul 18 to Aug 1
Sow outdoors: Apr 25 to May 23Plant for fall: Aug 1 to Aug 15
Sow outdoors: Apr 25 to May 16
Sow outdoors: May 2 to May 30Plant for fall: Aug 1 to Aug 15
Sow outdoors: May 2 to May 23Plant for fall: Aug 15 to Sep 5
Sow outdoors: May 23 to Jun 13Plant for fall: Jul 25 to Aug 8
Sow outdoors: May 23 to Jun 6
Transplant outside: May 30 to Jun 20
Plant for fall: Sep 26 to Oct 31
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Polacca, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 21 – Mar 7 | Apr 18 – May 2 | — | — |
| Peppers | Mar 7 – Mar 21 | May 30 – Jun 13 | — | — |
| Eggplant | Mar 7 – Mar 21 | May 30 – Jun 13 | — | — |
| Tomatoes | Mar 21 – Apr 4 | May 23 – Jun 6 | — | — |
| Lettuce | Mar 21 – Apr 4 | Apr 25 – May 9 | Apr 18 – May 23 | Aug 15 – Sep 12 |
| Kale | Mar 21 – Apr 4 | Apr 18 – May 2 | Apr 18 – May 2 | Aug 1 – Aug 22 |
| Broccoli | Mar 21 – Apr 4 | May 2 – May 16 | — | Jul 4 – Jul 25 |
| Cabbage | Mar 21 – Apr 4 | Apr 25 – May 9 | — | Jul 4 – Jul 25 |
| Cauliflower | Mar 21 – Apr 4 | May 2 – May 16 | — | Jul 4 – Jul 25 |
| Okra | Apr 4 – Apr 18 | Jun 6 – Jun 20 | Jun 6 – Jun 20 | — |
| Basil | Apr 4 – Apr 18 | May 23 – Jun 6 | — | — |
| Peas | — | — | Apr 4 – Apr 25 | Jul 18 – Aug 8 |
| Spinach | — | — | Apr 4 – Apr 25 | Aug 15 – Sep 5 |
| Radishes | — | — | Apr 11 – May 23 | Aug 29 – Sep 19 |
| Cucumbers | Apr 18 – Apr 25 | May 30 – Jun 6 | May 23 – Jun 6 | Jul 25 – Aug 8 |
| Zucchini & Summer Squash | Apr 18 – Apr 25 | — | May 23 – Jun 6 | Aug 1 – Aug 15 |
| Winter Squash & Pumpkins | Apr 18 – Apr 25 | — | May 23 – Jun 6 | — |
| Melons & Watermelon | Apr 18 – Apr 25 | May 30 – Jun 13 | — | — |
| Carrots | — | — | Apr 25 – May 23 | Jul 18 – Aug 1 |
| Beets | — | — | Apr 25 – May 23 | Aug 1 – Aug 15 |
| Potatoes | — | — | Apr 25 – May 16 | — |
| Swiss Chard | — | — | May 2 – May 30 | Aug 1 – Aug 15 |
| Cilantro | — | — | May 2 – May 23 | Aug 15 – Sep 5 |
| Green Beans | — | — | May 23 – Jun 13 | Jul 25 – Aug 8 |
| Sweet Corn | — | — | May 23 – Jun 6 | — |
| Sweet Potatoes | — | May 30 – Jun 20 | — | — |
| Garlic | — | — | — | Sep 26 – Oct 31 |
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 Keams Canyon, AZ weather station, 18 km away (elevation 6,204 ft (1,891 m)).
Frost dates near Polacca
- Keams Canyon May 16 · Oct 10
- Second Mesa May 16 · Oct 10
- Kykotsmovi Village May 16 · Oct 10
- Hotevilla May 16 · Oct 10
- Pinon May 16 · Oct 10
- Blue Gap May 6 · Oct 8
- Indian Wells May 16 · Oct 10
- Chinle May 6 · Oct 8
- Ganado May 15 · Oct 10
- Leupp Apr 14 · Oct 25
Frequently asked questions
When is the last frost in Polacca, AZ?
The median last spring frost in Polacca, AZ is May 16. There is still about a 10% chance of frost after June 5, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Polacca, AZ?
The median first fall frost is October 10, with about a 10% chance of frost before September 29.
How long is the growing season in Polacca, AZ?
About 147 days between the median last spring frost and first fall frost.
What planting zone is Polacca, AZ?
Polacca, AZ is in USDA hardiness zone 7a.