Snowflake, AZ frost dates
Last spring frostMay 11median date
First fall frostOct 10median date
Growing season152 daysfrost-free
Hardiness zone7aZone 7a
How Snowflake compares
- In 8 years out of 10, the last spring frost in Snowflake falls between April 27 and May 31, a 34-day window. The first fall frost falls between September 28 and October 22.
- The median last frost is 25 days later than the Arizona median of Apr 16.
- Its 152-day growing season is longer than 25% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 25 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 149 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 27 |
| 50% (median) | May 11 |
| 10% (safe for tender plants) | May 31 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 28 |
| 50% (median) | October 10 |
| 90% (late) | October 22 |
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 Snowflake, AZ
Snowflake, AZ frost dates — last frost May 11, first frost Oct 10, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Feb 16 to Mar 2Transplant outside: Apr 13 to Apr 27
Start indoors: Mar 2 to Mar 16Transplant outside: May 25 to Jun 8
Start indoors: Mar 2 to Mar 16Transplant outside: May 25 to Jun 8
Start indoors: Mar 16 to Mar 30Transplant outside: May 18 to Jun 1
Start indoors: Mar 16 to Mar 30Transplant outside: Apr 20 to May 4Sow outdoors: Apr 13 to May 18Plant for fall: Aug 15 to Sep 12
Start indoors: Mar 16 to Mar 30Transplant outside: Apr 13 to Apr 27Sow outdoors: Apr 13 to Apr 27Plant for fall: Aug 1 to Aug 22
Start indoors: Mar 16 to Mar 30Transplant outside: Apr 27 to May 11Plant for fall: Jul 4 to Jul 25
Start indoors: Mar 16 to Mar 30Transplant outside: Apr 20 to May 4Plant for fall: Jul 4 to Jul 25
Start indoors: Mar 16 to Mar 30Transplant outside: Apr 27 to May 11Plant for fall: Jul 4 to Jul 25
Start indoors: Mar 30 to Apr 13Transplant outside: Jun 1 to Jun 15Sow outdoors: Jun 1 to Jun 15
Start indoors: Mar 30 to Apr 13Transplant outside: May 18 to Jun 1
Sow outdoors: Mar 30 to Apr 20Plant for fall: Jul 18 to Aug 8
Sow outdoors: Mar 30 to Apr 20Plant for fall: Aug 15 to Sep 5
Sow outdoors: Apr 6 to May 18Plant for fall: Aug 29 to Sep 19
Start indoors: Apr 13 to Apr 20Transplant outside: May 25 to Jun 1Sow outdoors: May 18 to Jun 1Plant for fall: Jul 25 to Aug 8
Start indoors: Apr 13 to Apr 20Sow outdoors: May 18 to Jun 1Plant for fall: Aug 1 to Aug 15
Start indoors: Apr 13 to Apr 20Sow outdoors: May 18 to Jun 1
Start indoors: Apr 13 to Apr 20Transplant outside: May 25 to Jun 8
Sow outdoors: Apr 20 to May 18Plant for fall: Jul 18 to Aug 1
Sow outdoors: Apr 20 to May 18Plant for fall: Aug 1 to Aug 15
Sow outdoors: Apr 20 to May 11
Sow outdoors: Apr 27 to May 25Plant for fall: Aug 1 to Aug 15
Sow outdoors: Apr 27 to May 18Plant for fall: Aug 15 to Sep 5
Sow outdoors: May 18 to Jun 8Plant for fall: Jul 25 to Aug 8
Sow outdoors: May 18 to Jun 1
Transplant outside: May 25 to Jun 15
Plant for fall: Sep 26 to Oct 31
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Snowflake, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 16 – Mar 2 | Apr 13 – Apr 27 | — | — |
| Peppers | Mar 2 – Mar 16 | May 25 – Jun 8 | — | — |
| Eggplant | Mar 2 – Mar 16 | May 25 – Jun 8 | — | — |
| Tomatoes | Mar 16 – Mar 30 | May 18 – Jun 1 | — | — |
| Lettuce | Mar 16 – Mar 30 | Apr 20 – May 4 | Apr 13 – May 18 | Aug 15 – Sep 12 |
| Kale | Mar 16 – Mar 30 | Apr 13 – Apr 27 | Apr 13 – Apr 27 | Aug 1 – Aug 22 |
| Broccoli | Mar 16 – Mar 30 | Apr 27 – May 11 | — | Jul 4 – Jul 25 |
| Cabbage | Mar 16 – Mar 30 | Apr 20 – May 4 | — | Jul 4 – Jul 25 |
| Cauliflower | Mar 16 – Mar 30 | Apr 27 – May 11 | — | Jul 4 – Jul 25 |
| Okra | Mar 30 – Apr 13 | Jun 1 – Jun 15 | Jun 1 – Jun 15 | — |
| Basil | Mar 30 – Apr 13 | May 18 – Jun 1 | — | — |
| Peas | — | — | Mar 30 – Apr 20 | Jul 18 – Aug 8 |
| Spinach | — | — | Mar 30 – Apr 20 | Aug 15 – Sep 5 |
| Radishes | — | — | Apr 6 – May 18 | Aug 29 – Sep 19 |
| Cucumbers | Apr 13 – Apr 20 | May 25 – Jun 1 | May 18 – Jun 1 | Jul 25 – Aug 8 |
| Zucchini & Summer Squash | Apr 13 – Apr 20 | — | May 18 – Jun 1 | Aug 1 – Aug 15 |
| Winter Squash & Pumpkins | Apr 13 – Apr 20 | — | May 18 – Jun 1 | — |
| Melons & Watermelon | Apr 13 – Apr 20 | May 25 – Jun 8 | — | — |
| Carrots | — | — | Apr 20 – May 18 | Jul 18 – Aug 1 |
| Beets | — | — | Apr 20 – May 18 | Aug 1 – Aug 15 |
| Potatoes | — | — | Apr 20 – May 11 | — |
| Swiss Chard | — | — | Apr 27 – May 25 | Aug 1 – Aug 15 |
| Cilantro | — | — | Apr 27 – May 18 | Aug 15 – Sep 5 |
| Green Beans | — | — | May 18 – Jun 8 | Jul 25 – Aug 8 |
| Sweet Corn | — | — | May 18 – Jun 1 | — |
| Sweet Potatoes | — | May 25 – Jun 15 | — | — |
| 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 Snowflake, AZ weather station, about 1 km away (elevation 5,643 ft (1,720 m)).
Frost dates near Snowflake
- Taylor May 11 · Oct 10
- Show Low May 5 · Oct 15
- Clay Springs May 23 · Oct 5
- Pinedale May 5 · Oct 15
- White Mountain Lake May 5 · Oct 15
- Woodruff May 4 · Oct 16
- Lakeside May 22 · Oct 6
- Concho May 2 · Oct 14
- Vernon May 20 · Oct 11
- Pinetop May 22 · Oct 6
Frequently asked questions
When is the last frost in Snowflake, AZ?
The median last spring frost in Snowflake, AZ is May 11. 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 Snowflake, AZ?
The median first fall frost is October 10, with about a 10% chance of frost before September 28.
How long is the growing season in Snowflake, AZ?
About 152 days between the median last spring frost and first fall frost.
What planting zone is Snowflake, AZ?
Snowflake, AZ is in USDA hardiness zone 7a.