Lupton, AZ frost dates
Last spring frostMay 22median date
First fall frostOct 8median date
Growing season139 daysfrost-free
Hardiness zone6bZone 6b
How Lupton compares
- In 8 years out of 10, the last spring frost in Lupton falls between May 5 and June 10, a 36-day window. The first fall frost falls between September 25 and October 22.
- The median last frost is 36 days later than the Arizona median of Apr 16.
- Its 139-day growing season is longer than 16% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 30 days later than the zone 6b median of Apr 22. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6b chart.
- The weather station records an average of 159 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 5 |
| 50% (median) | May 22 |
| 10% (safe for tender plants) | June 10 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 25 |
| 50% (median) | October 8 |
| 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 Lupton, AZ
Lupton, AZ frost dates — last frost May 22, first frost Oct 8, zone 6b. whenisthelastfrost.com
Crop
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Start indoors: Feb 27 to Mar 13Transplant outside: Apr 24 to May 8
Start indoors: Mar 13 to Mar 27Transplant outside: Jun 5 to Jun 19
Start indoors: Mar 13 to Mar 27Transplant outside: Jun 5 to Jun 19
Start indoors: Mar 27 to Apr 10Transplant outside: May 29 to Jun 12
Start indoors: Mar 27 to Apr 10Transplant outside: May 1 to May 15Sow outdoors: Apr 24 to May 29Plant for fall: Aug 13 to Sep 10
Start indoors: Mar 27 to Apr 10Transplant outside: Apr 24 to May 8Sow outdoors: Apr 24 to May 8Plant for fall: Jul 30 to Aug 20
Start indoors: Mar 27 to Apr 10Transplant outside: May 8 to May 22Plant for fall: Jul 2 to Jul 23
Start indoors: Mar 27 to Apr 10Transplant outside: May 1 to May 15Plant for fall: Jul 2 to Jul 23
Start indoors: Mar 27 to Apr 10Transplant outside: May 8 to May 22Plant for fall: Jul 2 to Jul 23
Start indoors: Apr 10 to Apr 24Transplant outside: Jun 12 to Jun 26Sow outdoors: Jun 12 to Jun 26
Start indoors: Apr 10 to Apr 24Transplant outside: May 29 to Jun 12
Sow outdoors: Apr 10 to May 1Plant for fall: Jul 16 to Aug 6
Sow outdoors: Apr 10 to May 1Plant for fall: Aug 13 to Sep 3
Sow outdoors: Apr 17 to May 29Plant for fall: Aug 27 to Sep 17
Start indoors: Apr 24 to May 1Transplant outside: Jun 5 to Jun 12Sow outdoors: May 29 to Jun 12Plant for fall: Jul 23 to Aug 6
Start indoors: Apr 24 to May 1Sow outdoors: May 29 to Jun 12Plant for fall: Jul 30 to Aug 13
Start indoors: Apr 24 to May 1Sow outdoors: May 29 to Jun 12
Start indoors: Apr 24 to May 1Transplant outside: Jun 5 to Jun 19
Sow outdoors: May 1 to May 29Plant for fall: Jul 16 to Jul 30
Sow outdoors: May 1 to May 29Plant for fall: Jul 30 to Aug 13
Sow outdoors: May 1 to May 22
Sow outdoors: May 8 to Jun 5Plant for fall: Jul 30 to Aug 13
Sow outdoors: May 8 to May 29Plant for fall: Aug 13 to Sep 3
Sow outdoors: May 29 to Jun 19Plant for fall: Jul 23 to Aug 6
Sow outdoors: May 29 to Jun 12
Transplant outside: Jun 5 to Jun 26
Plant for fall: Sep 24 to Oct 29
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Lupton, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 27 – Mar 13 | Apr 24 – May 8 | — | — |
| Peppers | Mar 13 – Mar 27 | Jun 5 – Jun 19 | — | — |
| Eggplant | Mar 13 – Mar 27 | Jun 5 – Jun 19 | — | — |
| Tomatoes | Mar 27 – Apr 10 | May 29 – Jun 12 | — | — |
| Lettuce | Mar 27 – Apr 10 | May 1 – May 15 | Apr 24 – May 29 | Aug 13 – Sep 10 |
| Kale | Mar 27 – Apr 10 | Apr 24 – May 8 | Apr 24 – May 8 | Jul 30 – Aug 20 |
| Broccoli | Mar 27 – Apr 10 | May 8 – May 22 | — | Jul 2 – Jul 23 |
| Cabbage | Mar 27 – Apr 10 | May 1 – May 15 | — | Jul 2 – Jul 23 |
| Cauliflower | Mar 27 – Apr 10 | May 8 – May 22 | — | Jul 2 – Jul 23 |
| Okra | Apr 10 – Apr 24 | Jun 12 – Jun 26 | Jun 12 – Jun 26 | — |
| Basil | Apr 10 – Apr 24 | May 29 – Jun 12 | — | — |
| Peas | — | — | Apr 10 – May 1 | Jul 16 – Aug 6 |
| Spinach | — | — | Apr 10 – May 1 | Aug 13 – Sep 3 |
| Radishes | — | — | Apr 17 – May 29 | Aug 27 – Sep 17 |
| Cucumbers | Apr 24 – May 1 | Jun 5 – Jun 12 | May 29 – Jun 12 | Jul 23 – Aug 6 |
| Zucchini & Summer Squash | Apr 24 – May 1 | — | May 29 – Jun 12 | Jul 30 – Aug 13 |
| Winter Squash & Pumpkins | Apr 24 – May 1 | — | May 29 – Jun 12 | — |
| Melons & Watermelon | Apr 24 – May 1 | Jun 5 – Jun 19 | — | — |
| Carrots | — | — | May 1 – May 29 | Jul 16 – Jul 30 |
| Beets | — | — | May 1 – May 29 | Jul 30 – Aug 13 |
| Potatoes | — | — | May 1 – May 22 | — |
| Swiss Chard | — | — | May 8 – Jun 5 | Jul 30 – Aug 13 |
| Cilantro | — | — | May 8 – May 29 | Aug 13 – Sep 3 |
| Green Beans | — | — | May 29 – Jun 19 | Jul 23 – Aug 6 |
| Sweet Corn | — | — | May 29 – Jun 12 | — |
| Sweet Potatoes | — | Jun 5 – Jun 26 | — | — |
| 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 Sanders, AZ weather station, 28 km away (elevation 5,853 ft (1,784 m)).
Frost dates near Lupton
- Houck May 22 · Oct 8
- Sanders May 22 · Oct 8
- Saint Michaels May 29 · Sep 28
- Window Rock May 29 · Sep 28
- Fort Defiance May 29 · Sep 28
- Chambers May 22 · Oct 8
- Petrified Forest Natl Pk May 22 · Oct 8
- Red Valley May 22 · Oct 8
- Ganado May 15 · Oct 10
- Nazlini May 15 · Oct 10
Frequently asked questions
When is the last frost in Lupton, AZ?
The median last spring frost in Lupton, AZ is May 22. There is still about a 10% chance of frost after June 10, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Lupton, AZ?
The median first fall frost is October 8, with about a 10% chance of frost before September 25.
How long is the growing season in Lupton, AZ?
About 139 days between the median last spring frost and first fall frost.
What planting zone is Lupton, AZ?
Lupton, AZ is in USDA hardiness zone 6b.