Alpine, AZ frost dates
Last spring frostJun 15median date
First fall frostSep 21median date
Growing season98 daysfrost-free
Hardiness zone6bZone 6b
How Alpine compares
- In 8 years out of 10, the last spring frost in Alpine falls between June 2 and June 30, a 28-day window. The first fall frost falls between September 7 and October 1.
- The median last frost is 60 days later than the Arizona median of Apr 16.
- Its 98-day growing season is among the shortest of the 193 Arizona places with a regular frost season.
- The last frost is 54 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 218 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | June 2 |
| 50% (median) | June 15 |
| 10% (safe for tender plants) | June 30 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 7 |
| 50% (median) | September 21 |
| 90% (late) | October 1 |
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 Alpine, AZ
Alpine, AZ frost dates — last frost Jun 15, first frost Sep 21, zone 6b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 23 to Apr 6Transplant outside: May 18 to Jun 1
Start indoors: Apr 6 to Apr 20Transplant outside: Jun 29 to Jul 13
Start indoors: Apr 6 to Apr 20Transplant outside: Jun 29 to Jul 13
Start indoors: Apr 20 to May 4Transplant outside: Jun 22 to Jul 6
Start indoors: Apr 20 to May 4Transplant outside: May 25 to Jun 8Sow outdoors: May 18 to Jun 22Plant for fall: Jul 27 to Aug 24
Start indoors: Apr 20 to May 4Transplant outside: May 18 to Jun 1Sow outdoors: May 18 to Jun 1Plant for fall: Jul 13 to Aug 3
Start indoors: Apr 20 to May 4Transplant outside: Jun 1 to Jun 15
Start indoors: Apr 20 to May 4Transplant outside: May 25 to Jun 8
Start indoors: Apr 20 to May 4Transplant outside: Jun 1 to Jun 15
Start indoors: May 4 to May 18Transplant outside: Jul 6 to Jul 20Sow outdoors: Jul 6 to Jul 20
Start indoors: May 4 to May 18Transplant outside: Jun 22 to Jul 6
Sow outdoors: May 4 to May 25
Sow outdoors: May 4 to May 25Plant for fall: Jul 27 to Aug 17
Sow outdoors: May 11 to Jun 22Plant for fall: Aug 10 to Aug 31
Start indoors: May 18 to May 25Transplant outside: Jun 29 to Jul 6Sow outdoors: Jun 22 to Jul 6
Start indoors: May 18 to May 25Sow outdoors: Jun 22 to Jul 6
Start indoors: May 18 to May 25Sow outdoors: Jun 22 to Jul 6
Start indoors: May 18 to May 25Transplant outside: Jun 29 to Jul 13
Sow outdoors: May 25 to Jun 22
Sow outdoors: May 25 to Jun 22Plant for fall: Jul 13 to Jul 27
Sow outdoors: May 25 to Jun 15
Sow outdoors: Jun 1 to Jun 29
Sow outdoors: Jun 1 to Jun 22Plant for fall: Jul 27 to Aug 17
Sow outdoors: Jun 22 to Jul 13
Sow outdoors: Jun 22 to Jul 6
Transplant outside: Jun 29 to Jul 20
Plant for fall: Sep 7 to Oct 12
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Alpine, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 23 – Apr 6 | May 18 – Jun 1 | — | — |
| Peppers | Apr 6 – Apr 20 | Jun 29 – Jul 13 | — | — |
| Eggplant | Apr 6 – Apr 20 | Jun 29 – Jul 13 | — | — |
| Tomatoes | Apr 20 – May 4 | Jun 22 – Jul 6 | — | — |
| Lettuce | Apr 20 – May 4 | May 25 – Jun 8 | May 18 – Jun 22 | Jul 27 – Aug 24 |
| Kale | Apr 20 – May 4 | May 18 – Jun 1 | May 18 – Jun 1 | Jul 13 – Aug 3 |
| Broccoli | Apr 20 – May 4 | Jun 1 – Jun 15 | — | — |
| Cabbage | Apr 20 – May 4 | May 25 – Jun 8 | — | — |
| Cauliflower | Apr 20 – May 4 | Jun 1 – Jun 15 | — | — |
| Okra | May 4 – May 18 | Jul 6 – Jul 20 | Jul 6 – Jul 20 | — |
| Basil | May 4 – May 18 | Jun 22 – Jul 6 | — | — |
| Peas | — | — | May 4 – May 25 | — |
| Spinach | — | — | May 4 – May 25 | Jul 27 – Aug 17 |
| Radishes | — | — | May 11 – Jun 22 | Aug 10 – Aug 31 |
| Cucumbers | May 18 – May 25 | Jun 29 – Jul 6 | Jun 22 – Jul 6 | — |
| Zucchini & Summer Squash | May 18 – May 25 | — | Jun 22 – Jul 6 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 98 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 18 – May 25 | — | Jun 22 – Jul 6 | — |
| Melons & Watermelon Warning: Your frost-free season is about 98 days, which is tight for melons & watermelon (85+ days). Choose early varieties and use transplants or row covers. | May 18 – May 25 | Jun 29 – Jul 13 | — | — |
| Carrots | — | — | May 25 – Jun 22 | — |
| Beets | — | — | May 25 – Jun 22 | Jul 13 – Jul 27 |
| Potatoes | — | — | May 25 – Jun 15 | — |
| Swiss Chard | — | — | Jun 1 – Jun 29 | — |
| Cilantro | — | — | Jun 1 – Jun 22 | Jul 27 – Aug 17 |
| Green Beans | — | — | Jun 22 – Jul 13 | — |
| Sweet Corn | — | — | Jun 22 – Jul 6 | — |
| Sweet Potatoes Warning: Your frost-free season is about 98 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 29 – Jul 20 | — | — |
| Garlic | — | — | — | Sep 7 – Oct 12 |
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 Alpine, AZ weather station, 3 km away (elevation 8,051 ft (2,454 m)).
Frost dates near Alpine
- Nutrioso Jun 15 · Sep 21
- Blue Jun 17 · Sep 21
- Eagar Jun 1 · Sep 26
- Greer Jun 5 · Sep 29
- Springerville Jun 1 · Sep 26
- Vernon May 20 · Oct 11
- Mcnary May 20 · Oct 11
- Clifton Feb 26 · Nov 23
- Saint Johns May 3 · Oct 10
- Fort Apache May 22 · Oct 6
Frequently asked questions
When is the last frost in Alpine, AZ?
The median last spring frost in Alpine, AZ is June 15. There is still about a 10% chance of frost after June 30, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Alpine, AZ?
The median first fall frost is September 21, with about a 10% chance of frost before September 7.
How long is the growing season in Alpine, AZ?
About 98 days between the median last spring frost and first fall frost.
What planting zone is Alpine, AZ?
Alpine, AZ is in USDA hardiness zone 6b.