Healy, AK frost dates
Last spring frostMay 27median date
First fall frostSep 1median date
Growing season97 daysfrost-free
Hardiness zone2aZone 2a
How Healy compares
- In 8 years out of 10, the last spring frost in Healy falls between May 11 and June 10, a 30-day window. The first fall frost falls between August 18 and September 19.
- The median last frost is 6 days later than the Alaska median of May 21.
- Its 97-day growing season is longer than 16% of the 165 Alaska places with a regular frost season (state median 124 days).
- The last frost is typical for zone 2a, where the median is May 24.
- The weather station records an average of 219 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 11 |
| 50% (median) | May 27 |
| 10% (safe for tender plants) | June 10 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 18 |
| 50% (median) | September 1 |
| 90% (late) | September 19 |
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 Healy, AK
Healy, AK frost dates — last frost May 27, first frost Sep 1, zone 2a. whenisthelastfrost.com
Crop
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Start indoors: Mar 4 to Mar 18Transplant outside: Apr 29 to May 13
Start indoors: Mar 18 to Apr 1Transplant outside: Jun 10 to Jun 24
Start indoors: Mar 18 to Apr 1Transplant outside: Jun 10 to Jun 24
Start indoors: Apr 1 to Apr 15Transplant outside: Jun 3 to Jun 17
Start indoors: Apr 1 to Apr 15Transplant outside: May 6 to May 20Sow outdoors: Apr 29 to Jun 3Plant for fall: Jul 7 to Aug 4
Start indoors: Apr 1 to Apr 15Transplant outside: Apr 29 to May 13Sow outdoors: Apr 29 to May 13Plant for fall: Jun 23 to Jul 14
Start indoors: Apr 1 to Apr 15Transplant outside: May 13 to May 27
Start indoors: Apr 1 to Apr 15Transplant outside: May 6 to May 20
Start indoors: Apr 1 to Apr 15Transplant outside: May 13 to May 27
Start indoors: Apr 15 to Apr 29Transplant outside: Jun 17 to Jul 1Sow outdoors: Jun 17 to Jul 1
Start indoors: Apr 15 to Apr 29Transplant outside: Jun 3 to Jun 17
Sow outdoors: Apr 15 to May 6
Sow outdoors: Apr 15 to May 6Plant for fall: Jul 7 to Jul 28
Sow outdoors: Apr 22 to Jun 3Plant for fall: Jul 21 to Aug 11
Start indoors: Apr 29 to May 6Transplant outside: Jun 10 to Jun 17Sow outdoors: Jun 3 to Jun 17
Start indoors: Apr 29 to May 6Sow outdoors: Jun 3 to Jun 17
Start indoors: Apr 29 to May 6Sow outdoors: Jun 3 to Jun 17
Start indoors: Apr 29 to May 6Transplant outside: Jun 10 to Jun 24
Sow outdoors: May 6 to Jun 3
Sow outdoors: May 6 to Jun 3Plant for fall: Jun 23 to Jul 7
Sow outdoors: May 6 to May 27
Sow outdoors: May 13 to Jun 10
Sow outdoors: May 13 to Jun 3Plant for fall: Jul 7 to Jul 28
Sow outdoors: Jun 3 to Jun 24
Sow outdoors: Jun 3 to Jun 17
Transplant outside: Jun 10 to Jul 1
Plant for fall: Aug 18 to Sep 22
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Healy, AK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 4 – Mar 18 | Apr 29 – May 13 | — | — |
| Peppers | Mar 18 – Apr 1 | Jun 10 – Jun 24 | — | — |
| Eggplant | Mar 18 – Apr 1 | Jun 10 – Jun 24 | — | — |
| Tomatoes | Apr 1 – Apr 15 | Jun 3 – Jun 17 | — | — |
| Lettuce | Apr 1 – Apr 15 | May 6 – May 20 | Apr 29 – Jun 3 | Jul 7 – Aug 4 |
| Kale | Apr 1 – Apr 15 | Apr 29 – May 13 | Apr 29 – May 13 | Jun 23 – Jul 14 |
| Broccoli | Apr 1 – Apr 15 | May 13 – May 27 | — | — |
| Cabbage | Apr 1 – Apr 15 | May 6 – May 20 | — | — |
| Cauliflower | Apr 1 – Apr 15 | May 13 – May 27 | — | — |
| Okra | Apr 15 – Apr 29 | Jun 17 – Jul 1 | Jun 17 – Jul 1 | — |
| Basil | Apr 15 – Apr 29 | Jun 3 – Jun 17 | — | — |
| Peas | — | — | Apr 15 – May 6 | — |
| Spinach | — | — | Apr 15 – May 6 | Jul 7 – Jul 28 |
| Radishes | — | — | Apr 22 – Jun 3 | Jul 21 – Aug 11 |
| Cucumbers | Apr 29 – May 6 | Jun 10 – Jun 17 | Jun 3 – Jun 17 | — |
| Zucchini & Summer Squash | Apr 29 – May 6 | — | Jun 3 – Jun 17 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 97 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | Apr 29 – May 6 | — | Jun 3 – Jun 17 | — |
| Melons & Watermelon Warning: Your frost-free season is about 97 days, which is tight for melons & watermelon (85+ days). Choose early varieties and use transplants or row covers. | Apr 29 – May 6 | Jun 10 – Jun 24 | — | — |
| Carrots | — | — | May 6 – Jun 3 | — |
| Beets | — | — | May 6 – Jun 3 | Jun 23 – Jul 7 |
| Potatoes | — | — | May 6 – May 27 | — |
| Swiss Chard | — | — | May 13 – Jun 10 | — |
| Cilantro | — | — | May 13 – Jun 3 | Jul 7 – Jul 28 |
| Green Beans | — | — | Jun 3 – Jun 24 | — |
| Sweet Corn | — | — | Jun 3 – Jun 17 | — |
| Sweet Potatoes Warning: Your frost-free season is about 97 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 10 – Jul 1 | — | — |
| Garlic | — | — | — | Aug 18 – Sep 22 |
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 Healy, AK weather station, 6 km away (elevation 1,417 ft (432 m)).
Frost dates near Healy
- Clear May 24 · Sep 4
- Anderson May 24 · Sep 4
- Cantwell frost any month
- Denali National Park May 25 · Sep 8
- Nenana May 15 · Sep 11
- Ester May 24 · Sep 1
- Salcha May 20 · Sep 1
- Fort Wainwright May 16 · Sep 6
- Fairbanks May 16 · Sep 6
- North Pole May 22 · Sep 2
Frequently asked questions
When is the last frost in Healy, AK?
The median last spring frost in Healy, AK is May 27. 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 Healy, AK?
The median first fall frost is September 1, with about a 10% chance of frost before August 18.
How long is the growing season in Healy, AK?
About 97 days between the median last spring frost and first fall frost.
What planting zone is Healy, AK?
Healy, AK is in USDA hardiness zone 2a.