Saint George Island, AK frost dates
Last spring frostMay 31median date
First fall frostOct 5median date
Growing season127 daysfrost-free
Hardiness zone7aZone 7a
How Saint George Island compares
- In 8 years out of 10, the last spring frost in Saint George Island falls between May 10 and June 23, a 44-day window. The first fall frost falls between September 17 and October 21.
- The median last frost is 10 days later than the Alaska median of May 21.
- Its 127-day growing season is longer than 62% of the 165 Alaska places with a regular frost season (state median 124 days).
- The last frost is 45 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 162 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 10 |
| 50% (median) | May 31 |
| 10% (safe for tender plants) | June 23 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 17 |
| 50% (median) | October 5 |
| 90% (late) | October 21 |
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 Saint George Island, AK
Saint George Island, AK frost dates — last frost May 31, first frost Oct 5, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Mar 8 to Mar 22Transplant outside: May 3 to May 17
Start indoors: Mar 22 to Apr 5Transplant outside: Jun 14 to Jun 28
Start indoors: Mar 22 to Apr 5Transplant outside: Jun 14 to Jun 28
Start indoors: Apr 5 to Apr 19Transplant outside: Jun 7 to Jun 21
Start indoors: Apr 5 to Apr 19Transplant outside: May 10 to May 24Sow outdoors: May 3 to Jun 7Plant for fall: Aug 10 to Sep 7
Start indoors: Apr 5 to Apr 19Transplant outside: May 3 to May 17Sow outdoors: May 3 to May 17Plant for fall: Jul 27 to Aug 17
Start indoors: Apr 5 to Apr 19Transplant outside: May 17 to May 31Plant for fall: Jun 29 to Jul 20
Start indoors: Apr 5 to Apr 19Transplant outside: May 10 to May 24Plant for fall: Jun 29 to Jul 20
Start indoors: Apr 5 to Apr 19Transplant outside: May 17 to May 31Plant for fall: Jun 29 to Jul 20
Start indoors: Apr 19 to May 3Transplant outside: Jun 21 to Jul 5Sow outdoors: Jun 21 to Jul 5
Start indoors: Apr 19 to May 3Transplant outside: Jun 7 to Jun 21
Sow outdoors: Apr 19 to May 10Plant for fall: Jul 13 to Aug 3
Sow outdoors: Apr 19 to May 10Plant for fall: Aug 10 to Aug 31
Sow outdoors: Apr 26 to Jun 7Plant for fall: Aug 24 to Sep 14
Start indoors: May 3 to May 10Transplant outside: Jun 14 to Jun 21Sow outdoors: Jun 7 to Jun 21Plant for fall: Jul 20 to Aug 3
Start indoors: May 3 to May 10Sow outdoors: Jun 7 to Jun 21Plant for fall: Jul 27 to Aug 10
Start indoors: May 3 to May 10Sow outdoors: Jun 7 to Jun 21
Start indoors: May 3 to May 10Transplant outside: Jun 14 to Jun 28
Sow outdoors: May 10 to Jun 7Plant for fall: Jul 13 to Jul 27
Sow outdoors: May 10 to Jun 7Plant for fall: Jul 27 to Aug 10
Sow outdoors: May 10 to May 31
Sow outdoors: May 17 to Jun 14Plant for fall: Jul 27 to Aug 10
Sow outdoors: May 17 to Jun 7Plant for fall: Aug 10 to Aug 31
Sow outdoors: Jun 7 to Jun 28Plant for fall: Jul 20 to Aug 3
Sow outdoors: Jun 7 to Jun 21
Transplant outside: Jun 14 to Jul 5
Plant for fall: Sep 21 to Oct 26
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Saint George Island, AK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 8 – Mar 22 | May 3 – May 17 | — | — |
| Peppers | Mar 22 – Apr 5 | Jun 14 – Jun 28 | — | — |
| Eggplant | Mar 22 – Apr 5 | Jun 14 – Jun 28 | — | — |
| Tomatoes | Apr 5 – Apr 19 | Jun 7 – Jun 21 | — | — |
| Lettuce | Apr 5 – Apr 19 | May 10 – May 24 | May 3 – Jun 7 | Aug 10 – Sep 7 |
| Kale | Apr 5 – Apr 19 | May 3 – May 17 | May 3 – May 17 | Jul 27 – Aug 17 |
| Broccoli | Apr 5 – Apr 19 | May 17 – May 31 | — | Jun 29 – Jul 20 |
| Cabbage | Apr 5 – Apr 19 | May 10 – May 24 | — | Jun 29 – Jul 20 |
| Cauliflower | Apr 5 – Apr 19 | May 17 – May 31 | — | Jun 29 – Jul 20 |
| Okra | Apr 19 – May 3 | Jun 21 – Jul 5 | Jun 21 – Jul 5 | — |
| Basil | Apr 19 – May 3 | Jun 7 – Jun 21 | — | — |
| Peas | — | — | Apr 19 – May 10 | Jul 13 – Aug 3 |
| Spinach | — | — | Apr 19 – May 10 | Aug 10 – Aug 31 |
| Radishes | — | — | Apr 26 – Jun 7 | Aug 24 – Sep 14 |
| Cucumbers | May 3 – May 10 | Jun 14 – Jun 21 | Jun 7 – Jun 21 | Jul 20 – Aug 3 |
| Zucchini & Summer Squash | May 3 – May 10 | — | Jun 7 – Jun 21 | Jul 27 – Aug 10 |
| Winter Squash & Pumpkins | May 3 – May 10 | — | Jun 7 – Jun 21 | — |
| Melons & Watermelon | May 3 – May 10 | Jun 14 – Jun 28 | — | — |
| Carrots | — | — | May 10 – Jun 7 | Jul 13 – Jul 27 |
| Beets | — | — | May 10 – Jun 7 | Jul 27 – Aug 10 |
| Potatoes | — | — | May 10 – May 31 | — |
| Swiss Chard | — | — | May 17 – Jun 14 | Jul 27 – Aug 10 |
| Cilantro | — | — | May 17 – Jun 7 | Aug 10 – Aug 31 |
| Green Beans | — | — | Jun 7 – Jun 28 | Jul 20 – Aug 3 |
| Sweet Corn | — | — | Jun 7 – Jun 21 | — |
| Sweet Potatoes | — | Jun 14 – Jul 5 | — | — |
| Garlic | — | — | — | Sep 21 – Oct 26 |
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 St George Island Ap, AK weather station, 3 km away (elevation 125 ft (38 m)).
Frost dates near Saint George Island
- Saint Paul Island Jun 4 · Sep 28
- Dutch Harbor May 6 · Oct 18
- Unalaska May 6 · Oct 18
- Akutan May 6 · Oct 18
- False Pass May 25 · Oct 4
- Cold Bay May 25 · Oct 4
- King Cove May 25 · Oct 4
- Chefornak May 21 · Sep 22
- Kwigillingok May 21 · Sep 22
- Kongiganak May 21 · Sep 22
Frequently asked questions
When is the last frost in Saint George Island, AK?
The median last spring frost in Saint George Island, AK is May 31. There is still about a 10% chance of frost after June 23, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Saint George Island, AK?
The median first fall frost is October 5, with about a 10% chance of frost before September 17.
How long is the growing season in Saint George Island, AK?
About 127 days between the median last spring frost and first fall frost.
What planting zone is Saint George Island, AK?
Saint George Island, AK is in USDA hardiness zone 7a.