Frost dates for Adak, AK
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
May 31
typical year
Safe to plant
June 23
frost is over in 9 of 10 years
First fall frost
October 5
typical year
Growing season
128 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | May 3 – 17 | – |
| Spinach | – | Apr 19 – May 10 | Aug 10 – 24 |
| Lettuce | – | May 3 – 24 | Aug 10 – 24 |
| Radishes | – | May 3 – Jun 14 | Aug 24 – Sep 7 |
| Onions | – | May 3 – 17 | – |
| Potatoes | – | May 10 – 24 | – |
| Carrots | – | May 10 – 31 | Jul 13 – 27 |
| Beets | – | May 3 – 17 | Jul 27 – Aug 10 |
| Kale | Mar 22 – Apr 5 | May 3 – 17 | Jul 27 – Aug 10 |
| Broccoli | Mar 22 – Apr 5 | May 17 – 31 | Jul 27 – Aug 10 |
| Cabbage | Mar 8 – 22 | May 3 – 17 | Jul 27 – Aug 10 |
| Garlic | – | – | Aug 24 – Sep 14 |
| Warm-season crops | |||
| Tomatoes | Apr 28 – May 12 | Jun 23 – Jul 7 | – |
| Peppers | Apr 21 – May 5 | Jun 30 – Jul 14 | – |
| Cucumbers | – | Jun 23 – Jul 14 | – |
| Zucchini | – | Jun 23 – Jul 21 | – |
| Pumpkins | – | Jun 23 – Jul 14 | – |
| Green beans | – | Jun 23 – Jul 27 | – |
| Sweet corn | – | Jun 23 – Jul 21 | – |
| Basil | May 19 – Jun 2 | Jun 30 – Jul 7 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | June 23 | May 31 | May 10 |
| Fall frost before | September 17 | October 5 | October 21 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around May 9 (May 29 in a late year), and the first one in fall around October 24.
Towns that use these dates
This is the nearest NOAA station with frost records for 2 towns.
Adak, St. George
Where these dates come from
NOAA weather station ST GEORGE ISLAND AP, AK US (USW00025628), 1991–2020 climate normals. It's the nearest station for 2 zip codes, all within 434 miles:
99546, 99591
1 of these zip codes are more than 30 miles from the station, so their real frost dates may differ by a week or more.
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.