Klawock, AK frost dates
Last spring frostApr 29median date
First fall frostOct 16median date
Growing season170 daysfrost-free
Hardiness zone7bZone 7b
How Klawock compares
- In 8 years out of 10, the last spring frost in Klawock falls between April 13 and May 14, a 31-day window. The first fall frost falls between October 1 and November 5.
- The median last frost is 22 days earlier than the Alaska median of May 21.
- Its 170-day growing season is longer than 89% of the 165 Alaska places with a regular frost season (state median 124 days).
- The last frost is 24 days later than the zone 7b median of Apr 5. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7b chart.
- The weather station records an average of 94 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 13 |
| 50% (median) | April 29 |
| 10% (safe for tender plants) | May 14 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 1 |
| 50% (median) | October 16 |
| 90% (late) | November 5 |
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 Klawock, AK
Klawock, AK frost dates — last frost Apr 29, first frost Oct 16, zone 7b. whenisthelastfrost.com
Crop
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Start indoors: Feb 4 to Feb 18Transplant outside: Apr 1 to Apr 15
Start indoors: Feb 18 to Mar 4Transplant outside: May 13 to May 27
Start indoors: Feb 18 to Mar 4Transplant outside: May 13 to May 27
Start indoors: Mar 4 to Mar 18Transplant outside: May 6 to May 20
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 8 to Apr 22Sow outdoors: Apr 1 to May 6Plant for fall: Aug 21 to Sep 18
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 1 to Apr 15Sow outdoors: Apr 1 to Apr 15Plant for fall: Aug 7 to Aug 28
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 15 to Apr 29Plant for fall: Jul 10 to Jul 31
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 8 to Apr 22Plant for fall: Jul 10 to Jul 31
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 15 to Apr 29Plant for fall: Jul 10 to Jul 31
Start indoors: Mar 18 to Apr 1Transplant outside: May 20 to Jun 3Sow outdoors: May 20 to Jun 3
Start indoors: Mar 18 to Apr 1Transplant outside: May 6 to May 20
Sow outdoors: Mar 18 to Apr 8Plant for fall: Jul 24 to Aug 14
Sow outdoors: Mar 18 to Apr 8Plant for fall: Aug 21 to Sep 11
Sow outdoors: Mar 25 to May 6Plant for fall: Sep 4 to Sep 25
Start indoors: Apr 1 to Apr 8Transplant outside: May 13 to May 20Sow outdoors: May 6 to May 20Plant for fall: Jul 31 to Aug 14
Start indoors: Apr 1 to Apr 8Sow outdoors: May 6 to May 20Plant for fall: Aug 7 to Aug 21
Start indoors: Apr 1 to Apr 8Sow outdoors: May 6 to May 20
Start indoors: Apr 1 to Apr 8Transplant outside: May 13 to May 27
Sow outdoors: Apr 8 to May 6Plant for fall: Jul 24 to Aug 7
Sow outdoors: Apr 8 to May 6Plant for fall: Aug 7 to Aug 21
Sow outdoors: Apr 8 to Apr 29
Sow outdoors: Apr 15 to May 13Plant for fall: Aug 7 to Aug 21
Sow outdoors: Apr 15 to May 6Plant for fall: Aug 21 to Sep 11
Sow outdoors: May 6 to May 27Plant for fall: Jul 31 to Aug 14
Sow outdoors: May 6 to May 20
Transplant outside: May 13 to Jun 3
Plant for fall: Oct 2 to Nov 6
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Klawock, AK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 4 – Feb 18 | Apr 1 – Apr 15 | — | — |
| Peppers | Feb 18 – Mar 4 | May 13 – May 27 | — | — |
| Eggplant | Feb 18 – Mar 4 | May 13 – May 27 | — | — |
| Tomatoes | Mar 4 – Mar 18 | May 6 – May 20 | — | — |
| Lettuce | Mar 4 – Mar 18 | Apr 8 – Apr 22 | Apr 1 – May 6 | Aug 21 – Sep 18 |
| Kale | Mar 4 – Mar 18 | Apr 1 – Apr 15 | Apr 1 – Apr 15 | Aug 7 – Aug 28 |
| Broccoli | Mar 4 – Mar 18 | Apr 15 – Apr 29 | — | Jul 10 – Jul 31 |
| Cabbage | Mar 4 – Mar 18 | Apr 8 – Apr 22 | — | Jul 10 – Jul 31 |
| Cauliflower | Mar 4 – Mar 18 | Apr 15 – Apr 29 | — | Jul 10 – Jul 31 |
| Okra | Mar 18 – Apr 1 | May 20 – Jun 3 | May 20 – Jun 3 | — |
| Basil | Mar 18 – Apr 1 | May 6 – May 20 | — | — |
| Peas | — | — | Mar 18 – Apr 8 | Jul 24 – Aug 14 |
| Spinach | — | — | Mar 18 – Apr 8 | Aug 21 – Sep 11 |
| Radishes | — | — | Mar 25 – May 6 | Sep 4 – Sep 25 |
| Cucumbers | Apr 1 – Apr 8 | May 13 – May 20 | May 6 – May 20 | Jul 31 – Aug 14 |
| Zucchini & Summer Squash | Apr 1 – Apr 8 | — | May 6 – May 20 | Aug 7 – Aug 21 |
| Winter Squash & Pumpkins | Apr 1 – Apr 8 | — | May 6 – May 20 | — |
| Melons & Watermelon | Apr 1 – Apr 8 | May 13 – May 27 | — | — |
| Carrots | — | — | Apr 8 – May 6 | Jul 24 – Aug 7 |
| Beets | — | — | Apr 8 – May 6 | Aug 7 – Aug 21 |
| Potatoes | — | — | Apr 8 – Apr 29 | — |
| Swiss Chard | — | — | Apr 15 – May 13 | Aug 7 – Aug 21 |
| Cilantro | — | — | Apr 15 – May 6 | Aug 21 – Sep 11 |
| Green Beans | — | — | May 6 – May 27 | Jul 31 – Aug 14 |
| Sweet Corn | — | — | May 6 – May 20 | — |
| Sweet Potatoes | — | May 13 – Jun 3 | — | — |
| Garlic | — | — | — | Oct 2 – Nov 6 |
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 Klawock Ap, AK weather station, 3 km away (elevation 13 ft (4 m)).
Frost dates near Klawock
- Craig Apr 14 · Nov 1
- Thorne Bay May 1 · Oct 13
- Hydaburg Apr 14 · Nov 1
- Coffman Cove May 1 · Oct 13
- Meyers Chuck May 1 · Oct 13
- Ward Cove Apr 4 · Nov 9
- Ketchikan Apr 4 · Nov 9
- Point Baker Apr 19 · Oct 25
- Metlakatla Apr 14 · Oct 25
- Wrangell Apr 11 · Nov 1
Frequently asked questions
When is the last frost in Klawock, AK?
The median last spring frost in Klawock, AK is April 29. There is still about a 10% chance of frost after May 14, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Klawock, AK?
The median first fall frost is October 16, with about a 10% chance of frost before October 1.
How long is the growing season in Klawock, AK?
About 170 days between the median last spring frost and first fall frost.
What planting zone is Klawock, AK?
Klawock, AK is in USDA hardiness zone 7b.