Chitina, AK frost dates
Last spring frostMay 31median date
First fall frostSep 3median date
Growing season95 daysfrost-free
Hardiness zone4bZone 4b
How Chitina compares
- In 8 years out of 10, the last spring frost in Chitina falls between May 20 and June 10, a 21-day window. The first fall frost falls between August 20 and September 17.
- The median last frost is 10 days later than the Alaska median of May 21.
- Its 95-day growing season is longer than 15% of the 165 Alaska places with a regular frost season (state median 124 days).
- The last frost is 23 days later than the zone 4b median of May 8. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 4b chart.
- The weather station records an average of 246 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 20 |
| 50% (median) | May 31 |
| 10% (safe for tender plants) | June 10 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 20 |
| 50% (median) | September 3 |
| 90% (late) | September 17 |
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 Chitina, AK
Chitina, AK frost dates — last frost May 31, first frost Sep 3, zone 4b. 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: Jul 9 to Aug 6
Start indoors: Apr 5 to Apr 19Transplant outside: May 3 to May 17Sow outdoors: May 3 to May 17Plant for fall: Jun 25 to Jul 16
Start indoors: Apr 5 to Apr 19Transplant outside: May 17 to May 31
Start indoors: Apr 5 to Apr 19Transplant outside: May 10 to May 24
Start indoors: Apr 5 to Apr 19Transplant outside: May 17 to May 31
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 10
Sow outdoors: Apr 19 to May 10Plant for fall: Jul 9 to Jul 30
Sow outdoors: Apr 26 to Jun 7Plant for fall: Jul 23 to Aug 13
Start indoors: May 3 to May 10Transplant outside: Jun 14 to Jun 21Sow outdoors: Jun 7 to Jun 21
Start indoors: May 3 to May 10Sow outdoors: Jun 7 to Jun 21
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 7
Sow outdoors: May 10 to Jun 7Plant for fall: Jun 25 to Jul 9
Sow outdoors: May 10 to May 31
Sow outdoors: May 17 to Jun 14
Sow outdoors: May 17 to Jun 7Plant for fall: Jul 9 to Jul 30
Sow outdoors: Jun 7 to Jun 28
Sow outdoors: Jun 7 to Jun 21
Transplant outside: Jun 14 to Jul 5
Plant for fall: Aug 20 to Sep 24
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Chitina, 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 | Jul 9 – Aug 6 |
| Kale | Apr 5 – Apr 19 | May 3 – May 17 | May 3 – May 17 | Jun 25 – Jul 16 |
| Broccoli | Apr 5 – Apr 19 | May 17 – May 31 | — | — |
| Cabbage | Apr 5 – Apr 19 | May 10 – May 24 | — | — |
| Cauliflower | Apr 5 – Apr 19 | May 17 – May 31 | — | — |
| 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 | — |
| Spinach | — | — | Apr 19 – May 10 | Jul 9 – Jul 30 |
| Radishes | — | — | Apr 26 – Jun 7 | Jul 23 – Aug 13 |
| Cucumbers | May 3 – May 10 | Jun 14 – Jun 21 | Jun 7 – Jun 21 | — |
| Zucchini & Summer Squash | May 3 – May 10 | — | Jun 7 – Jun 21 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 95 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 3 – May 10 | — | Jun 7 – Jun 21 | — |
| Melons & Watermelon Warning: Your frost-free season is about 95 days, which is tight for melons & watermelon (85+ days). Choose early varieties and use transplants or row covers. | May 3 – May 10 | Jun 14 – Jun 28 | — | — |
| Carrots | — | — | May 10 – Jun 7 | — |
| Beets | — | — | May 10 – Jun 7 | Jun 25 – Jul 9 |
| Potatoes | — | — | May 10 – May 31 | — |
| Swiss Chard | — | — | May 17 – Jun 14 | — |
| Cilantro | — | — | May 17 – Jun 7 | Jul 9 – Jul 30 |
| Green Beans | — | — | Jun 7 – Jun 28 | — |
| Sweet Corn | — | — | Jun 7 – Jun 21 | — |
| Sweet Potatoes Warning: Your frost-free season is about 95 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 14 – Jul 5 | — | — |
| Garlic | — | — | — | Aug 20 – Sep 24 |
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 Silver Lake, AK weather station, 13 km away (elevation 1,201 ft (366 m)).
Frost dates near Chitina
- Copper Center frost any month
- Glennallen frost any month
- Gakona Jun 7 · Aug 21
- Cordova Apr 29 · Oct 13
- Tatitlek May 14 · Sep 22
- Valdez May 14 · Sep 22
- Northway May 26 · Sep 1
- Tanacross frost any month
- Tok Jun 3 · Aug 27
- Sutton Jun 1 · Sep 6
Frequently asked questions
When is the last frost in Chitina, AK?
The median last spring frost in Chitina, AK is May 31. 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 Chitina, AK?
The median first fall frost is September 3, with about a 10% chance of frost before August 20.
How long is the growing season in Chitina, AK?
About 95 days between the median last spring frost and first fall frost.
What planting zone is Chitina, AK?
Chitina, AK is in USDA hardiness zone 4b.