Tanana, AK frost dates
Last spring frostMay 29median date
First fall frostAug 28median date
Growing season91 daysfrost-free
Hardiness zone1bZone 1b
How Tanana compares
- In 8 years out of 10, the last spring frost in Tanana falls between May 15 and June 16, a 32-day window. The first fall frost falls between August 10 and September 9.
- The median last frost is 8 days later than the Alaska median of May 21.
- Its 91-day growing season is longer than 7% of the 165 Alaska places with a regular frost season (state median 124 days).
- The weather station records an average of 236 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 15 |
| 50% (median) | May 29 |
| 10% (safe for tender plants) | June 16 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 10 |
| 50% (median) | August 28 |
| 90% (late) | September 9 |
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 Tanana, AK
Tanana, AK frost dates — last frost May 29, first frost Aug 28, zone 1b. whenisthelastfrost.com
Crop
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Start indoors: Mar 6 to Mar 20Transplant outside: May 1 to May 15
Start indoors: Mar 20 to Apr 3Transplant outside: Jun 12 to Jun 26
Start indoors: Mar 20 to Apr 3Transplant outside: Jun 12 to Jun 26
Start indoors: Apr 3 to Apr 17Transplant outside: Jun 5 to Jun 19
Start indoors: Apr 3 to Apr 17Transplant outside: May 8 to May 22Sow outdoors: May 1 to Jun 5Plant for fall: Jul 3 to Jul 31
Start indoors: Apr 3 to Apr 17Transplant outside: May 1 to May 15Sow outdoors: May 1 to May 15Plant for fall: Jun 19 to Jul 10
Start indoors: Apr 3 to Apr 17Transplant outside: May 15 to May 29
Start indoors: Apr 3 to Apr 17Transplant outside: May 8 to May 22
Start indoors: Apr 3 to Apr 17Transplant outside: May 15 to May 29
Start indoors: Apr 17 to May 1Transplant outside: Jun 19 to Jul 3Sow outdoors: Jun 19 to Jul 3
Start indoors: Apr 17 to May 1Transplant outside: Jun 5 to Jun 19
Sow outdoors: Apr 17 to May 8
Sow outdoors: Apr 17 to May 8Plant for fall: Jul 3 to Jul 24
Sow outdoors: Apr 24 to Jun 5Plant for fall: Jul 17 to Aug 7
Start indoors: May 1 to May 8Transplant outside: Jun 12 to Jun 19Sow outdoors: Jun 5 to Jun 19
Start indoors: May 1 to May 8Sow outdoors: Jun 5 to Jun 19
Start indoors: May 1 to May 8Sow outdoors: Jun 5 to Jun 19
Start indoors: May 1 to May 8Transplant outside: Jun 12 to Jun 26
Sow outdoors: May 8 to Jun 5
Sow outdoors: May 8 to Jun 5
Sow outdoors: May 8 to May 29
Sow outdoors: May 15 to Jun 12
Sow outdoors: May 15 to Jun 5Plant for fall: Jul 3 to Jul 24
Sow outdoors: Jun 5 to Jun 26
Sow outdoors: Jun 5 to Jun 19
Transplant outside: Jun 12 to Jul 3
Plant for fall: Aug 14 to Sep 18
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Tanana, AK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 6 – Mar 20 | May 1 – May 15 | — | — |
| Peppers | Mar 20 – Apr 3 | Jun 12 – Jun 26 | — | — |
| Eggplant | Mar 20 – Apr 3 | Jun 12 – Jun 26 | — | — |
| Tomatoes | Apr 3 – Apr 17 | Jun 5 – Jun 19 | — | — |
| Lettuce | Apr 3 – Apr 17 | May 8 – May 22 | May 1 – Jun 5 | Jul 3 – Jul 31 |
| Kale | Apr 3 – Apr 17 | May 1 – May 15 | May 1 – May 15 | Jun 19 – Jul 10 |
| Broccoli | Apr 3 – Apr 17 | May 15 – May 29 | — | — |
| Cabbage | Apr 3 – Apr 17 | May 8 – May 22 | — | — |
| Cauliflower | Apr 3 – Apr 17 | May 15 – May 29 | — | — |
| Okra | Apr 17 – May 1 | Jun 19 – Jul 3 | Jun 19 – Jul 3 | — |
| Basil | Apr 17 – May 1 | Jun 5 – Jun 19 | — | — |
| Peas | — | — | Apr 17 – May 8 | — |
| Spinach | — | — | Apr 17 – May 8 | Jul 3 – Jul 24 |
| Radishes | — | — | Apr 24 – Jun 5 | Jul 17 – Aug 7 |
| Cucumbers | May 1 – May 8 | Jun 12 – Jun 19 | Jun 5 – Jun 19 | — |
| Zucchini & Summer Squash | May 1 – May 8 | — | Jun 5 – Jun 19 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 91 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 1 – May 8 | — | Jun 5 – Jun 19 | — |
| Melons & Watermelon Warning: Your frost-free season is about 91 days, which is tight for melons & watermelon (85+ days). Choose early varieties and use transplants or row covers. | May 1 – May 8 | Jun 12 – Jun 26 | — | — |
| Carrots | — | — | May 8 – Jun 5 | — |
| Beets | — | — | May 8 – Jun 5 | — |
| Potatoes | — | — | May 8 – May 29 | — |
| Swiss Chard | — | — | May 15 – Jun 12 | — |
| Cilantro | — | — | May 15 – Jun 5 | Jul 3 – Jul 24 |
| Green Beans | — | — | Jun 5 – Jun 26 | — |
| Sweet Corn Warning: Your frost-free season is about 91 days, which is tight for sweet corn (80+ days). Choose early varieties and use transplants or row covers. | — | — | Jun 5 – Jun 19 | — |
| Sweet Potatoes Warning: Your frost-free season is about 91 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 12 – Jul 3 | — | — |
| Garlic | — | — | — | Aug 14 – Sep 18 |
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 Tanana Calhoun Mem Ap, AK weather station, about 1 km away (elevation 226 ft (69 m)).
Frost dates near Tanana
- Bettles Field frost any month
- Manley Hot Springs frost any month
- Rampart frost any month
- Minto frost any month
- Hughes May 29 · Aug 28
- Lake Minchumina May 13 · Sep 17
- Nenana May 15 · Sep 11
- Allakaket May 22 · Aug 24
- Anderson May 24 · Sep 4
- Stevens Village frost any month
Frequently asked questions
When is the last frost in Tanana, AK?
The median last spring frost in Tanana, AK is May 29. There is still about a 10% chance of frost after June 16, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Tanana, AK?
The median first fall frost is August 28, with about a 10% chance of frost before August 10.
How long is the growing season in Tanana, AK?
About 91 days between the median last spring frost and first fall frost.
What planting zone is Tanana, AK?
Tanana, AK is in USDA hardiness zone 1b.