Two Rivers, AK frost dates
Last spring frostMay 30median date
First fall frostSep 2median date
Growing season95 daysfrost-free
Hardiness zone2aZone 2a
How Two Rivers compares
- In 8 years out of 10, the last spring frost in Two Rivers falls between May 12 and June 13, a 32-day window. The first fall frost falls between August 13 and September 17.
- The median last frost is 9 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 6 days later than the zone 2a median of May 24. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 2a chart.
- 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 12 |
| 50% (median) | May 30 |
| 10% (safe for tender plants) | June 13 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 13 |
| 50% (median) | September 2 |
| 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 Two Rivers, AK
Two Rivers, AK frost dates — last frost May 30, first frost Sep 2, zone 2a. whenisthelastfrost.com
Crop
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Start indoors: Mar 7 to Mar 21Transplant outside: May 2 to May 16
Start indoors: Mar 21 to Apr 4Transplant outside: Jun 13 to Jun 27
Start indoors: Mar 21 to Apr 4Transplant outside: Jun 13 to Jun 27
Start indoors: Apr 4 to Apr 18Transplant outside: Jun 6 to Jun 20
Start indoors: Apr 4 to Apr 18Transplant outside: May 9 to May 23Sow outdoors: May 2 to Jun 6Plant for fall: Jul 8 to Aug 5
Start indoors: Apr 4 to Apr 18Transplant outside: May 2 to May 16Sow outdoors: May 2 to May 16Plant for fall: Jun 24 to Jul 15
Start indoors: Apr 4 to Apr 18Transplant outside: May 16 to May 30
Start indoors: Apr 4 to Apr 18Transplant outside: May 9 to May 23
Start indoors: Apr 4 to Apr 18Transplant outside: May 16 to May 30
Start indoors: Apr 18 to May 2Transplant outside: Jun 20 to Jul 4Sow outdoors: Jun 20 to Jul 4
Start indoors: Apr 18 to May 2Transplant outside: Jun 6 to Jun 20
Sow outdoors: Apr 18 to May 9
Sow outdoors: Apr 18 to May 9Plant for fall: Jul 8 to Jul 29
Sow outdoors: Apr 25 to Jun 6Plant for fall: Jul 22 to Aug 12
Start indoors: May 2 to May 9Transplant outside: Jun 13 to Jun 20Sow outdoors: Jun 6 to Jun 20
Start indoors: May 2 to May 9Sow outdoors: Jun 6 to Jun 20
Start indoors: May 2 to May 9Sow outdoors: Jun 6 to Jun 20
Start indoors: May 2 to May 9Transplant outside: Jun 13 to Jun 27
Sow outdoors: May 9 to Jun 6
Sow outdoors: May 9 to Jun 6Plant for fall: Jun 24 to Jul 8
Sow outdoors: May 9 to May 30
Sow outdoors: May 16 to Jun 13
Sow outdoors: May 16 to Jun 6Plant for fall: Jul 8 to Jul 29
Sow outdoors: Jun 6 to Jun 27
Sow outdoors: Jun 6 to Jun 20
Transplant outside: Jun 13 to Jul 4
Plant for fall: Aug 19 to Sep 23
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Two Rivers, AK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 7 – Mar 21 | May 2 – May 16 | — | — |
| Peppers | Mar 21 – Apr 4 | Jun 13 – Jun 27 | — | — |
| Eggplant | Mar 21 – Apr 4 | Jun 13 – Jun 27 | — | — |
| Tomatoes | Apr 4 – Apr 18 | Jun 6 – Jun 20 | — | — |
| Lettuce | Apr 4 – Apr 18 | May 9 – May 23 | May 2 – Jun 6 | Jul 8 – Aug 5 |
| Kale | Apr 4 – Apr 18 | May 2 – May 16 | May 2 – May 16 | Jun 24 – Jul 15 |
| Broccoli | Apr 4 – Apr 18 | May 16 – May 30 | — | — |
| Cabbage | Apr 4 – Apr 18 | May 9 – May 23 | — | — |
| Cauliflower | Apr 4 – Apr 18 | May 16 – May 30 | — | — |
| Okra | Apr 18 – May 2 | Jun 20 – Jul 4 | Jun 20 – Jul 4 | — |
| Basil | Apr 18 – May 2 | Jun 6 – Jun 20 | — | — |
| Peas | — | — | Apr 18 – May 9 | — |
| Spinach | — | — | Apr 18 – May 9 | Jul 8 – Jul 29 |
| Radishes | — | — | Apr 25 – Jun 6 | Jul 22 – Aug 12 |
| Cucumbers | May 2 – May 9 | Jun 13 – Jun 20 | Jun 6 – Jun 20 | — |
| Zucchini & Summer Squash | May 2 – May 9 | — | Jun 6 – Jun 20 | — |
| 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 2 – May 9 | — | Jun 6 – Jun 20 | — |
| 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 2 – May 9 | Jun 13 – Jun 27 | — | — |
| Carrots | — | — | May 9 – Jun 6 | — |
| Beets | — | — | May 9 – Jun 6 | Jun 24 – Jul 8 |
| Potatoes | — | — | May 9 – May 30 | — |
| Swiss Chard | — | — | May 16 – Jun 13 | — |
| Cilantro | — | — | May 16 – Jun 6 | Jul 8 – Jul 29 |
| Green Beans | — | — | Jun 6 – Jun 27 | — |
| Sweet Corn | — | — | Jun 6 – Jun 20 | — |
| 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 13 – Jul 4 | — | — |
| Garlic | — | — | — | Aug 19 – Sep 23 |
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 Two Rivers, AK weather station, 3 km away (elevation 604 ft (184 m)).
Frost dates near Two Rivers
- Eielson Afb May 20 · Sep 1
- North Pole May 22 · Sep 2
- Fort Wainwright May 16 · Sep 6
- Fairbanks May 16 · Sep 6
- Salcha May 20 · Sep 1
- Ester May 24 · Sep 1
- Fort Greely May 26 · Sep 2
- Delta Junction May 17 · Sep 7
- Nenana May 15 · Sep 11
- Central frost any month
Frequently asked questions
When is the last frost in Two Rivers, AK?
The median last spring frost in Two Rivers, AK is May 30. There is still about a 10% chance of frost after June 13, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Two Rivers, AK?
The median first fall frost is September 2, with about a 10% chance of frost before August 13.
How long is the growing season in Two Rivers, AK?
About 95 days between the median last spring frost and first fall frost.
What planting zone is Two Rivers, AK?
Two Rivers, AK is in USDA hardiness zone 2a.