Alaska Planting Zones
Alaska runs from zone 1a to zone 8b on the 2023 USDA map. Zone 5a is the most common, covering 12% of the state's ZIP codes. Anchorage is 5a, Juneau is 6a and Fairbanks is 2a.
Zones across Alaska
| Zone | Average coldest night | Share of Alaska ZIP codes |
|---|---|---|
| 1a | −60 to −55°F | 2% |
| 1b | −55 to −50°F | 4% |
| 2a | −50 to −45°F | 10% |
| 2b | −45 to −40°F | 6% |
| 3a | −40 to −35°F | 7% |
| 3b | −35 to −30°F | 10% |
| 4a | −30 to −25°F | 11% |
| 4b | −25 to −20°F | 10% |
| 5a | −20 to −15°F | 12% |
| 5b | −15 to −10°F | 6% |
| 6a | −10 to −5°F | 1% |
| 6b | −5 to 0°F | 3% |
| 7a | 0 to 5°F | 8% |
| 7b | 5 to 10°F | 6% |
| 8a | 10 to 15°F | 3% |
| 8b | 15 to 20°F | 1% |
Planting zone for every city and town in Alaska
Each Alaska town uses the ZIP code at its center. Big towns can cross into the next half-zone, so look up your own ZIP if you're near a line.
| City | Zone | Average coldest night |
|---|---|---|
| Adak | 8b | 15 to 20°F |
| Akhiok | 7b | 5 to 10°F |
| Akiak | 3b | −35 to −30°F |
| Akutan | 8a | 10 to 15°F |
| Alakanuk | 4a | −30 to −25°F |
| Aleknagik | 4b | −25 to −20°F |
| Allakaket | 1a | −60 to −55°F |
| Ambler | 1b | −55 to −50°F |
| Anaktuvuk Pass | 2b | −45 to −40°F |
| Anchorage | 5a | −20 to −15°F |
| Anderson | 2a | −50 to −45°F |
| Angoon | 7a | 0 to 5°F |
| Aniak | 3b | −35 to −30°F |
| Anvik | 3b | −35 to −30°F |
| Atka | 8b | 15 to 20°F |
| Atqasuk | 2a | −50 to −45°F |
| Bethel | 4a | −30 to −25°F |
| Bettles | 1b | −55 to −50°F |
| Brevig Mission | 3a | −40 to −35°F |
| Buckland | 2b | −45 to −40°F |
| Chefornak | 4a | −30 to −25°F |
| Chevak | 4a | −30 to −25°F |
| Chignik | 6b | −5 to 0°F |
| Chuathbaluk | 3b | −35 to −30°F |
| Clark's Point | 4b | −25 to −20°F |
| Coffman Cove | 8a | 10 to 15°F |
| Cold Bay | 7a | 0 to 5°F |
| Cordova | 5a | −20 to −15°F |
| Craig | 7b | 5 to 10°F |
| Deering | 3a | −40 to −35°F |
| Delta Junction | 3a | −40 to −35°F |
| Dillingham | 4b | −25 to −20°F |
| Diomede | 3b | −35 to −30°F |
| Eagle | 1b | −55 to −50°F |
| Edna Bay | 8a | 10 to 15°F |
| Eek | 4a | −30 to −25°F |
| Egegik | 5a | −20 to −15°F |
| Ekwok | 4b | −25 to −20°F |
| Elim | 3b | −35 to −30°F |
| Emmonak | 4a | −30 to −25°F |
| Fairbanks | 2a | −50 to −45°F |
| False Pass | 7a | 0 to 5°F |
| Fort Yukon | 1a | −60 to −55°F |
| Galena | 1b | −55 to −50°F |
| Gambell | 4b | −25 to −20°F |
| Golovin | 4a | −30 to −25°F |
| Goodnews Bay | 4b | −25 to −20°F |
| Grayling | 3a | −40 to −35°F |
| Gustavus | 7a | 0 to 5°F |
| Holy Cross | 3a | −40 to −35°F |
| Homer | 6a | −10 to −5°F |
| Hoonah | 7a | 0 to 5°F |
| Hooper Bay | 4b | −25 to −20°F |
| Houston | 4a | −30 to −25°F |
| Hughes | 1b | −55 to −50°F |
| Huslia | 2a | −50 to −45°F |
| Hydaburg | 8a | 10 to 15°F |
| Juneau | 6a | −10 to −5°F |
| Kachemak | 6a | −10 to −5°F |
| Kake | 7b | 5 to 10°F |
| Kaktovik | 3a | −40 to −35°F |
| Kaltag | 2a | −50 to −45°F |
| Kasaan | 7b | 5 to 10°F |
| Kenai | 5a | −20 to −15°F |
| Ketchikan | 8a | 10 to 15°F |
| Kiana | 2a | −50 to −45°F |
| King Cove | 7a | 0 to 5°F |
| Kivalina | 3a | −40 to −35°F |
| Klawock | 7b | 5 to 10°F |
| Kobuk | 1b | −55 to −50°F |
| Kodiak | 7b | 5 to 10°F |
| Kotlik | 4a | −30 to −25°F |
| Kotzebue | 2b | −45 to −40°F |
| Koyuk | 3b | −35 to −30°F |
| Koyukuk | 2a | −50 to −45°F |
| Kupreanof | 7b | 5 to 10°F |
| Kwethluk | 4a | −30 to −25°F |
| Larsen Bay | 7b | 5 to 10°F |
| Lower Kalskag | 3b | −35 to −30°F |
| Manokotak | 4b | −25 to −20°F |
| Marshall | 3b | −35 to −30°F |
| McGrath | 2b | −45 to −40°F |
| Mekoryuk | 5a | −20 to −15°F |
| Mountain Village | 4a | −30 to −25°F |
| Napakiak | 4a | −30 to −25°F |
| Napaskiak | 4a | −30 to −25°F |
| Nenana | 2a | −50 to −45°F |
| New Stuyahok | 4b | −25 to −20°F |
| Newhalen | 4b | −25 to −20°F |
| Nightmute | 4a | −30 to −25°F |
| Nikolai | 2b | −45 to −40°F |
| Nome | 3b | −35 to −30°F |
| Nondalton | 4b | −25 to −20°F |
| Noorvik | 2b | −45 to −40°F |
| North Pole | 2a | −50 to −45°F |
| Nuiqsut | 2a | −50 to −45°F |
| Nulato | 2a | −50 to −45°F |
| Nunam Iqua | 4a | −30 to −25°F |
| Nunapitchuk | 4a | −30 to −25°F |
| Old Harbor | 7b | 5 to 10°F |
| Ouzinkie | 7b | 5 to 10°F |
| Palmer | 5a | −20 to −15°F |
| Pelican | 7a | 0 to 5°F |
| Pilot Point | 5a | −20 to −15°F |
| Pilot Station | 4a | −30 to −25°F |
| Platinum | 4b | −25 to −20°F |
| Point Hope | 3a | −40 to −35°F |
| Port Alexander | 8a | 10 to 15°F |
| Port Heiden | 5b | −15 to −10°F |
| Port Lions | 7a | 0 to 5°F |
| Quinhagak | 4b | −25 to −20°F |
| Ruby | 1b | −55 to −50°F |
| Russian Mission | 3b | −35 to −30°F |
| Sand Point | 7b | 5 to 10°F |
| Savoonga | 4a | −30 to −25°F |
| Saxman | 8a | 10 to 15°F |
| Scammon Bay | 4b | −25 to −20°F |
| Selawik | 2a | −50 to −45°F |
| Seldovia | 6b | −5 to 0°F |
| Seward | 5b | −15 to −10°F |
| Shageluk | 3a | −40 to −35°F |
| Shaktoolik | 3b | −35 to −30°F |
| Shishmaref | 3a | −40 to −35°F |
| Shungnak | 1b | −55 to −50°F |
| Sitka | 7b | 5 to 10°F |
| Soldotna | 5a | −20 to −15°F |
| St. George | 7a | 0 to 5°F |
| St. Mary's | 4a | −30 to −25°F |
| St. Michael | 3b | −35 to −30°F |
| St. Paul | 6b | −5 to 0°F |
| Stebbins | 3b | −35 to −30°F |
| Tanana | 1b | −55 to −50°F |
| Teller | 3a | −40 to −35°F |
| Tenakee Springs | 7a | 0 to 5°F |
| Thorne Bay | 7b | 5 to 10°F |
| Togiak | 4b | −25 to −20°F |
| Toksook Bay | 4a | −30 to −25°F |
| Unalakleet | 3b | −35 to −30°F |
| Unalaska | 8b | 15 to 20°F |
| Upper Kalskag | 3b | −35 to −30°F |
| Utqiagvik | 2b | −45 to −40°F |
| Valdez | 5a | −20 to −15°F |
| Wainwright | 2b | −45 to −40°F |
| Wales | 3b | −35 to −30°F |
| Wasilla | 4a | −30 to −25°F |
| Whale Pass | 8a | 10 to 15°F |
| White Mountain | 4a | −30 to −25°F |
| Whittier | 5b | −15 to −10°F |
| Wrangell | 7b | 5 to 10°F |
Source: USDA Plant Hardiness Zone Map, 2023, Agricultural Research Service, U.S. Department of Agriculture; ZIP code table from the PRISM Group, Oregon State University (accessed Oct 2026). This list is our own summary, not the official USDA map. See how we calculate.
Frequently asked questions
What planting zone is Alaska?
Alaska spans zones 1a to 8b on the 2023 USDA map, and zone 5a is the most common. Look up your ZIP code for your exact zone.
What zone is Anchorage, AK?
Anchorage is zone 5a, where the coldest night of an average winter falls from −20 to −15°F. Plants rated hardy to zone 5 or colder should survive a typical winter there.
More for Alaska: Alaska climate zones (insulation) · Last frost dates in Alaska · Frost line depth by state