Alaska Frost Dates
Alaska gardening is shaped by a short, intense season that varies dramatically from the rainy southern coast to the colder interior and far north. Gardeners watch for lingering spring frost and an early autumn return, while coastal spots often behave more gently than inland valleys.
Look up your exact frost dates
Frost timing shifts across Alaska with elevation and distance from water. Enter your ZIP code for dates from your nearest weather station.
Alaska locations
| ZIP | Area | Hardiness zone |
|---|---|---|
| 99501 | Anchorage | - |
| 99502 | Anchorage | - |
| 99513 | Anchorage | - |
| 99516 | Anchorage | - |
| 99517 | Anchorage | - |
| 99530 | Anchorage | - |
| 99606 | Newhalen | - |
| 99692 | Unalaska | - |
| 99723 | UtqiagÌvik | - |
| 99725 | Ester | - |
| 99736 | Deering | - |
| 99741 | Galena | - |
| 99748 | Kaltag | - |
| 99750 | Kivalina | - |
| 99775 | College | - |
| 99777 | Tanana | - |
| 99782 | Wainwright | - |
| 99789 | Nuiqsut | - |
| 99836 | Port Alexander | - |
| 99927 | Port Protection | - |
| 99504 | Anchorage | - |
| 99505 | Anchorage | - |
| 99506 | Anchorage | - |
| 99507 | Anchorage | - |
| 99508 | Anchorage | - |
| 99515 | Anchorage | - |
| 99518 | Anchorage | - |
| 99519 | Prudhoe Bay | - |
| 99540 | Anchorage | - |
| 99546 | Adak | - |
| 99550 | Port Lions | - |
| 99551 | Akiachak | - |
| 99552 | Akiak | - |
| 99556 | Nikolaevsk | - |
| 99559 | Bethel | - |
| 99566 | McCarthy | - |
| 99567 | Anchorage | - |
| 99568 | Funny River | - |
| 99571 | Cold Bay | - |
| 99572 | Cooper Landing | - |
| 99573 | Tonsina | - |
| 99574 | Anchorage | - |
| 99577 | Anchorage | - |
| 99587 | Anchorage | - |
| 99588 | Lake Louise | - |
| 99591 | St. George | - |
| 99603 | Halibut Cove | - |
| 99605 | Sunrise | - |
| 99609 | Kasigluk | - |
| 99610 | Cohoe | - |
| 99611 | Point Possession | - |
| 99612 | King Cove | - |
| 99621 | Kwethluk | - |
| 99623 | Point MacKenzie | - |
| 99631 | Moose Pass | - |
| 99633 | Naknek | - |
| 99634 | Napakiak | - |
| 99639 | Ninilchik | - |
| 99641 | Nunapitchuk | - |
| 99644 | Ouzinkie | - |
Source: NOAA 1991–2020 U.S. Climate Normals (public domain) and USDA 2023 Plant Hardiness Zone Map. Page updated Aug 4, 2026.