Frost dates for Haines Airport, AK
At Haines Airport, the median last spring frost (32°F) is Apr 25 and the median first fall frost is Oct 12, for a typical growing season of 172 days. For a 90% chance that the last frost has passed, wait until May 7. Nearby ZIP codes are in USDA hardiness zones 5a to 7a.
- Apr 25Last spring frost (median)50% chance of 32°F after this date
- May 7Safer planting date10% chance of 32°F after this date
- Oct 12First fall frost (median)50% chance of 32°F by this date
- 172 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 28 | May 9 | May 22 |
| 32°F | Apr 10 | Apr 25 | May 7 |
| 28°F | Mar 26 | Apr 7 | Apr 22 |
| 24°F | Mar 11 | Mar 29 | Apr 9 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Sep 17 | Sep 30 | Oct 13 |
| 32°F | Sep 30 | Oct 12 | Oct 29 |
| 28°F | Oct 11 | Oct 29 | Nov 13 |
| 24°F | Oct 27 | Nov 8 | Nov 24 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 125 days | 143 days | 161 days |
| 32°F | 152 days | 172 days | 192 days |
| 28°F | 183 days | 203 days | 223 days |
| 24°F | 205 days | 224 days | 247 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 99840 | 5a | -20 to -15°F | 37 km |
| 99827 | 5b | -15 to -10°F | 62 km |
| 99850 | 7a | 0 to 5°F | 84 km |
| 99826 | 7a | 0 to 5°F | 94 km |
| 99801 | 6a | -10 to -5°F | 123 km |
| 99824 | 7a | 0 to 5°F | 126 km |
| 99829 | 7a | 0 to 5°F | 136 km |
| 99825 | 7a | 0 to 5°F | 136 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USW00025323, at 59.2433, -135.5094, elevation 5 m (15 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 134.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Haines #2 (3 km)
- Skagway Airport (26 km)
- Skagway (26 km)
- Haines 40nw (54 km)
- Glacier Bay (90 km)
- Gustavus 2 NE (91 km)
- Gustavus (93 km)
- Juneau Mile 17 (103 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.