Frost dates for Kitoi Bay, AK
At Kitoi Bay, the median last spring frost (32°F) is May 11 and the median first fall frost is Oct 6, for a typical growing season of 149 days. For a 90% chance that the last frost has passed, wait until May 28. Nearby ZIP codes are in USDA hardiness zones 6a to 7b.
- May 11Last spring frost (median)50% chance of 32°F after this date
- May 28Safer planting date10% chance of 32°F after this date
- Oct 6First fall frost (median)50% chance of 32°F by this date
- 149 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 | May 14 | May 31 | Jun 12 |
| 32°F | Apr 25 | May 11 | May 28 |
| 28°F | Apr 7 | Apr 23 | May 9 |
| 24°F | Mar 24 | Apr 6 | Apr 22 |
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 10 | Sep 24 | Oct 6 |
| 32°F | Sep 25 | Oct 6 | Oct 24 |
| 28°F | Oct 4 | Oct 20 | Nov 10 |
| 24°F | Oct 15 | Nov 4 | Nov 25 |
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 | 94 days | 116 days | 136 days |
| 32°F | 125 days | 149 days | 172 days |
| 28°F | 158 days | 181 days | 204 days |
| 24°F | 184 days | 209 days | 233 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 |
|---|---|---|---|
| 99644 | 7b | 5 to 10°F | 31 km |
| 99550 | 7a | 0 to 5°F | 46 km |
| 99615 | 7a | 0 to 5°F | 82 km |
| 99624 | 7b | 5 to 10°F | 117 km |
| 99643 | 7b | 5 to 10°F | 122 km |
| 99608 | 7a | 0 to 5°F | 135 km |
| 99663 | 6b | -5 to 0°F | 141 km |
| 99603 | 6a | -10 to -5°F | 165 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 USC00504812, at 58.1914, -152.3722, elevation 18 m (60 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 149.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Ouzinkie (31 km)
- Monashka Creek Dam (39 km)
- Kodiak Wastewater Plant (43 km)
- Kodiak Airport (49 km)
- Seldovia Airport (144 km)
- Homer Airport (169 km)
- Homer 8 NW (178 km)
- Homer 9 E (180 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.