Frost dates for 99721Anaktuvuk Pass, AK
Frost is possible in any month near Anaktuvuk Pass, based on NOAA 1991-2020 records for the Toolik Lake 5 Ene, AK station.
Frost is possible in any month. Even summer nights can drop to freezing at this station, so protect tender plants whenever cold nights are forecast.
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | — | — | 24 days | 100% |
| Frost / freeze (32°F) | — | — | 47 days | 100% |
| Hard freeze (28°F) | — | — | 75 days | 100% |
Where these dates come from
ZIP code 99721 is matched to the NOAA station Toolik Lake 5 Ene, AK, 110.9 km away, at 2,461 ft elevation (332 ft higher than the ZIP code's center). This station is relatively far away, so local dates may differ more than usual. Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Toolik Lake 5 Ene, AK (used) | 2,461 ft | — | — |
| Chandalar Shelf Dot, AK | 3,250 ft | — | — |
| Wiseman, AK | 1,181 ft | — | — |
| Bettles Ap, AK | 642 ft | May 22 | Aug 24 |
Frequently asked questions
- When is the last frost in Anaktuvuk Pass, AK?
- Frost is possible in any month at the nearest NOAA station (Toolik Lake 5 Ene, AK), so there is no reliable average last frost date.
- When is the first frost in Anaktuvuk Pass, AK?
- Frost is possible in any month at the nearest NOAA station.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.