When is the last frost in Bettles Field, AK?

Frost is possible in any month at the nearest NOAA station (Manley Hot Springs 15Ne, AK), so there is no reliable average last frost date.

When is the first frost in Bettles Field, 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.

Frost dates for 99726Bettles Field, AK

Frost is possible in any month near Bettles Field, based on NOAA 1991-2020 records for the Manley Hot Springs 15Ne, 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.

Spring dates: chance of a frost AFTER the date. Fall dates: chance of a frost BEFORE the date.
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)	—	—	51 days	100%
Frost / freeze (32°F)	—	—	80 days	100%
Hard freeze (28°F)	May 9 · May 24 · Jun 10	Aug 26 · Sep 5 · Sep 17	104 days	100%

Where these dates come from

ZIP code 99726 is matched to the NOAA station Manley Hot Springs 15Ne, AK, 39 km away, at 501 ft elevation (1,100 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Manley Hot Springs 15Ne, AK (used)	501 ft	—	—
Tanana Calhoun Mem Ap, AK	227 ft	May 29	Aug 28
Nenana Muni Ap, AK	360 ft	May 15	Sep 11
Keystone Ridge, AK	1,600 ft	May 15	Sep 16

Frost dates near Bettles Field

Manley Hot Springs, AK 99756 · last —, first —
Tanana, AK 99777 · last May 29, first Aug 28
Rampart, AK 99767 · last —, first —

Frequently asked questions

When is the last frost in Bettles Field, AK?: Frost is possible in any month at the nearest NOAA station (Manley Hot Springs 15Ne, AK), so there is no reliable average last frost date.
When is the first frost in Bettles Field, 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.