When is the last frost in Dubois, WY?

Frost is possible in any month at the nearest NOAA station (Dubois, WY), so there is no reliable average last frost date.

When is the first frost in Dubois, WY?

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 82513Dubois, WY

Frost is possible in any month near Dubois, based on NOAA 1991-2020 records for the Dubois, WY 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)	—	—	42 days	100%
Frost / freeze (32°F)	—	—	74 days	100%
Hard freeze (28°F)	May 11 · May 25 · Jun 15	Sep 1 · Sep 16 · Oct 1	112 days	100%

Where these dates come from

ZIP code 82513 is matched to the NOAA station Dubois, WY, 0.8 km away, at 6,955 ft elevation (338 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Dubois, WY (used)	6,955 ft	—	—
Burris, WY	6,125 ft	Jun 1	Sep 14
Darwin Rch, WY	8,190 ft	—	—
Diversion Dam, WY	5,578 ft	May 21	Sep 20

Frost dates near Dubois

Crowheart, WY 82512 · last Jun 1, first Sep 14
Cora, WY 82925 · last —, first —
Kinnear, WY 82516 · last May 21, first Sep 20
Bondurant, WY 82922 · last —, first —
Kelly, WY 83011 · last —, first —
Pinedale, WY 82941 · last —, first —
Pavillion, WY 82523 · last May 14, first Sep 30
Daniel, WY 83115 · last —, first —

Frequently asked questions

When is the last frost in Dubois, WY?: Frost is possible in any month at the nearest NOAA station (Dubois, WY), so there is no reliable average last frost date.
When is the first frost in Dubois, WY?: 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.