When is the last frost in La Barge, WY?

For ZIP code 83123, the average last spring frost (32°F) is June 9, based on NOAA 1991-2020 climate normals for the La Barge, WY weather station. There is a 1-in-10 chance of a frost after June 27.

When is the first frost in La Barge, WY?

The average first fall frost (32°F) is September 4. There is a 1-in-10 chance of frost by August 21, so tender plants are at risk from that point on.

How long is the growing season in 83123?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 84 days long.

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 83123La Barge, WY

The average last spring frost in La Barge is June 9 and the average first fall frost is September 4, giving a typical growing season of about 84 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jun 9
Average first fall frost: Sep 4
Growing season: 84 days

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)	—	—	57 days	100%
Frost / freeze (32°F)	May 24 · Jun 9 · Jun 27	Aug 21 · Sep 4 · Sep 18	84 days	100%
Hard freeze (28°F)	May 9 · May 24 · Jun 11	Sep 1 · Sep 15 · Sep 30	111 days	100%

Where these dates come from

ZIP code 83123 is matched to the NOAA station La Barge, WY, 2.3 km away, at 6,598 ft elevation (42 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
La Barge, WY (used)	6,598 ft	Jun 9	Sep 4
Fontenelle Dam, WY	6,485 ft	—	—
Big Piney Marbleton Ap, WY	6,970 ft	—	—
Kemmerer 2N, WY	6,937 ft	—	—

Frost dates near La Barge

Big Piney, WY 83113 · last —, first —
Opal, WY 83124 · last —, first —
Frontier, WY 83121 · last —, first —
Kemmerer, WY 83101 · last —, first —
Diamondville, WY 83116 · last —, first —
Cokeville, WY 83114 · last —, first —
Farson, WY 82932 · last —, first —
Geneva, ID 83238 · last Jun 17, first Sep 3

Frequently asked questions

When is the last frost in La Barge, WY?: For ZIP code 83123, the average last spring frost (32°F) is June 9, based on NOAA 1991-2020 climate normals for the La Barge, WY weather station. There is a 1-in-10 chance of a frost after June 27.
When is the first frost in La Barge, WY?: The average first fall frost (32°F) is September 4. There is a 1-in-10 chance of frost by August 21, so tender plants are at risk from that point on.
How long is the growing season in 83123?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 84 days long.
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.