When is the last frost in Farson, WY?

Frost is possible in any month at the nearest NOAA station (Farson 2Nne, WY), so there is no reliable average last frost date.

When is the first frost in Farson, 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 82932Farson, WY

Frost is possible in any month near Farson, based on NOAA 1991-2020 records for the Farson 2Nne, 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)	—	—	57 days	100%
Frost / freeze (32°F)	—	—	84 days	100%
Hard freeze (28°F)	May 12 · May 26 · Jun 10	Sep 2 · Sep 14 · Sep 26	109 days	100%

Where these dates come from

ZIP code 82932 is matched to the NOAA station Farson 2Nne, WY, 6.3 km away, at 6,620 ft elevation (3 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Farson 2Nne, WY (used)	6,620 ft	—	—
Fontenelle Dam, WY	6,485 ft	—	—
Rock Springs Fire Dept, WY	6,270 ft	May 24	Sep 24
Rock Springs Ap, WY	6,741 ft	May 22	Sep 28

Frost dates near Farson

Reliance, WY 82943 · last May 22, first Sep 28
Superior, WY 82945 · last May 22, first Sep 28
Rock Springs, WY 82901 · last May 24, first Sep 24
Green River, WY 82935 · last May 24, first Sep 22
La Barge, WY 83123 · last Jun 9, first Sep 4
Boulder, WY 82923 · last —, first —
Point Of Rocks, WY 82942 · last May 22, first Sep 28
Little America, WY 82929 · last May 24, first Sep 22

Frequently asked questions

When is the last frost in Farson, WY?: Frost is possible in any month at the nearest NOAA station (Farson 2Nne, WY), so there is no reliable average last frost date.
When is the first frost in Farson, 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.