When is the last frost in Driggs, ID?

For ZIP code 83422, the average last spring frost (32°F) is June 13, based on NOAA 1991-2020 climate normals for the Driggs, ID weather station. There is a 1-in-10 chance of a frost after June 28.

When is the first frost in Driggs, ID?

The average first fall frost (32°F) is September 9. There is a 1-in-10 chance of frost by August 26, so tender plants are at risk from that point on.

How long is the growing season in 83422?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 86 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 83422Driggs, ID

The average last spring frost in Driggs is June 13 and the average first fall frost is September 9, giving a typical growing season of about 86 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jun 13
Average first fall frost: Sep 9
Growing season: 86 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)	—	—	59 days	100%
Frost / freeze (32°F)	May 27 · Jun 13 · Jun 28	Aug 26 · Sep 9 · Sep 23	86 days	100%
Hard freeze (28°F)	May 5 · May 22 · Jun 11	Sep 4 · Sep 20 · Oct 4	118 days	100%

Where these dates come from

ZIP code 83422 is matched to the NOAA station Driggs, ID, 0.8 km away, at 6,120 ft elevation (28 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Driggs, ID (used)	6,120 ft	Jun 13	Sep 9
Alta 1 Nnw, WY	6,440 ft	Jun 14	Sep 11
Tetonia Exp Stn, ID	6,170 ft	Jun 15	Sep 7
Moose, WY	6,444 ft	Jun 20	Aug 31

Frost dates near Driggs

Tetonia, ID 83452 · last Jun 13, first Sep 9
Victor, ID 83455 · last Jun 13, first Sep 9
Felt, ID 83424 · last Jun 15, first Sep 7
Alta, WY 83414 · last —, first —
Teton Village, WY 83025 · last Jun 24, first Aug 28
Moose, WY 83012 · last —, first —
Wilson, WY 83014 · last —, first —
Swan Valley, ID 83449 · last —, first —

Frequently asked questions

When is the last frost in Driggs, ID?: For ZIP code 83422, the average last spring frost (32°F) is June 13, based on NOAA 1991-2020 climate normals for the Driggs, ID weather station. There is a 1-in-10 chance of a frost after June 28.
When is the first frost in Driggs, ID?: The average first fall frost (32°F) is September 9. There is a 1-in-10 chance of frost by August 26, so tender plants are at risk from that point on.
How long is the growing season in 83422?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 86 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.