When is the last frost in McCall, ID?

For ZIP code 83638, the average last spring frost (32°F) is June 22, based on NOAA 1991-2020 climate normals for the Mccall, ID weather station. There is a 1-in-10 chance of a frost after July 10.

When is the first frost in McCall, ID?

The average first fall frost (32°F) is September 2. There is a 1-in-10 chance of frost by August 14, so tender plants are at risk from that point on.

How long is the growing season in 83638?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 72 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 83638McCall, ID

The average last spring frost in McCall is June 22 and the average first fall frost is September 2, giving a typical growing season of about 72 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jun 22
Average first fall frost: Sep 2
Growing season: 72 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)	—	—	44 days	100%
Frost / freeze (32°F)	Jun 3 · Jun 22 · Jul 10	Aug 14 · Sep 2 · Sep 18	72 days	100%
Hard freeze (28°F)	May 12 · Jun 3 · Jun 23	Aug 30 · Sep 15 · Oct 2	103 days	100%

Where these dates come from

ZIP code 83638 is matched to the NOAA station Mccall, ID, 2.1 km away, at 5,025 ft elevation (93 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Mccall, ID (used)	5,025 ft	Jun 22	Sep 2
Mccall Ap, ID	5,013 ft	Jun 10	Sep 10
New Meadows Rs, ID	3,862 ft	—	—
Council, ID	2,943 ft	May 10	Oct 2

Frost dates near McCall

Lake Fork, ID 83635 · last Jun 10, first Sep 10
New Meadows, ID 83654 · last —, first —
Donnelly, ID 83615 · last May 30, first Sep 19
Council, ID 83612 · last May 10, first Oct 2
Cascade, ID 83611 · last —, first —
Mesa, ID 83643 · last May 10, first Oct 2
Yellow Pine, ID 83677 · last Jun 12, first Sep 11
Indian Valley, ID 83632 · last May 15, first Sep 27

Frequently asked questions

When is the last frost in McCall, ID?: For ZIP code 83638, the average last spring frost (32°F) is June 22, based on NOAA 1991-2020 climate normals for the Mccall, ID weather station. There is a 1-in-10 chance of a frost after July 10.
When is the first frost in McCall, ID?: The average first fall frost (32°F) is September 2. There is a 1-in-10 chance of frost by August 14, so tender plants are at risk from that point on.
How long is the growing season in 83638?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 72 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.