When is the last frost in Trabuco Canyon, CA?

For ZIP code 92679, the average last spring frost (32°F) is January 28, based on NOAA 1991-2020 climate normals for the Elsinore, CA weather station. There is a 1-in-10 chance of a frost after February 27.

When is the first frost in Trabuco Canyon, CA?

The average first fall frost (32°F) is December 18. There is a 1-in-10 chance of frost by December 1, so tender plants are at risk from that point on.

How long is the growing season in 92679?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 329 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 92679Trabuco Canyon, CA

The average last spring frost in Trabuco Canyon is January 28 and the average first fall frost is December 18, giving a typical growing season of about 329 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 28
Average first fall frost: Dec 18
Growing season: 329 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)	Jan 29 · Feb 28 · Apr 2	Nov 15 · Dec 2 · Dec 18	274 days	100%
Frost / freeze (32°F)	Dec 24 · Jan 28 · Feb 27	Dec 1 · Dec 18 · Jan 24	329 days	91%
Hard freeze (28°F)	Dec 12 · Jan 1 · Feb 9	Dec 9 · Dec 27 · Feb 3	365 days	38%

Where these dates come from

ZIP code 92679 is matched to the NOAA station Elsinore, CA, 22.8 km away, at 1,268 ft elevation (228 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Elsinore, CA (used)	1,268 ft	Jan 28	Dec 18
Irvine Rch, CA	540 ft	—	—
Tustin Irvine Rch, CA	235 ft	Jan 5	Dec 25
Laguna Beach, CA	44 ft	Jan 6	Jan 2

Frost dates near Trabuco Canyon

Trabuco Canyon, CA 92678 · last Jan 28, first Dec 18
Rancho Santa Margarita, CA 92688 · last Jan 28, first Dec 18
Foothill Ranch, CA 92610 · last —, first —
Mission Viejo, CA 92692 · last —, first —
Lake Forest, CA 92630 · last —, first —
Silverado, CA 92676 · last Jan 28, first Dec 18
El Toro, CA 92609 · last —, first —
Irvine, CA 92618 · last —, first —

Frequently asked questions

When is the last frost in Trabuco Canyon, CA?: For ZIP code 92679, the average last spring frost (32°F) is January 28, based on NOAA 1991-2020 climate normals for the Elsinore, CA weather station. There is a 1-in-10 chance of a frost after February 27.
When is the first frost in Trabuco Canyon, CA?: The average first fall frost (32°F) is December 18. There is a 1-in-10 chance of frost by December 1, so tender plants are at risk from that point on.
How long is the growing season in 92679?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 329 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.