When is the last frost in Wasco, CA?

For ZIP code 93280, the average last spring frost (32°F) is January 31, based on NOAA 1991-2020 climate normals for the Wasco, CA weather station. There is a 1-in-10 chance of a frost after February 27.

When is the first frost in Wasco, CA?

The average first fall frost (32°F) is December 5. There is a 1-in-10 chance of frost by November 21, so tender plants are at risk from that point on.

How long is the growing season in 93280?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 315 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 93280Wasco, CA

The average last spring frost in Wasco is January 31 and the average first fall frost is December 5, giving a typical growing season of about 315 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 31
Average first fall frost: Dec 5
Growing season: 315 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 30 · Feb 26 · Mar 25	Nov 9 · Nov 24 · Dec 10	271 days	100%
Frost / freeze (32°F)	Jan 2 · Jan 31 · Feb 27	Nov 21 · Dec 5 · Jan 2	315 days	97%
Hard freeze (28°F)	Dec 8 · Jan 4 · Feb 4	Nov 29 · Dec 16 · Jan 16	352 days	65%

Where these dates come from

ZIP code 93280 is matched to the NOAA station Wasco, CA, 10.9 km away, at 291 ft elevation (45 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Wasco, CA (used)	291 ft	Jan 31	Dec 5
Delano, CA	302 ft	Jan 31	Dec 8
Buttonwillow, CA	225 ft	Feb 9	Nov 26
Shafter 6E, CA	404 ft	Feb 20	Nov 23

Frost dates near Wasco

Mc Farland, CA 93250 · last Jan 31, first Dec 5
Lost Hills, CA 93249 · last Jan 31, first Dec 5
Delano, CA 93216 · last Jan 31, first Dec 8
Shafter, CA 93263 · last Jan 31, first Dec 5
Alpaugh, CA 93201 · last Feb 15, first Nov 27
Buttonwillow, CA 93206 · last Feb 9, first Nov 26
Earlimart, CA 93219 · last Jan 31, first Dec 8
Richgrove, CA 93261 · last Jan 31, first Dec 8

Frequently asked questions

When is the last frost in Wasco, CA?: For ZIP code 93280, the average last spring frost (32°F) is January 31, based on NOAA 1991-2020 climate normals for the Wasco, CA weather station. There is a 1-in-10 chance of a frost after February 27.
When is the first frost in Wasco, CA?: The average first fall frost (32°F) is December 5. There is a 1-in-10 chance of frost by November 21, so tender plants are at risk from that point on.
How long is the growing season in 93280?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 315 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.