When is the last frost in Chula Vista, CA?

Frost occurs in about 25% of years at the nearest NOAA station (San Diego Brown Fld, CA), so there is no reliable average last frost date.

When is the first frost in Chula Vista, CA?

Frost occurs in about 25% of years 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 91913Chula Vista, CA

Frost occurs in about 25% of years near Chula Vista, based on NOAA 1991-2020 records for the San Diego Brown Fld, CA station.

Frost occurs in about 25% of years. Frost-tender plants can usually grow year-round, but cover them if a rare cold snap is 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)	Dec 29 · Feb 2 · Mar 7	Dec 1 · Dec 20 · Jan 25	326 days	91%
Frost / freeze (32°F)	Dec 13 · Jan 6 · Feb 5	Dec 11 · Dec 31 · Jan 30	365 days	25%
Hard freeze (28°F)	—	—	365 days	1%

Where these dates come from

ZIP code 91913 is matched to the NOAA station San Diego Brown Fld, CA, 8.8 km away, at 515 ft elevation (26 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
San Diego Brown Fld, CA (used)	515 ft	Jan 6	Dec 31
Chula Vista, CA	56 ft	—	—
Imperial Beach Ream Fld Nas, CA	24 ft	—	—
El Cajon, CA	495 ft	Jan 6	Dec 21

Frost dates near Chula Vista

Chula Vista, CA 91914 · last Jan 6, first Dec 31
Bonita, CA 91902 · last —, first —
San Diego, CA 92139 · last —, first —
Spring Valley, CA 91977 · last Jan 6, first Dec 21
National City, CA 91950 · last —, first —
Lemon Grove, CA 91945 · last —, first —
San Ysidro, CA 92173 · last —, first —
La Mesa, CA 91941 · last Jan 6, first Dec 21

Frequently asked questions

When is the last frost in Chula Vista, CA?: Frost occurs in about 25% of years at the nearest NOAA station (San Diego Brown Fld, CA), so there is no reliable average last frost date.
When is the first frost in Chula Vista, CA?: Frost occurs in about 25% of years 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.