Frost dates for 91921 — Chula Vista, CA
Last spring frostRaremost years have none
First fall frostRaremost years have none
Hardiness zone10bZone 10b
Gardening where frost is rare
Chula Vista, CA rarely or never drops to freezing, so the usual "plant after the last frost" rule doesn't apply. Heat and rainfall decide the seasons instead:
- Cool-season crops (lettuce, broccoli, peas, carrots) grow best from fall through late winter.
- Warm-season crops (tomatoes, peppers, beans, squash) do best planted in late winter to spring, and again in late summer for a fall crop — midsummer heat can stop tomatoes setting fruit.
- Heat lovers (okra, sweet potatoes, melons) can be planted through spring and early summer.
About these dates
Based on 1991–2020 NOAA climate normals for the Chula Vista, CA weather station, about 1 km away (elevation 56 ft (17 m)).
ZIP codes in Chula Vista: 91909 91910 91911 91912 91913 91914 91915 91921
Frost dates near Chula Vista
- National City rare frost
- Bonita rare frost
- Imperial Beach rare frost
- San Ysidro (San Diego) Jan 6 · Dec 31
- Coronado rare frost
- Lemon Grove Jan 6 · Dec 21
- Spring Valley Jan 6 · Dec 21
- San Diego rare frost
Frequently asked questions
When is the last frost in Chula Vista, CA?
In most years Chula Vista, CA has no frost at all. The nearest NOAA station averages 0 nights a year at or below 32°F — too few to calculate a typical frost date.