Frost dates for 92781 — Tustin, CA
Last spring frostRaremost years have none
First fall frostRaremost years have none
Hardiness zone10aZone 10a
Gardening where frost is rare
Tustin, 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.
How Tustin compares
- Tustin shares its weather station with Santa Ana, CA, 5 km away, so the two have the same frost dates.
About these dates
Based on 1991–2020 NOAA climate normals for the Santa Ana Fire Stn, CA weather station, 5 km away (elevation 135 ft (41 m)).
ZIP codes in Tustin: 92780 92781 92782
Frost dates near Tustin
- Santa Ana rare frost
- Irvine Jan 5 · Dec 25
- Orange rare frost
- East Irvine Jan 5 · Dec 25
- Villa Park rare frost
- Fountain Valley rare frost
- Costa Mesa rare frost
- Anaheim rare frost
Frequently asked questions
When is the last frost in Tustin, CA?
In most years Tustin, 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.