Frost dates for 92690 — Mission Viejo, CA
Last spring frostRaremost years have none
First fall frostRaremost years have none
Hardiness zone10bZone 10b
Gardening where frost is rare
Mission Viejo, 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 Mission Viejo compares
- Nearby Irvine, CA, 16 km away, gets only light, occasional frost, a reminder of how much elevation and distance from the coast matter.
About these dates
Based on 1991–2020 NOAA climate normals for the Irvine Rch, CA weather station, 14 km away (elevation 541 ft (165 m)).
ZIP codes in Mission Viejo: 92690 92691 92692
Frost dates near Mission Viejo
- El Toro Jan 5 · Dec 25
- Lake Forest Jan 5 · Dec 25
- Laguna Hills Jan 6 · Jan 2
- Rancho Santa Margarita rare frost
- Foothill Ranch rare frost
- Ladera Ranch Jan 6 · Jan 2
- Trabuco Canyon rare frost
- Laguna Woods Jan 6 · Jan 2
Frequently asked questions
When is the last frost in Mission Viejo, CA?
In most years Mission Viejo, CA has no frost at all. The nearest NOAA station averages 1 nights a year at or below 32°F — too few to calculate a typical frost date.