Frost dates for 91933 — Imperial Beach, CA
Last spring frostRaremost years have none
First fall frostRaremost years have none
Hardiness zone10bZone 10b
Gardening where frost is rare
Imperial Beach, 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 Imperial Beach Ream Fld Nas, CA weather station, 2 km away (elevation 23 ft (7 m)).
ZIP codes in Imperial Beach: 91932 91933
Frost dates near Imperial Beach
- San Ysidro (San Diego) Jan 6 · Dec 31
- Chula Vista rare frost
- National City rare frost
- Bonita rare frost
- Coronado rare frost
- Lemon Grove Jan 6 · Dec 21
- San Diego rare frost
- Spring Valley Jan 6 · Dec 21
Frequently asked questions
When is the last frost in Imperial Beach, CA?
In most years Imperial Beach, 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.