Whitethorn, CA frost dates
Last spring frostRaremost years have none
First fall frostRaremost years have none
Hardiness zone9bZone 9b
Gardening where frost is rare
Whitethorn, 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 Shelter Cove Aviation, CA weather station, 5 km away (elevation 246 ft (75 m)).
Frost dates near Whitethorn
- Redway Mar 10 · Dec 1
- Garberville Mar 10 · Dec 1
- Piercy Mar 10 · Dec 1
- Honeydew rare frost
- Phillipsville Mar 10 · Dec 1
- Miranda Mar 10 · Dec 1
- Weott Mar 4 · Nov 22
- Petrolia Feb 1 · Dec 19
- Myers Flat Mar 4 · Nov 22
- Leggett Mar 10 · Dec 1
Frequently asked questions
When is the last frost in Whitethorn, CA?
In most years Whitethorn, 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.