Frost dates for 91945 — Lemon Grove, CA
Last spring frostRaremost years have none
First fall frostRaremost years have none
Hardiness zone10bZone 10b
Gardening where frost is rare
Lemon Grove, 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 Lemon Grove compares
- Nearby La Mesa, CA, 4 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 Chula Vista, CA weather station, 11 km away (elevation 56 ft (17 m)).
ZIP codes in Lemon Grove: 91945 91946
Frost dates near Lemon Grove
- Spring Valley Jan 6 · Dec 21
- La Mesa Jan 6 · Dec 21
- Bonita rare frost
- National City rare frost
- Chula Vista rare frost
- San Diego rare frost
- El Cajon Jan 6 · Dec 21
- Santee Jan 6 · Dec 21
Frequently asked questions
When is the last frost in Lemon Grove, CA?
In most years Lemon Grove, 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.