Frost dates for 91913 — Chula Vista, CA
Frost is light and occasional here — typically a few cold nights around midwinter (about 1 a year). Cover tender plants when frost is forecast.
How Chula Vista compares
- In a typical year, frost nights in Chula Vista fall between December 31 and January 6. In 1 year in 10 the first frost comes as early as December 11, or the last frost as late as February 5.
- Nearby San Diego, CA, 19 km away, rarely gets frost, a reminder of how much elevation and distance from the coast matter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 13 |
| 50% (median) | January 6 |
| 10% (safe for tender plants) | February 5 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | December 11 |
| 50% (median) | December 31 |
| 90% (late) | January 30 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Gardening where frost is rare
Chula Vista, CA only freezes on a few winter nights, 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 San Diego Brown Fld, CA weather station, 9 km away (elevation 515 ft (157 m)).
ZIP codes in Chula Vista: 91909 91910 91911 91912 91913 91914 91915 91921
Frost dates near Chula Vista
- Bonita rare frost
- Spring Valley Jan 6 · Dec 21
- Lemon Grove Jan 6 · Dec 21
- National City rare frost
- San Ysidro (San Diego) Jan 6 · Dec 31
- La Mesa Jan 6 · Dec 21
- Imperial Beach rare frost
- Jamul Jan 6 · Dec 21
Frequently asked questions
When is the last frost in Chula Vista, CA?
The median last spring frost in Chula Vista, CA is January 6. There is still about a 10% chance of frost after February 5, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Chula Vista, CA?
The median first fall frost is December 31, with about a 10% chance of frost before December 11.
How long is the growing season in Chula Vista, CA?
About 359 days between the median last spring frost and first fall frost.
What planting zone is Chula Vista, CA?
Chula Vista, CA is in USDA hardiness zone 10b.