Dulzura, CA frost dates
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 Dulzura compares
- In a typical year, frost nights in Dulzura 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.
- Compared with El Cajon, CA, 28 km away, the last frost here is the same as there.
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
Dulzura, 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, 24 km away (elevation 515 ft (157 m)).
Frost dates near Dulzura
- Tecate Apr 30 · Oct 26
- Potrero Apr 30 · Oct 26
- Jamul Jan 6 · Dec 21
- Campo Apr 30 · Oct 26
- Alpine Feb 12 · Dec 24
- Spring Valley Jan 6 · Dec 21
- El Cajon Jan 6 · Dec 21
- Bonita rare frost
- Chula Vista rare frost
- San Ysidro (San Diego) Jan 6 · Dec 31
Frequently asked questions
When is the last frost in Dulzura, CA?
The median last spring frost in Dulzura, 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 Dulzura, 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 Dulzura, CA?
About 359 days between the median last spring frost and first fall frost.
What planting zone is Dulzura, CA?
Dulzura, CA is in USDA hardiness zone 10a.