Frost dates for 91362 — Thousand Oaks, CA
Frost is light and occasional here — typically a few cold nights around midwinter (about 11 a year). Cover tender plants when frost is forecast.
How Thousand Oaks compares
- In a typical year, frost nights in Thousand Oaks fall between December 15 and January 24. In 1 year in 10 the first frost comes as early as November 27, or the last frost as late as March 5.
- Nearby Oxnard, CA, 32 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 21 |
| 50% (median) | January 24 |
| 10% (safe for tender plants) | March 5 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 27 |
| 50% (median) | December 15 |
| 90% (late) | January 26 |
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
Thousand Oaks, 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 Woodland Hills Pierce College, CA weather station, 23 km away (elevation 791 ft (241 m)).
ZIP codes in Thousand Oaks: 91358 91360 91362
Frost dates near Thousand Oaks
- Oak Park Jan 24 · Dec 15
- Westlake Village Jan 24 · Dec 15
- Agoura Hills Jan 24 · Dec 15
- Newbury Park Dec 31 · Dec 28
- Simi Valley Jan 24 · Dec 15
- Moorpark Dec 31 · Dec 28
- Brandeis Jan 24 · Dec 15
- Calabasas Jan 24 · Dec 15
Frequently asked questions
When is the last frost in Thousand Oaks, CA?
The median last spring frost in Thousand Oaks, CA is January 24. There is still about a 10% chance of frost after March 5, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Thousand Oaks, CA?
The median first fall frost is December 15, with about a 10% chance of frost before November 27.
How long is the growing season in Thousand Oaks, CA?
About 325 days between the median last spring frost and first fall frost.
What planting zone is Thousand Oaks, CA?
Thousand Oaks, CA is in USDA hardiness zone 10b.