Stevenson Ranch, 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 Stevenson Ranch compares
- In a typical year, frost nights in Stevenson Ranch fall between January 1 and January 8. In 1 year in 10 the first frost comes as early as November 30, or the last frost as late as March 10.
- Stevenson Ranch shares its weather station with Valencia, CA, 7 km away, so the two have the same frost dates.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 8 |
| 50% (median) | January 8 |
| 10% (safe for tender plants) | March 10 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 30 |
| 50% (median) | January 1 |
| 90% (late) | February 25 |
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
Stevenson Ranch, 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 Newhall 5nw, CA weather station, 3 km away (elevation 1,765 ft (538 m)).
Frost dates near Stevenson Ranch
- Valencia Jan 8 · Jan 1
- Newhall Jan 8 · Jan 1
- Santa Clarita Jan 8 · Jan 1
- Castaic Jan 8 · Jan 1
- Porter Ranch Jan 2 · Jan 1
- Chatsworth Jan 2 · Jan 1
- Granada Hills Jan 2 · Jan 1
- Canyon Country Jan 8 · Jan 1
- Brandeis Jan 24 · Dec 15
- Piru Jan 8 · Jan 1
Frequently asked questions
When is the last frost in Stevenson Ranch, CA?
The median last spring frost in Stevenson Ranch, CA is January 8. There is still about a 10% chance of frost after March 10, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Stevenson Ranch, CA?
The median first fall frost is January 1, with about a 10% chance of frost before November 30.
How long is the growing season in Stevenson Ranch, CA?
About 358 days between the median last spring frost and first fall frost.
What planting zone is Stevenson Ranch, CA?
Stevenson Ranch, CA is in USDA hardiness zone 10a.