La Canada Flintridge, CA frost dates
Frost is light and occasional here — typically a few cold nights around midwinter (about 0 a year). Cover tender plants when frost is forecast.
How La Canada Flintridge compares
- In a typical year, frost nights in La Canada Flintridge fall between January 7 and January 8. In 1 year in 10 the first frost comes as early as December 20, or the last frost as late as February 17.
- Compared with Glendale, CA, 8 km away, the last frost here is 6 days later than there.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 20 |
| 50% (median) | January 8 |
| 10% (safe for tender plants) | February 17 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | December 20 |
| 50% (median) | January 7 |
| 90% (late) | February 14 |
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
La Canada Flintridge, 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 Pasadena, CA weather station, 8 km away (elevation 863 ft (263 m)).
ZIP codes in La Canada Flintridge: 91011 91012
Frost dates near La Canada Flintridge
- Montrose Jan 8 · Jan 7
- Verdugo City Jan 2 · Dec 26
- La Crescenta Jan 2 · Dec 26
- Altadena Jan 8 · Jan 7
- Glendale Jan 2 · Dec 26
- Pasadena Jan 8 · Jan 7
- Tujunga Dec 31 · Dec 28
- Burbank Jan 2 · Dec 26
- South Pasadena Jan 8 · Jan 7
- Mount Wilson Apr 28 · Nov 15
Frequently asked questions
When is the last frost in La Canada Flintridge, CA?
The median last spring frost in La Canada Flintridge, CA is January 8. There is still about a 10% chance of frost after February 17, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in La Canada Flintridge, CA?
The median first fall frost is January 7, with about a 10% chance of frost before December 20.
How long is the growing season in La Canada Flintridge, CA?
About 364 days between the median last spring frost and first fall frost.
What planting zone is La Canada Flintridge, CA?
La Canada Flintridge, CA is in USDA hardiness zone 10a.