Frost dates for 94522 — Concord, CA
Frost is light and occasional here — typically a few cold nights around midwinter (about 9 a year). Cover tender plants when frost is forecast.
How Concord compares
- In a typical year, frost nights in Concord fall between December 14 and January 9. In 1 year in 10 the first frost comes as early as November 28, or the last frost as late as February 12.
- Nearby Oakland, CA, 27 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 16 |
| 50% (median) | January 9 |
| 10% (safe for tender plants) | February 12 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 28 |
| 50% (median) | December 14 |
| 90% (late) | January 16 |
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
Concord, 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 Concord Buchanan Fld, CA weather station, 3 km away (elevation 20 ft (6 m)).
ZIP codes in Concord: 94518 94519 94520 94521 94522 94524 94527 94529
Frost dates near Concord
- Pleasant Hill Jan 7 · Dec 19
- Walnut Creek Jan 7 · Dec 19
- Martinez Feb 28 · Nov 22
- Pittsburg Jan 9 · Dec 14
- Lafayette Jan 7 · Dec 19
- Clayton Mar 8 · Dec 22
- Alamo Mar 8 · Dec 22
- Benicia Jan 17 · Dec 27
Frequently asked questions
When is the last frost in Concord, CA?
The median last spring frost in Concord, CA is January 9. There is still about a 10% chance of frost after February 12, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Concord, CA?
The median first fall frost is December 14, with about a 10% chance of frost before November 28.
How long is the growing season in Concord, CA?
About 339 days between the median last spring frost and first fall frost.
What planting zone is Concord, CA?
Concord, CA is in USDA hardiness zone 9b.