Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 94519 (Concord, CA)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Concord Buchanan Fld, CA (2 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 79% of years (about 8 freezing night(s) a year on average). The dates below describe freeze timing for the station's record; in many years there may be no 32°F freeze at all.
- Average last spring frostJan 950% chance of a 32°F freeze after this date
- Average first fall frostDec 1450% chance of a 32°F freeze by this date
- Growing season (frost-free)343 daysmedian, 32°F threshold
- USDA hardiness zone9b25 to 30°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Freezes are uncommon here, so frost-based timing is rough. Local extension calendars for frost-free areas use months.
Soil temperature now
2-inch depth
No soil station with a fresh reading within 62 miles.
4-inch depth
No soil station with a fresh reading within 62 miles.
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 94519 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
No soil reading near this ZIP. Typical extension timing for your region: spring February to March; fall September to October.
Fertilizer window
Lawn region: California coastal and valleys. Timing only; always follow the product label.
- Bermudagrass (warm-season): Spring: Several weeks after the lawn is fully green (April–May) (about Feb 24 here, using green-up about 3–4 weeks after your average last frost); Summer: Every 4–6 weeks through mid-August (heaviest feeder of the group); Late: Light, low-nitrogen/high-potassium feeding about 4 weeks before first frost, or skip. Avoid: Heavy late-fall nitrogen (linked to spring dead spot).
- Tall fescue (cool-season): Early fall: September (main feeding); Late fall: November, while still green; Late winter: Optional light feeding February–March. Avoid: Feeding after mid-spring and through summer in the transition zone (stress and brown patch).
Plant now
- Lettuce: fall sowing Oct 5–Nov 2
- Kale: fall transplant Sep 21–Oct 19
- Collards: fall transplant Sep 21–Oct 19
- Brussels sprouts: start seeds indoors Oct 17–31
- Kohlrabi: fall sowing Oct 5–19
- Swiss chard: fall sowing Oct 5–19
- Beet: fall sowing Oct 5–19
- Turnip: fall sowing Oct 5–19
- Onion (bulbing): start seeds indoors Oct 17–31
- Green onion / scallion: fall sowing Oct 5–19
- Leek: start seeds indoors Oct 17–31
- Celery: start seeds indoors Oct 17–31
- Strawberry (plants): fall transplant Oct 5–Nov 2
Coming up in the next 3 weeks
- Pepper (sweet and hot): start seeds indoors Oct 31–Nov 14
- Eggplant: start seeds indoors Oct 31–Nov 14
- Lettuce: fall transplant Oct 19–Nov 9
- Spinach: fall sowing Oct 19–Nov 9
- Broccoli: start seeds indoors Oct 31–Nov 14
- Cabbage: start seeds indoors Oct 31–Nov 14
- Cauliflower: start seeds indoors Oct 31–Nov 14
- Bok choy / Asian greens: fall sowing Oct 19–Nov 2
- Arugula: fall sowing Oct 19–Nov 16
- Mustard greens: fall sowing Oct 19–Nov 2
- Radish: fall sowing Nov 2–16
- Garlic: fall sowing Nov 2–30
Prune now
No frost-timed pruning windows are open this week.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Dec 16 (prior Dec) |
| 50% (the "average" last frost) | Jan 9 |
| 10% (cautious: only 1 year in 10 freezes later) | Feb 12 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Nov 28 |
| 50% (the "average" first frost) | Dec 14 |
| 90% (late: most years have frozen by now) | Jan 16 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Feb 14 | Dec 1 |
| 32°F (freeze) | Jan 9 | Dec 14 |
| 28°F (hard freeze) | Dec 30 (prior Dec) | Dec 23 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 94519
Dates count from your average last spring frost (Jan 9) and first fall frost (Dec 14). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Nov 14–28 | Jan 16–30 (transplant) | Aug 17–Sep 14 (transplant) |
| Pepper (sweet and hot) | Oct 31–Nov 14 | Jan 23–Feb 6 (transplant) | Aug 24–Sep 14 (transplant) |
| Eggplant | Oct 31–Nov 14 | Jan 23–Feb 6 (transplant) | Aug 24–Sep 14 (transplant) |
| Tomatillo | Nov 14–28 | Jan 16–30 (transplant) | – |
| Lettuce | Nov 14–28 | Dec 19–Jan 9 (transplant) Dec 12–Jan 23 (sow outdoors) | Oct 19–Nov 9 (transplant) Oct 5–Nov 2 (sowing) |
| Spinach | – | Nov 28–Dec 19 (sow outdoors) | Oct 19–Nov 9 (sowing) |
| Kale | Nov 14–28 | Dec 12–26 (transplant) Dec 12–26 (sow outdoors) | Sep 21–Oct 19 (transplant) Sep 7–Oct 5 (sowing) |
| Collards | Nov 14–28 | Dec 12–Jan 9 (transplant) Dec 12–Jan 9 (sow outdoors) | Sep 21–Oct 19 (transplant) Sep 7–Oct 5 (sowing) |
| Broccoli | Oct 31–Nov 14 | Dec 12–26 (transplant) | Sep 7–Oct 5 (transplant) |
| Cabbage | Oct 31–Nov 14 | Dec 12–26 (transplant) | Sep 7–Oct 5 (transplant) |
| Cauliflower | Oct 31–Nov 14 | Dec 26–Jan 9 (transplant) | Sep 7–Oct 5 (transplant) |
| Brussels sprouts | Oct 17–31 | Dec 12–26 (transplant) | Aug 24–Sep 14 (transplant) |
| Kohlrabi | Nov 14–28 | Dec 12–26 (transplant) Dec 12–26 (sow outdoors) | Oct 5–19 (sowing) |
| Bok choy / Asian greens | – | Dec 12–26 (sow outdoors) | Oct 19–Nov 2 (sowing) |
| Arugula | – | Dec 12–Jan 9 (sow outdoors) | Oct 19–Nov 16 (sowing) |
| Mustard greens | – | Dec 12–Jan 2 (sow outdoors) | Oct 19–Nov 2 (sowing) |
| Swiss chard | Nov 28–Dec 12 | Dec 26–Jan 16 (transplant) Dec 26–Jan 23 (sow outdoors) | Oct 5–19 (sowing) |
| Beet | – | Dec 12–Jan 9 (sow outdoors) | Oct 5–19 (sowing) |
| Carrot | – | Dec 19–Jan 16 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Radish | – | Dec 5–Jan 16 (sow outdoors) | Nov 2–16 (sowing) |
| Turnip | – | Dec 12–Jan 2 (sow outdoors) | Oct 5–19 (sowing) |
| Parsnip | – | Dec 19–Jan 9 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Nov 14–Dec 12 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Onion (bulbing) | Oct 17–31 | Nov 28–Dec 12 (transplant) | – |
| Green onion / scallion | – | Nov 28–Dec 26 (sow outdoors) | Oct 5–19 (sowing) |
| Leek | Oct 17–31 | Dec 12–26 (transplant) | – |
| Garlic | – | – | Nov 2–30 (sowing) |
| Shallot | – | Nov 28–Dec 12 (transplant) | Nov 2–30 (sowing) |
| Potato | – | Dec 12–26 (transplant) | Aug 24–Sep 7 (transplant) |
| Sweet potato | – | Jan 30–Feb 13 (transplant) | – |
| Sweet corn | – | Jan 16–30 (sow outdoors) | – |
| Bean, bush (snap) | – | Jan 16–30 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Bean, pole | – | Jan 16–30 (sow outdoors) | – |
| Lima bean | – | Jan 23–Feb 6 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jan 30–Feb 20 (sow outdoors) | – |
| Cucumber | Dec 12–19 | Jan 16–30 (transplant) Jan 16–30 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Summer squash / zucchini | Dec 12–19 | Jan 16–30 (transplant) Jan 16–30 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Winter squash | Dec 12–19 | Jan 16–30 (transplant) Jan 16–30 (sow outdoors) | – |
| Pumpkin | – | Jan 16–30 (sow outdoors) | – |
| Watermelon | Dec 12–19 | Jan 23–Feb 6 (transplant) Jan 23–Feb 6 (sow outdoors) | – |
| Cantaloupe / muskmelon | Dec 12–19 | Jan 23–Feb 6 (transplant) Jan 23–Feb 6 (sow outdoors) | – |
| Okra | Nov 28–Dec 12 | Jan 23–Feb 6 (transplant) Jan 23–Feb 6 (sow outdoors) | – |
| Celery | Oct 17–31 | Jan 16–23 (transplant) | – |
| Basil | Nov 28–Dec 12 | Jan 16–30 (transplant) Jan 16–30 (sow outdoors) | – |
| Cilantro | – | Dec 26–Jan 23 (sow outdoors) | Oct 19–Nov 2 (sowing) |
| Parsley | Oct 31–Nov 14 | Dec 26–Jan 9 (transplant) Dec 19–Jan 9 (sow outdoors) | – |
| Dill | – | Jan 9–23 (sow outdoors) | Oct 19–Nov 2 (sowing) |
| Sunflower | – | Jan 9–23 (sow outdoors) | – |
| Asparagus (crowns) | – | Dec 12–26 (transplant) | – |
| Rhubarb (crowns) | – | Dec 12–26 (transplant) | – |
| Strawberry (plants) | – | Dec 12–26 (transplant) | Oct 5–Nov 2 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Where these numbers come from
Station: Concord Buchanan Fld, CA (NOAA GHCN-Daily ID USW00023254), elevation 18 ft, 2.3 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Concord Wwtp, CA | 3 mi | Jan 7 | Dec 19 |
| Martinez WTP, CA | 6 mi | Feb 28 | Nov 22 |
| Mt Diablo Junction, CA | 9 mi | Mar 8 | Dec 22 |
The average last-frost dates of these stations span 63 days, a rough guide to local variation. See data sources & methods.
Frost questions for 94519
When is the last frost in 94519?
The average (50% chance) last spring freeze of 32°F for ZIP 94519 is January 9. For a more cautious planting date, use February 12, when only 1 year in 10 still sees a later freeze.
When is the first frost in 94519?
The average first fall freeze is December 14. In 1 year in 10 it comes by November 28.
What hardiness zone is 94519?
ZIP 94519 is in USDA zone 9b (25 to 30°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 94519 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
94520 Concord 94518 Concord 94521 Concord 94523 Pleasant Hill 94565 Pittsburg 94598 Walnut Creek 94597 Walnut Creek 94596 Walnut Creek
Other ZIP codes in Contra Costa County
94505 94506 94507 94509 94511 94513 94514 94516 94517 94518 94520 94521 94523 94525 94526 94528 94530 94531 94547 94548 94549 94553 94556 94561 All Contra Costa County frost dates · California frost dates
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- Freeze alerts
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Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.