Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 94513 (Brentwood, 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, Antioch Pumping Plt #3, CA (5 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 81% of years (about 7 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 1250% chance of a 32°F freeze after this date
- Average first fall frostDec 1950% 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 94513 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 27 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 10–Nov 7
- Kale: fall transplant Sep 26–Oct 24
- Collards: fall transplant Sep 26–Oct 24
- Kohlrabi: fall sowing Oct 10–24
- Swiss chard: fall sowing Oct 10–24
- Beet: fall sowing Oct 10–24
- Turnip: fall sowing Oct 10–24
- Green onion / scallion: fall sowing Oct 10–24
- Strawberry (plants): fall transplant Oct 10–Nov 7
Coming up in the next 3 weeks
- Pepper (sweet and hot): start seeds indoors Nov 3–17
- Eggplant: start seeds indoors Nov 3–17
- Lettuce: fall transplant Oct 24–Nov 14
- Spinach: fall sowing Oct 24–Nov 14
- Broccoli: start seeds indoors Nov 3–17
- Cabbage: start seeds indoors Nov 3–17
- Cauliflower: start seeds indoors Nov 3–17
- Brussels sprouts: start seeds indoors Oct 20–Nov 3
- Bok choy / Asian greens: fall sowing Oct 24–Nov 7
- Arugula: fall sowing Oct 24–Nov 21
- Mustard greens: fall sowing Oct 24–Nov 7
- Radish: fall sowing Nov 7–21
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 20 (prior Dec) |
| 50% (the "average" last frost) | Jan 12 |
| 10% (cautious: only 1 year in 10 freezes later) | Feb 1 |
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 29 |
| 50% (the "average" first frost) | Dec 19 |
| 90% (late: most years have frozen by now) | Jan 12 (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 8 | Dec 4 |
| 32°F (freeze) | Jan 12 | Dec 19 |
| 28°F (hard freeze) | Jan 2 | Dec 29 |
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 94513
Dates count from your average last spring frost (Jan 12) and first fall frost (Dec 19). 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 17–Dec 1 | Jan 19–Feb 2 (transplant) | Aug 22–Sep 19 (transplant) |
| Pepper (sweet and hot) | Nov 3–17 | Jan 26–Feb 9 (transplant) | Aug 29–Sep 19 (transplant) |
| Eggplant | Nov 3–17 | Jan 26–Feb 9 (transplant) | Aug 29–Sep 19 (transplant) |
| Tomatillo | Nov 17–Dec 1 | Jan 19–Feb 2 (transplant) | – |
| Lettuce | Nov 17–Dec 1 | Dec 22–Jan 12 (transplant) Dec 15–Jan 26 (sow outdoors) | Oct 24–Nov 14 (transplant) Oct 10–Nov 7 (sowing) |
| Spinach | – | Dec 1–22 (sow outdoors) | Oct 24–Nov 14 (sowing) |
| Kale | Nov 17–Dec 1 | Dec 15–29 (transplant) Dec 15–29 (sow outdoors) | Sep 26–Oct 24 (transplant) Sep 12–Oct 10 (sowing) |
| Collards | Nov 17–Dec 1 | Dec 15–Jan 12 (transplant) Dec 15–Jan 12 (sow outdoors) | Sep 26–Oct 24 (transplant) Sep 12–Oct 10 (sowing) |
| Broccoli | Nov 3–17 | Dec 15–29 (transplant) | Sep 12–Oct 10 (transplant) |
| Cabbage | Nov 3–17 | Dec 15–29 (transplant) | Sep 12–Oct 10 (transplant) |
| Cauliflower | Nov 3–17 | Dec 29–Jan 12 (transplant) | Sep 12–Oct 10 (transplant) |
| Brussels sprouts | Oct 20–Nov 3 | Dec 15–29 (transplant) | Aug 29–Sep 19 (transplant) |
| Kohlrabi | Nov 17–Dec 1 | Dec 15–29 (transplant) Dec 15–29 (sow outdoors) | Oct 10–24 (sowing) |
| Bok choy / Asian greens | – | Dec 15–29 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Arugula | – | Dec 15–Jan 12 (sow outdoors) | Oct 24–Nov 21 (sowing) |
| Mustard greens | – | Dec 15–Jan 5 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Swiss chard | Dec 1–15 | Dec 29–Jan 19 (transplant) Dec 29–Jan 26 (sow outdoors) | Oct 10–24 (sowing) |
| Beet | – | Dec 15–Jan 12 (sow outdoors) | Oct 10–24 (sowing) |
| Carrot | – | Dec 22–Jan 19 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Radish | – | Dec 8–Jan 19 (sow outdoors) | Nov 7–21 (sowing) |
| Turnip | – | Dec 15–Jan 5 (sow outdoors) | Oct 10–24 (sowing) |
| Parsnip | – | Dec 22–Jan 12 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Nov 17–Dec 15 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Onion (bulbing) | Oct 20–Nov 3 | Dec 1–15 (transplant) | – |
| Green onion / scallion | – | Dec 1–29 (sow outdoors) | Oct 10–24 (sowing) |
| Leek | Oct 20–Nov 3 | Dec 15–29 (transplant) | – |
| Garlic | – | – | Nov 7–Dec 5 (sowing) |
| Shallot | – | Dec 1–15 (transplant) | Nov 7–Dec 5 (sowing) |
| Potato | – | Dec 15–29 (transplant) | Aug 29–Sep 12 (transplant) |
| Sweet potato | – | Feb 2–16 (transplant) | – |
| Sweet corn | – | Jan 19–Feb 2 (sow outdoors) | – |
| Bean, bush (snap) | – | Jan 19–Feb 2 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Bean, pole | – | Jan 19–Feb 2 (sow outdoors) | – |
| Lima bean | – | Jan 26–Feb 9 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Feb 2–23 (sow outdoors) | – |
| Cucumber | Dec 15–22 | Jan 19–Feb 2 (transplant) Jan 19–Feb 2 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Summer squash / zucchini | Dec 15–22 | Jan 19–Feb 2 (transplant) Jan 19–Feb 2 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Winter squash | Dec 15–22 | Jan 19–Feb 2 (transplant) Jan 19–Feb 2 (sow outdoors) | – |
| Pumpkin | – | Jan 19–Feb 2 (sow outdoors) | – |
| Watermelon | Dec 15–22 | Jan 26–Feb 9 (transplant) Jan 26–Feb 9 (sow outdoors) | – |
| Cantaloupe / muskmelon | Dec 15–22 | Jan 26–Feb 9 (transplant) Jan 26–Feb 9 (sow outdoors) | – |
| Okra | Dec 1–15 | Jan 26–Feb 9 (transplant) Jan 26–Feb 9 (sow outdoors) | – |
| Celery | Oct 20–Nov 3 | Jan 19–26 (transplant) | – |
| Basil | Dec 1–15 | Jan 19–Feb 2 (transplant) Jan 19–Feb 2 (sow outdoors) | – |
| Cilantro | – | Dec 29–Jan 26 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Parsley | Nov 3–17 | Dec 29–Jan 12 (transplant) Dec 22–Jan 12 (sow outdoors) | – |
| Dill | – | Jan 12–26 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Sunflower | – | Jan 12–26 (sow outdoors) | – |
| Asparagus (crowns) | – | Dec 15–29 (transplant) | – |
| Rhubarb (crowns) | – | Dec 15–29 (transplant) | – |
| Strawberry (plants) | – | Dec 15–29 (transplant) | Oct 10–Nov 7 (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: Antioch Pumping Plt #3, CA (NOAA GHCN-Daily ID USC00040232), elevation 60 ft, 5.4 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Tracy Pumping Plt, CA | 11 mi | Jan 19 | Dec 10 |
| Mt Diablo Junction, CA | 14 mi | Mar 8 | Dec 22 |
| Livermore, CA | 17 mi | Feb 15 | Dec 2 |
The average last-frost dates of these stations span 58 days, a rough guide to local variation. See data sources & methods.
Frost questions for 94513
When is the last frost in 94513?
The average (50% chance) last spring freeze of 32°F for ZIP 94513 is January 12. For a more cautious planting date, use February 1, when only 1 year in 10 still sees a later freeze.
When is the first frost in 94513?
The average first fall freeze is December 19. In 1 year in 10 it comes by November 29.
What hardiness zone is 94513?
ZIP 94513 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 94513 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
94548 Knightsen 94561 Oakley 94531 Antioch 94505 Discovery Bay 94514 Byron 94511 Bethel Island 94509 Antioch 95391 Mountain House
Other ZIP codes in Contra Costa County
94505 94506 94507 94509 94511 94514 94516 94517 94518 94519 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.