Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 94562 (Oakville, 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, Saint Helena, CA (6 miles away).
- Average last spring frostFeb 350% chance of a 32°F freeze after this date
- Average first fall frostDec 450% chance of a 32°F freeze by this date
- Growing season (frost-free)306 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
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 94562 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 Mar 21 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 Sep 25–Oct 23
- Lettuce: fall transplant Oct 9–30
- Spinach: fall sowing Oct 9–30
- Bok choy / Asian greens: fall sowing Oct 9–23
- Arugula: fall sowing Oct 9–Nov 6
- Mustard greens: fall sowing Oct 9–23
- Cilantro: fall sowing Oct 9–23
- Dill: fall sowing Oct 9–23
- Strawberry (plants): fall transplant Sep 25–Oct 23
Coming up in the next 3 weeks
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Dec 4: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
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 28 (prior Dec) |
| 50% (the "average" last frost) | Feb 3 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 13 |
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 14 |
| 50% (the "average" first frost) | Dec 4 |
| 90% (late: most years have frozen by now) | Jan 1 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 19 | Nov 18 |
| 32°F (freeze) | Feb 3 | Dec 4 |
| 28°F (hard freeze) | Jan 5 | Dec 17 |
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 94562
Dates count from your average last spring frost (Feb 3) and first fall frost (Dec 4). 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 | Dec 9–23 | Feb 10–24 (transplant) | Aug 7–Sep 4 (transplant) |
| Pepper (sweet and hot) | Nov 25–Dec 9 | Feb 17–Mar 3 (transplant) | Aug 14–Sep 4 (transplant) |
| Eggplant | Nov 25–Dec 9 | Feb 17–Mar 3 (transplant) | Aug 14–Sep 4 (transplant) |
| Tomatillo | Dec 9–23 | Feb 10–24 (transplant) | – |
| Lettuce | Dec 9–23 | Jan 13–Feb 3 (transplant) Jan 6–Feb 17 (sow outdoors) | Oct 9–30 (transplant) Sep 25–Oct 23 (sowing) |
| Spinach | – | Dec 23–Jan 13 (sow outdoors) | Oct 9–30 (sowing) |
| Kale | Dec 9–23 | Jan 6–20 (transplant) Jan 6–20 (sow outdoors) | Sep 11–Oct 9 (transplant) Aug 28–Sep 25 (sowing) |
| Collards | Dec 9–23 | Jan 6–Feb 3 (transplant) Jan 6–Feb 3 (sow outdoors) | Sep 11–Oct 9 (transplant) Aug 28–Sep 25 (sowing) |
| Broccoli | Nov 25–Dec 9 | Jan 6–20 (transplant) | Aug 28–Sep 25 (transplant) |
| Cabbage | Nov 25–Dec 9 | Jan 6–20 (transplant) | Aug 28–Sep 25 (transplant) |
| Cauliflower | Nov 25–Dec 9 | Jan 20–Feb 3 (transplant) | Aug 28–Sep 25 (transplant) |
| Brussels sprouts | Nov 11–25 | Jan 6–20 (transplant) | Aug 14–Sep 4 (transplant) |
| Kohlrabi | Dec 9–23 | Jan 6–20 (transplant) Jan 6–20 (sow outdoors) | Sep 25–Oct 9 (sowing) |
| Bok choy / Asian greens | – | Jan 6–20 (sow outdoors) | Oct 9–23 (sowing) |
| Arugula | – | Jan 6–Feb 3 (sow outdoors) | Oct 9–Nov 6 (sowing) |
| Mustard greens | – | Jan 6–27 (sow outdoors) | Oct 9–23 (sowing) |
| Swiss chard | Dec 23–Jan 6 | Jan 20–Feb 10 (transplant) Jan 20–Feb 17 (sow outdoors) | Sep 25–Oct 9 (sowing) |
| Beet | – | Jan 6–Feb 3 (sow outdoors) | Sep 25–Oct 9 (sowing) |
| Carrot | – | Jan 13–Feb 10 (sow outdoors) | Sep 11–25 (sowing) |
| Radish | – | Dec 30–Feb 10 (sow outdoors) | Oct 23–Nov 6 (sowing) |
| Turnip | – | Jan 6–27 (sow outdoors) | Sep 25–Oct 9 (sowing) |
| Parsnip | – | Jan 13–Feb 3 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 9–Jan 6 (sow outdoors) | Sep 11–25 (sowing) |
| Onion (bulbing) | Nov 11–25 | Dec 23–Jan 6 (transplant) | – |
| Green onion / scallion | – | Dec 23–Jan 20 (sow outdoors) | Sep 25–Oct 9 (sowing) |
| Leek | Nov 11–25 | Jan 6–20 (transplant) | – |
| Garlic | – | – | Oct 23–Nov 20 (sowing) |
| Shallot | – | Dec 23–Jan 6 (transplant) | Oct 23–Nov 20 (sowing) |
| Potato | – | Jan 6–20 (transplant) | Aug 14–28 (transplant) |
| Sweet potato | – | Feb 24–Mar 10 (transplant) | – |
| Sweet corn | – | Feb 10–24 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 10–24 (sow outdoors) | Sep 11–25 (sowing) |
| Bean, pole | – | Feb 10–24 (sow outdoors) | – |
| Lima bean | – | Feb 17–Mar 3 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Feb 24–Mar 17 (sow outdoors) | – |
| Cucumber | Jan 6–13 | Feb 10–24 (transplant) Feb 10–24 (sow outdoors) | Sep 11–25 (sowing) |
| Summer squash / zucchini | Jan 6–13 | Feb 10–24 (transplant) Feb 10–24 (sow outdoors) | Sep 11–25 (sowing) |
| Winter squash | Jan 6–13 | Feb 10–24 (transplant) Feb 10–24 (sow outdoors) | – |
| Pumpkin | – | Feb 10–24 (sow outdoors) | – |
| Watermelon | Jan 6–13 | Feb 17–Mar 3 (transplant) Feb 17–Mar 3 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 6–13 | Feb 17–Mar 3 (transplant) Feb 17–Mar 3 (sow outdoors) | – |
| Okra | Dec 23–Jan 6 | Feb 17–Mar 3 (transplant) Feb 17–Mar 3 (sow outdoors) | – |
| Celery | Nov 11–25 | Feb 10–17 (transplant) | – |
| Basil | Dec 23–Jan 6 | Feb 10–24 (transplant) Feb 10–24 (sow outdoors) | – |
| Cilantro | – | Jan 20–Feb 17 (sow outdoors) | Oct 9–23 (sowing) |
| Parsley | Nov 25–Dec 9 | Jan 20–Feb 3 (transplant) Jan 13–Feb 3 (sow outdoors) | – |
| Dill | – | Feb 3–17 (sow outdoors) | Oct 9–23 (sowing) |
| Sunflower | – | Feb 3–17 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 6–20 (transplant) | – |
| Rhubarb (crowns) | – | Jan 6–20 (transplant) | – |
| Strawberry (plants) | – | Jan 6–20 (transplant) | Sep 25–Oct 23 (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: Saint Helena, CA (NOAA GHCN-Daily ID USC00047643), elevation 225 ft, 6.3 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Sonoma, CA | 10 mi | Mar 2 | Nov 27 |
| Angwin Pacific Union College, CA | 10 mi | Apr 7 | Dec 5 |
| Napa State Hospital, CA | 13 mi | Feb 12 | Dec 4 |
The average last-frost dates of these stations span 66 days, a rough guide to local variation. See data sources & methods.
Frost questions for 94562
When is the last frost in 94562?
The average (50% chance) last spring freeze of 32°F for ZIP 94562 is February 3. For a more cautious planting date, use March 13, when only 1 year in 10 still sees a later freeze.
When is the first frost in 94562?
The average first fall freeze is December 4. In 1 year in 10 it comes by November 14.
What hardiness zone is 94562?
ZIP 94562 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 94562 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
94573 Rutherford 94599 Yountville 95442 Glen Ellen 95452 Kenwood 94574 St. Helena 95431 94576 Deer Park 95409 Santa Rosa
Other ZIP codes in Napa County
94503 94508 94558 94559 94567 94573 94574 94576 94599 All Napa 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.