Fall in zone 9aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 95666 (Buckhorn, 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, Pacific House, CA (18 miles away).
- Average last spring frostApr 2650% chance of a 32°F freeze after this date
- Average first fall frostNov 250% chance of a 32°F freeze by this date
- Growing season (frost-free)191 daysmedian, 32°F threshold
- USDA hardiness zone9a20 to 25°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
58°F 55°F or warmer
24-hour average · latest 57°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Yosemite Village 12 W (61 mi).
4-inch depth
63°F 55°F or warmer
24-hour average · latest 63°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Yosemite Village 12 W (61 mi).
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 95666 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 63°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
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 Jun 11 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
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 2: 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) | Apr 10 |
| 50% (the "average" last frost) | Apr 26 |
| 10% (cautious: only 1 year in 10 freezes later) | May 19 |
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) | Oct 14 |
| 50% (the "average" first frost) | Nov 2 |
| 90% (late: most years have frozen by now) | Nov 20 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 20 | Oct 16 |
| 32°F (freeze) | Apr 26 | Nov 2 |
| 28°F (hard freeze) | Apr 6 | Nov 22 |
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 95666
Dates count from your average last spring frost (Apr 26) and first fall frost (Nov 2). 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 | Mar 1–15 | May 3–17 (transplant) | – |
| Pepper (sweet and hot) | Feb 15–Mar 1 | May 10–24 (transplant) | – |
| Eggplant | Feb 15–Mar 1 | May 10–24 (transplant) | – |
| Tomatillo | Mar 1–15 | May 3–17 (transplant) | – |
| Lettuce | Mar 1–15 | Apr 5–26 (transplant) Mar 29–May 10 (sow outdoors) | Sep 7–28 (transplant) Aug 24–Sep 21 (sowing) |
| Spinach | – | Mar 15–Apr 5 (sow outdoors) | Sep 7–28 (sowing) |
| Kale | Mar 1–15 | Mar 29–Apr 12 (transplant) Mar 29–Apr 12 (sow outdoors) | Aug 10–Sep 7 (transplant) Jul 27–Aug 24 (sowing) |
| Collards | Mar 1–15 | Mar 29–Apr 26 (transplant) Mar 29–Apr 26 (sow outdoors) | Aug 10–Sep 7 (transplant) Jul 27–Aug 24 (sowing) |
| Broccoli | Feb 15–Mar 1 | Mar 29–Apr 12 (transplant) | Jul 27–Aug 24 (transplant) |
| Cabbage | Feb 15–Mar 1 | Mar 29–Apr 12 (transplant) | Jul 27–Aug 24 (transplant) |
| Cauliflower | Feb 15–Mar 1 | Apr 12–26 (transplant) | Jul 27–Aug 24 (transplant) |
| Brussels sprouts | Feb 1–15 | Mar 29–Apr 12 (transplant) | Jul 13–Aug 3 (transplant) |
| Kohlrabi | Mar 1–15 | Mar 29–Apr 12 (transplant) Mar 29–Apr 12 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Bok choy / Asian greens | – | Mar 29–Apr 12 (sow outdoors) | Sep 7–21 (sowing) |
| Arugula | – | Mar 29–Apr 26 (sow outdoors) | Sep 7–Oct 5 (sowing) |
| Mustard greens | – | Mar 29–Apr 19 (sow outdoors) | Sep 7–21 (sowing) |
| Swiss chard | Mar 15–29 | Apr 12–May 3 (transplant) Apr 12–May 10 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Beet | – | Mar 29–Apr 26 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Carrot | – | Apr 5–May 3 (sow outdoors) | Aug 10–24 (sowing) |
| Radish | – | Mar 22–May 3 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Turnip | – | Mar 29–Apr 19 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Parsnip | – | Apr 5–26 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 1–29 (sow outdoors) | Aug 10–24 (sowing) |
| Onion (bulbing) | Feb 1–15 | Mar 15–29 (transplant) | – |
| Green onion / scallion | – | Mar 15–Apr 12 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Leek | Feb 1–15 | Mar 29–Apr 12 (transplant) | – |
| Garlic | – | – | Sep 21–Oct 19 (sowing) |
| Shallot | – | Mar 15–29 (transplant) | Sep 21–Oct 19 (sowing) |
| Potato | – | Mar 29–Apr 12 (transplant) | Jul 13–27 (transplant) |
| Sweet potato | – | May 17–31 (transplant) | – |
| Sweet corn | – | May 3–17 (sow outdoors) | – |
| Bean, bush (snap) | – | May 3–17 (sow outdoors) | – |
| Bean, pole | – | May 3–17 (sow outdoors) | – |
| Lima bean | – | May 10–24 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 17–Jun 7 (sow outdoors) | – |
| Cucumber | Mar 29–Apr 5 | May 3–17 (transplant) May 3–17 (sow outdoors) | – |
| Summer squash / zucchini | Mar 29–Apr 5 | May 3–17 (transplant) May 3–17 (sow outdoors) | – |
| Winter squash | Mar 29–Apr 5 | May 3–17 (transplant) May 3–17 (sow outdoors) | – |
| Pumpkin | – | May 3–17 (sow outdoors) | – |
| Watermelon | Mar 29–Apr 5 | May 10–24 (transplant) May 10–24 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 29–Apr 5 | May 10–24 (transplant) May 10–24 (sow outdoors) | – |
| Okra | Mar 15–29 | May 10–24 (transplant) May 10–24 (sow outdoors) | – |
| Celery | Feb 1–15 | May 3–10 (transplant) | – |
| Basil | Mar 15–29 | May 3–17 (transplant) May 3–17 (sow outdoors) | – |
| Cilantro | – | Apr 12–May 10 (sow outdoors) | Sep 7–21 (sowing) |
| Parsley | Feb 15–Mar 1 | Apr 12–26 (transplant) Apr 5–26 (sow outdoors) | – |
| Dill | – | Apr 26–May 10 (sow outdoors) | Sep 7–21 (sowing) |
| Sunflower | – | Apr 26–May 10 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 29–Apr 12 (transplant) | – |
| Rhubarb (crowns) | – | Mar 29–Apr 12 (transplant) | – |
| Strawberry (plants) | – | Mar 29–Apr 12 (transplant) | Aug 24–Sep 21 (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: Pacific House, CA (NOAA GHCN-Daily ID USC00046597), elevation 3,450 ft, 17.7 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Calaveras Big Trees, CA | 18 mi | May 7 | Oct 28 |
| Sutter Hill Cdf, CA | 28 mi | Mar 4 | Dec 11 |
| Placerville, CA | 29 mi | Mar 31 | Nov 21 |
The average last-frost dates of these stations span 65 days, a rough guide to local variation. See data sources & methods.
Frost questions for 95666
When is the last frost in 95666?
The average (50% chance) last spring freeze of 32°F for ZIP 95666 is April 26. For a more cautious planting date, use May 19, when only 1 year in 10 still sees a later freeze.
When is the first frost in 95666?
The average first fall freeze is November 2. In 1 year in 10 it comes by October 14.
What hardiness zone is 95666?
ZIP 95666 is in USDA zone 9a (20 to 25°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 95666 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
95684 95636 Grizzly Flats 95255 West Point 95257 95726 Pollock Pines 95689 Lockwood 95248 Rail Road Flat 95646 Kirkwood
Other ZIP codes in Amador County
95601 95629 95640 95642 95665 95669 95675 95685 95689 95699 All Amador County frost dates · California frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
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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.