Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 95623 (Diamond Springs, 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, Placerville, CA (4 miles away).
- Average last spring frostMar 3150% chance of a 32°F freeze after this date
- Average first fall frostNov 2150% chance of a 32°F freeze by this date
- Growing season (frost-free)237 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 95623 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 May 16 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
- Arugula: fall sowing Sep 26–Oct 24
- Radish: fall sowing Oct 10–24
- Garlic: fall sowing Oct 10–Nov 7
- Shallot: fall sowing Oct 10–Nov 7
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 21: 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) | Feb 24 |
| 50% (the "average" last frost) | Mar 31 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 23 |
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 1 |
| 50% (the "average" first frost) | Nov 21 |
| 90% (late: most years have frozen by now) | Dec 7 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 23 | Nov 6 |
| 32°F (freeze) | Mar 31 | Nov 21 |
| 28°F (hard freeze) | Feb 15 | Dec 5 |
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 95623
Dates count from your average last spring frost (Mar 31) and first fall frost (Nov 21). 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 | Feb 3–17 | Apr 7–21 (transplant) | Jul 25–Aug 22 (transplant) |
| Pepper (sweet and hot) | Jan 20–Feb 3 | Apr 14–28 (transplant) | Aug 1–22 (transplant) |
| Eggplant | Jan 20–Feb 3 | Apr 14–28 (transplant) | Aug 1–22 (transplant) |
| Tomatillo | Feb 3–17 | Apr 7–21 (transplant) | – |
| Lettuce | Feb 3–17 | Mar 10–31 (transplant) Mar 3–Apr 14 (sow outdoors) | Sep 26–Oct 17 (transplant) Sep 12–Oct 10 (sowing) |
| Spinach | – | Feb 17–Mar 10 (sow outdoors) | Sep 26–Oct 17 (sowing) |
| Kale | Feb 3–17 | Mar 3–17 (transplant) Mar 3–17 (sow outdoors) | Aug 29–Sep 26 (transplant) Aug 15–Sep 12 (sowing) |
| Collards | Feb 3–17 | Mar 3–31 (transplant) Mar 3–31 (sow outdoors) | Aug 29–Sep 26 (transplant) Aug 15–Sep 12 (sowing) |
| Broccoli | Jan 20–Feb 3 | Mar 3–17 (transplant) | Aug 15–Sep 12 (transplant) |
| Cabbage | Jan 20–Feb 3 | Mar 3–17 (transplant) | Aug 15–Sep 12 (transplant) |
| Cauliflower | Jan 20–Feb 3 | Mar 17–31 (transplant) | Aug 15–Sep 12 (transplant) |
| Brussels sprouts | Jan 6–20 | Mar 3–17 (transplant) | Aug 1–22 (transplant) |
| Kohlrabi | Feb 3–17 | Mar 3–17 (transplant) Mar 3–17 (sow outdoors) | Sep 12–26 (sowing) |
| Bok choy / Asian greens | – | Mar 3–17 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Arugula | – | Mar 3–31 (sow outdoors) | Sep 26–Oct 24 (sowing) |
| Mustard greens | – | Mar 3–24 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Swiss chard | Feb 17–Mar 3 | Mar 17–Apr 7 (transplant) Mar 17–Apr 14 (sow outdoors) | Sep 12–26 (sowing) |
| Beet | – | Mar 3–31 (sow outdoors) | Sep 12–26 (sowing) |
| Carrot | – | Mar 10–Apr 7 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Radish | – | Feb 24–Apr 7 (sow outdoors) | Oct 10–24 (sowing) |
| Turnip | – | Mar 3–24 (sow outdoors) | Sep 12–26 (sowing) |
| Parsnip | – | Mar 10–31 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 3–Mar 3 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Onion (bulbing) | Jan 6–20 | Feb 17–Mar 3 (transplant) | – |
| Green onion / scallion | – | Feb 17–Mar 17 (sow outdoors) | Sep 12–26 (sowing) |
| Leek | Jan 6–20 | Mar 3–17 (transplant) | – |
| Garlic | – | – | Oct 10–Nov 7 (sowing) |
| Shallot | – | Feb 17–Mar 3 (transplant) | Oct 10–Nov 7 (sowing) |
| Potato | – | Mar 3–17 (transplant) | Aug 1–15 (transplant) |
| Sweet potato | – | Apr 21–May 5 (transplant) | – |
| Sweet corn | – | Apr 7–21 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 7–21 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Bean, pole | – | Apr 7–21 (sow outdoors) | – |
| Lima bean | – | Apr 14–28 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 21–May 12 (sow outdoors) | – |
| Cucumber | Mar 3–10 | Apr 7–21 (transplant) Apr 7–21 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Summer squash / zucchini | Mar 3–10 | Apr 7–21 (transplant) Apr 7–21 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Winter squash | Mar 3–10 | Apr 7–21 (transplant) Apr 7–21 (sow outdoors) | – |
| Pumpkin | – | Apr 7–21 (sow outdoors) | – |
| Watermelon | Mar 3–10 | Apr 14–28 (transplant) Apr 14–28 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 3–10 | Apr 14–28 (transplant) Apr 14–28 (sow outdoors) | – |
| Okra | Feb 17–Mar 3 | Apr 14–28 (transplant) Apr 14–28 (sow outdoors) | – |
| Celery | Jan 6–20 | Apr 7–14 (transplant) | – |
| Basil | Feb 17–Mar 3 | Apr 7–21 (transplant) Apr 7–21 (sow outdoors) | – |
| Cilantro | – | Mar 17–Apr 14 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Parsley | Jan 20–Feb 3 | Mar 17–31 (transplant) Mar 10–31 (sow outdoors) | – |
| Dill | – | Mar 31–Apr 14 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Sunflower | – | Mar 31–Apr 14 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 3–17 (transplant) | – |
| Rhubarb (crowns) | – | Mar 3–17 (transplant) | – |
| Strawberry (plants) | – | Mar 3–17 (transplant) | Sep 12–Oct 10 (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: Placerville, CA (NOAA GHCN-Daily ID USC00046960), elevation 1,850 ft, 4.5 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Sutter Hill Cdf, CA | 18 mi | Mar 4 | Dec 11 |
| Pacific House, CA | 20 mi | Apr 26 | Nov 2 |
| Georgetown Rs, CA | 21 mi | Apr 12 | Nov 21 |
The average last-frost dates of these stations span 53 days, a rough guide to local variation. See data sources & methods.
Frost questions for 95623
When is the last frost in 95623?
The average (50% chance) last spring freeze of 32°F for ZIP 95623 is March 31. For a more cautious planting date, use April 23, when only 1 year in 10 still sees a later freeze.
When is the first frost in 95623?
The average first fall freeze is November 21. In 1 year in 10 it comes by November 1.
What hardiness zone is 95623?
ZIP 95623 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 95623 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
95619 Diamond Springs 95682 Cameron Park 95667 Placerville 95675 River Pines 95672 Cameron Park 95669 Plymouth 95709 Camino 95629 Fiddletown
Other ZIP codes in El Dorado County
95613 95614 95619 95633 95634 95635 95636 95651 95664 95667 95672 95682 95684 95709 95720 95721 95726 95735 95762 96142 96150 96155 All El Dorado 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.