Fall in zone 9aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 92327 (San Bernardino County, 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, Barstow Daggett AP, CA (3 miles away).
- Average last spring frostFeb 1950% chance of a 32°F freeze after this date
- Average first fall frostNov 2650% chance of a 32°F freeze by this date
- Growing season (frost-free)279 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
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 92327 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 Apr 6 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 transplant Oct 1–22
- Spinach: fall sowing Oct 1–22
- Arugula: fall sowing Oct 1–29
- Radish: fall sowing Oct 15–29
- Garlic: fall sowing Oct 15–Nov 12
- Shallot: fall sowing Oct 15–Nov 12
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 26: 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) | Jan 23 |
| 50% (the "average" last frost) | Feb 19 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 11 |
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 10 |
| 50% (the "average" first frost) | Nov 26 |
| 90% (late: most years have frozen by now) | Dec 11 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 11 | Nov 16 |
| 32°F (freeze) | Feb 19 | Nov 26 |
| 28°F (hard freeze) | Jan 28 | Dec 9 |
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 92327
Dates count from your average last spring frost (Feb 19) and first fall frost (Nov 26). 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 25–Jan 8 | Feb 26–Mar 12 (transplant) | Jul 30–Aug 27 (transplant) |
| Pepper (sweet and hot) | Dec 11–25 | Mar 5–19 (transplant) | Aug 6–27 (transplant) |
| Eggplant | Dec 11–25 | Mar 5–19 (transplant) | Aug 6–27 (transplant) |
| Tomatillo | Dec 25–Jan 8 | Feb 26–Mar 12 (transplant) | – |
| Lettuce | Dec 25–Jan 8 | Jan 29–Feb 19 (transplant) Jan 22–Mar 5 (sow outdoors) | Oct 1–22 (transplant) Sep 17–Oct 15 (sowing) |
| Spinach | – | Jan 8–29 (sow outdoors) | Oct 1–22 (sowing) |
| Kale | Dec 25–Jan 8 | Jan 22–Feb 5 (transplant) Jan 22–Feb 5 (sow outdoors) | Sep 3–Oct 1 (transplant) Aug 20–Sep 17 (sowing) |
| Collards | Dec 25–Jan 8 | Jan 22–Feb 19 (transplant) Jan 22–Feb 19 (sow outdoors) | Sep 3–Oct 1 (transplant) Aug 20–Sep 17 (sowing) |
| Broccoli | Dec 11–25 | Jan 22–Feb 5 (transplant) | Aug 20–Sep 17 (transplant) |
| Cabbage | Dec 11–25 | Jan 22–Feb 5 (transplant) | Aug 20–Sep 17 (transplant) |
| Cauliflower | Dec 11–25 | Feb 5–19 (transplant) | Aug 20–Sep 17 (transplant) |
| Brussels sprouts | Nov 27–Dec 11 | Jan 22–Feb 5 (transplant) | Aug 6–27 (transplant) |
| Kohlrabi | Dec 25–Jan 8 | Jan 22–Feb 5 (transplant) Jan 22–Feb 5 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Bok choy / Asian greens | – | Jan 22–Feb 5 (sow outdoors) | Oct 1–15 (sowing) |
| Arugula | – | Jan 22–Feb 19 (sow outdoors) | Oct 1–29 (sowing) |
| Mustard greens | – | Jan 22–Feb 12 (sow outdoors) | Oct 1–15 (sowing) |
| Swiss chard | Jan 8–22 | Feb 5–26 (transplant) Feb 5–Mar 5 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Beet | – | Jan 22–Feb 19 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Carrot | – | Jan 29–Feb 26 (sow outdoors) | Sep 3–17 (sowing) |
| Radish | – | Jan 15–Feb 26 (sow outdoors) | Oct 15–29 (sowing) |
| Turnip | – | Jan 22–Feb 12 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Parsnip | – | Jan 29–Feb 19 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 25–Jan 22 (sow outdoors) | Sep 3–17 (sowing) |
| Onion (bulbing) | Nov 27–Dec 11 | Jan 8–22 (transplant) | – |
| Green onion / scallion | – | Jan 8–Feb 5 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Leek | Nov 27–Dec 11 | Jan 22–Feb 5 (transplant) | – |
| Garlic | – | – | Oct 15–Nov 12 (sowing) |
| Shallot | – | Jan 8–22 (transplant) | Oct 15–Nov 12 (sowing) |
| Potato | – | Jan 22–Feb 5 (transplant) | Aug 6–20 (transplant) |
| Sweet potato | – | Mar 12–26 (transplant) | – |
| Sweet corn | – | Feb 26–Mar 12 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 26–Mar 12 (sow outdoors) | Sep 3–17 (sowing) |
| Bean, pole | – | Feb 26–Mar 12 (sow outdoors) | – |
| Lima bean | – | Mar 5–19 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 12–Apr 2 (sow outdoors) | – |
| Cucumber | Jan 22–29 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | Sep 3–17 (sowing) |
| Summer squash / zucchini | Jan 22–29 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | Sep 3–17 (sowing) |
| Winter squash | Jan 22–29 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | – |
| Pumpkin | – | Feb 26–Mar 12 (sow outdoors) | – |
| Watermelon | Jan 22–29 | Mar 5–19 (transplant) Mar 5–19 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 22–29 | Mar 5–19 (transplant) Mar 5–19 (sow outdoors) | – |
| Okra | Jan 8–22 | Mar 5–19 (transplant) Mar 5–19 (sow outdoors) | – |
| Celery | Nov 27–Dec 11 | Feb 26–Mar 5 (transplant) | – |
| Basil | Jan 8–22 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | – |
| Cilantro | – | Feb 5–Mar 5 (sow outdoors) | Oct 1–15 (sowing) |
| Parsley | Dec 11–25 | Feb 5–19 (transplant) Jan 29–Feb 19 (sow outdoors) | – |
| Dill | – | Feb 19–Mar 5 (sow outdoors) | Oct 1–15 (sowing) |
| Sunflower | – | Feb 19–Mar 5 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 22–Feb 5 (transplant) | – |
| Rhubarb (crowns) | – | Jan 22–Feb 5 (transplant) | – |
| Strawberry (plants) | – | Jan 22–Feb 5 (transplant) | Sep 17–Oct 15 (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: Barstow Daggett AP, CA (NOAA GHCN-Daily ID USW00023161), elevation 1,917 ft, 3.0 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Barstow, CA | 11 mi | Feb 22 | Nov 23 |
| Victorville, CA | 35 mi | Mar 18 | Nov 11 |
| Johnson Valley, CA | 39 mi | Mar 1 | Nov 29 |
The average last-frost dates of these stations span 30 days, a rough guide to local variation. See data sources & methods.
Frost questions for 92327
When is the last frost in 92327?
The average (50% chance) last spring freeze of 32°F for ZIP 92327 is February 19. For a more cautious planting date, use March 11, when only 1 year in 10 still sees a later freeze.
When is the first frost in 92327?
The average first fall freeze is November 26. In 1 year in 10 it comes by November 10.
What hardiness zone is 92327?
ZIP 92327 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 92327 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
92398 Yermo 92311 Barstow 92365 92347 92356 Lucerne Valley 92307 Apple Valley 92342 Silver Lakes 92368
Other ZIP codes in San Bernardino County
91701 91708 91709 91710 91730 91737 91739 91761 91762 91763 91764 91784 91786 92242 92252 92256 92267 92268 92277 92278 92280 92284 92285 92301 All San Bernardino County frost dates · California frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- 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.