Fall in zone 9aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 92311 (Barstow, 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, CA (5 miles away).
- Average last spring frostFeb 2250% chance of a 32°F freeze after this date
- Average first fall frostNov 2350% chance of a 32°F freeze by this date
- Growing season (frost-free)271 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 92311 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 9 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 Sep 28–Oct 19
- Spinach: fall sowing Sep 28–Oct 19
- Arugula: fall sowing Sep 28–Oct 26
- Radish: fall sowing Oct 12–26
- Garlic: fall sowing Oct 12–Nov 9
- Shallot: fall sowing Oct 12–Nov 9
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 23: 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 29 |
| 50% (the "average" last frost) | Feb 22 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 24 |
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 9 |
| 50% (the "average" first frost) | Nov 23 |
| 90% (late: most years have frozen by now) | Dec 8 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 17 | Nov 12 |
| 32°F (freeze) | Feb 22 | Nov 23 |
| 28°F (hard freeze) | Jan 30 | Dec 6 |
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 92311
Dates count from your average last spring frost (Feb 22) and first fall frost (Nov 23). 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 28–Jan 11 | Mar 1–15 (transplant) | Jul 27–Aug 24 (transplant) |
| Pepper (sweet and hot) | Dec 14–28 | Mar 8–22 (transplant) | Aug 3–24 (transplant) |
| Eggplant | Dec 14–28 | Mar 8–22 (transplant) | Aug 3–24 (transplant) |
| Tomatillo | Dec 28–Jan 11 | Mar 1–15 (transplant) | – |
| Lettuce | Dec 28–Jan 11 | Feb 1–22 (transplant) Jan 25–Mar 8 (sow outdoors) | Sep 28–Oct 19 (transplant) Sep 14–Oct 12 (sowing) |
| Spinach | – | Jan 11–Feb 1 (sow outdoors) | Sep 28–Oct 19 (sowing) |
| Kale | Dec 28–Jan 11 | Jan 25–Feb 8 (transplant) Jan 25–Feb 8 (sow outdoors) | Aug 31–Sep 28 (transplant) Aug 17–Sep 14 (sowing) |
| Collards | Dec 28–Jan 11 | Jan 25–Feb 22 (transplant) Jan 25–Feb 22 (sow outdoors) | Aug 31–Sep 28 (transplant) Aug 17–Sep 14 (sowing) |
| Broccoli | Dec 14–28 | Jan 25–Feb 8 (transplant) | Aug 17–Sep 14 (transplant) |
| Cabbage | Dec 14–28 | Jan 25–Feb 8 (transplant) | Aug 17–Sep 14 (transplant) |
| Cauliflower | Dec 14–28 | Feb 8–22 (transplant) | Aug 17–Sep 14 (transplant) |
| Brussels sprouts | Nov 30–Dec 14 | Jan 25–Feb 8 (transplant) | Aug 3–24 (transplant) |
| Kohlrabi | Dec 28–Jan 11 | Jan 25–Feb 8 (transplant) Jan 25–Feb 8 (sow outdoors) | Sep 14–28 (sowing) |
| Bok choy / Asian greens | – | Jan 25–Feb 8 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Arugula | – | Jan 25–Feb 22 (sow outdoors) | Sep 28–Oct 26 (sowing) |
| Mustard greens | – | Jan 25–Feb 15 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Swiss chard | Jan 11–25 | Feb 8–Mar 1 (transplant) Feb 8–Mar 8 (sow outdoors) | Sep 14–28 (sowing) |
| Beet | – | Jan 25–Feb 22 (sow outdoors) | Sep 14–28 (sowing) |
| Carrot | – | Feb 1–Mar 1 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Radish | – | Jan 18–Mar 1 (sow outdoors) | Oct 12–26 (sowing) |
| Turnip | – | Jan 25–Feb 15 (sow outdoors) | Sep 14–28 (sowing) |
| Parsnip | – | Feb 1–22 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 28–Jan 25 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Onion (bulbing) | Nov 30–Dec 14 | Jan 11–25 (transplant) | – |
| Green onion / scallion | – | Jan 11–Feb 8 (sow outdoors) | Sep 14–28 (sowing) |
| Leek | Nov 30–Dec 14 | Jan 25–Feb 8 (transplant) | – |
| Garlic | – | – | Oct 12–Nov 9 (sowing) |
| Shallot | – | Jan 11–25 (transplant) | Oct 12–Nov 9 (sowing) |
| Potato | – | Jan 25–Feb 8 (transplant) | Aug 3–17 (transplant) |
| Sweet potato | – | Mar 15–29 (transplant) | – |
| Sweet corn | – | Mar 1–15 (sow outdoors) | – |
| Bean, bush (snap) | – | Mar 1–15 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Bean, pole | – | Mar 1–15 (sow outdoors) | – |
| Lima bean | – | Mar 8–22 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 15–Apr 5 (sow outdoors) | – |
| Cucumber | Jan 25–Feb 1 | Mar 1–15 (transplant) Mar 1–15 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Summer squash / zucchini | Jan 25–Feb 1 | Mar 1–15 (transplant) Mar 1–15 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Winter squash | Jan 25–Feb 1 | Mar 1–15 (transplant) Mar 1–15 (sow outdoors) | – |
| Pumpkin | – | Mar 1–15 (sow outdoors) | – |
| Watermelon | Jan 25–Feb 1 | Mar 8–22 (transplant) Mar 8–22 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 25–Feb 1 | Mar 8–22 (transplant) Mar 8–22 (sow outdoors) | – |
| Okra | Jan 11–25 | Mar 8–22 (transplant) Mar 8–22 (sow outdoors) | – |
| Celery | Nov 30–Dec 14 | Mar 1–8 (transplant) | – |
| Basil | Jan 11–25 | Mar 1–15 (transplant) Mar 1–15 (sow outdoors) | – |
| Cilantro | – | Feb 8–Mar 8 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Parsley | Dec 14–28 | Feb 8–22 (transplant) Feb 1–22 (sow outdoors) | – |
| Dill | – | Feb 22–Mar 8 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Sunflower | – | Feb 22–Mar 8 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 25–Feb 8 (transplant) | – |
| Rhubarb (crowns) | – | Jan 25–Feb 8 (transplant) | – |
| Strawberry (plants) | – | Jan 25–Feb 8 (transplant) | Sep 14–Oct 12 (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, CA (NOAA GHCN-Daily ID USC00040521), elevation 2,220 ft, 5.2 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Barstow Daggett AP, CA | 14 mi | Feb 19 | Nov 26 |
| Victorville, CA | 34 mi | Mar 18 | Nov 11 |
| Hesperia 2E, CA | 41 mi | Feb 28 | Dec 1 |
The average last-frost dates of these stations span 30 days, a rough guide to local variation. See data sources & methods.
Frost questions for 92311
When is the last frost in 92311?
The average (50% chance) last spring freeze of 32°F for ZIP 92311 is February 22. For a more cautious planting date, use March 24, when only 1 year in 10 still sees a later freeze.
When is the first frost in 92311?
The average first fall freeze is November 23. In 1 year in 10 it comes by November 9.
What hardiness zone is 92311?
ZIP 92311 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 92311 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 92327 92347 92342 Silver Lakes 92365 92368 92307 Apple Valley 92310
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.