Fall in zone 10aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 92227 (Brawley, 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, Brawley 2 SW, CA (13 miles away).
- Average last spring frostJan 1650% chance of a 32°F freeze after this date
- Average first fall frostDec 1950% chance of a 32°F freeze by this date
- Growing season (frost-free)335 daysmedian, 32°F threshold
- USDA hardiness zone10a30 to 35°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
78°F 55°F or warmer
24-hour average · latest 72°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Ford Dry Lake (48 mi), Desert Center (56 mi).
4-inch depth
79°F 55°F or warmer
24-hour average · latest 75°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Ford Dry Lake (48 mi), Desert Center (56 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 92227 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 79°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): not yet. Apply as soil cools toward 70°F (typically 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 3 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 Oct 10–Nov 7
- Kale: fall transplant Sep 26–Oct 24
- Collards: fall transplant Sep 26–Oct 24
- Kohlrabi: fall sowing Oct 10–24
- Swiss chard: fall sowing Oct 10–24
- Beet: fall sowing Oct 10–24
- Turnip: fall sowing Oct 10–24
- Green onion / scallion: fall sowing Oct 10–24
- Strawberry (plants): fall transplant Oct 10–Nov 7
Coming up in the next 3 weeks
- Pepper (sweet and hot): start seeds indoors Nov 7–21
- Eggplant: start seeds indoors Nov 7–21
- Lettuce: fall transplant Oct 24–Nov 14
- Spinach: fall sowing Oct 24–Nov 14
- Broccoli: start seeds indoors Nov 7–21
- Cabbage: start seeds indoors Nov 7–21
- Cauliflower: start seeds indoors Nov 7–21
- Brussels sprouts: start seeds indoors Oct 24–Nov 7
- Bok choy / Asian greens: fall sowing Oct 24–Nov 7
- Arugula: fall sowing Oct 24–Nov 21
- Mustard greens: fall sowing Oct 24–Nov 7
- Radish: fall sowing Nov 7–21
Prune now
No frost-timed pruning windows are open this week.
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 21 (prior Dec) |
| 50% (the "average" last frost) | Jan 16 |
| 10% (cautious: only 1 year in 10 freezes later) | Feb 17 |
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) | Dec 2 |
| 50% (the "average" first frost) | Dec 19 |
| 90% (late: most years have frozen by now) | Jan 17 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Feb 10 | Dec 6 |
| 32°F (freeze) | Jan 16 | Dec 19 |
| 28°F (hard freeze) | Jan 2 | Dec 29 |
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 92227
Dates count from your average last spring frost (Jan 16) and first fall frost (Dec 19). 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 | Nov 21–Dec 5 | Jan 23–Feb 6 (transplant) | Aug 22–Sep 19 (transplant) |
| Pepper (sweet and hot) | Nov 7–21 | Jan 30–Feb 13 (transplant) | Aug 29–Sep 19 (transplant) |
| Eggplant | Nov 7–21 | Jan 30–Feb 13 (transplant) | Aug 29–Sep 19 (transplant) |
| Tomatillo | Nov 21–Dec 5 | Jan 23–Feb 6 (transplant) | – |
| Lettuce | Nov 21–Dec 5 | Dec 26–Jan 16 (transplant) Dec 19–Jan 30 (sow outdoors) | Oct 24–Nov 14 (transplant) Oct 10–Nov 7 (sowing) |
| Spinach | – | Dec 5–26 (sow outdoors) | Oct 24–Nov 14 (sowing) |
| Kale | Nov 21–Dec 5 | Dec 19–Jan 2 (transplant) Dec 19–Jan 2 (sow outdoors) | Sep 26–Oct 24 (transplant) Sep 12–Oct 10 (sowing) |
| Collards | Nov 21–Dec 5 | Dec 19–Jan 16 (transplant) Dec 19–Jan 16 (sow outdoors) | Sep 26–Oct 24 (transplant) Sep 12–Oct 10 (sowing) |
| Broccoli | Nov 7–21 | Dec 19–Jan 2 (transplant) | Sep 12–Oct 10 (transplant) |
| Cabbage | Nov 7–21 | Dec 19–Jan 2 (transplant) | Sep 12–Oct 10 (transplant) |
| Cauliflower | Nov 7–21 | Jan 2–16 (transplant) | Sep 12–Oct 10 (transplant) |
| Brussels sprouts | Oct 24–Nov 7 | Dec 19–Jan 2 (transplant) | Aug 29–Sep 19 (transplant) |
| Kohlrabi | Nov 21–Dec 5 | Dec 19–Jan 2 (transplant) Dec 19–Jan 2 (sow outdoors) | Oct 10–24 (sowing) |
| Bok choy / Asian greens | – | Dec 19–Jan 2 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Arugula | – | Dec 19–Jan 16 (sow outdoors) | Oct 24–Nov 21 (sowing) |
| Mustard greens | – | Dec 19–Jan 9 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Swiss chard | Dec 5–19 | Jan 2–23 (transplant) Jan 2–30 (sow outdoors) | Oct 10–24 (sowing) |
| Beet | – | Dec 19–Jan 16 (sow outdoors) | Oct 10–24 (sowing) |
| Carrot | – | Dec 26–Jan 23 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Radish | – | Dec 12–Jan 23 (sow outdoors) | Nov 7–21 (sowing) |
| Turnip | – | Dec 19–Jan 9 (sow outdoors) | Oct 10–24 (sowing) |
| Parsnip | – | Dec 26–Jan 16 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Nov 21–Dec 19 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Onion (bulbing) | Oct 24–Nov 7 | Dec 5–19 (transplant) | – |
| Green onion / scallion | – | Dec 5–Jan 2 (sow outdoors) | Oct 10–24 (sowing) |
| Leek | Oct 24–Nov 7 | Dec 19–Jan 2 (transplant) | – |
| Garlic | – | – | Nov 7–Dec 5 (sowing) |
| Shallot | – | Dec 5–19 (transplant) | Nov 7–Dec 5 (sowing) |
| Potato | – | Dec 19–Jan 2 (transplant) | Aug 29–Sep 12 (transplant) |
| Sweet potato | – | Feb 6–20 (transplant) | – |
| Sweet corn | – | Jan 23–Feb 6 (sow outdoors) | – |
| Bean, bush (snap) | – | Jan 23–Feb 6 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Bean, pole | – | Jan 23–Feb 6 (sow outdoors) | – |
| Lima bean | – | Jan 30–Feb 13 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Feb 6–27 (sow outdoors) | – |
| Cucumber | Dec 19–26 | Jan 23–Feb 6 (transplant) Jan 23–Feb 6 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Summer squash / zucchini | Dec 19–26 | Jan 23–Feb 6 (transplant) Jan 23–Feb 6 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Winter squash | Dec 19–26 | Jan 23–Feb 6 (transplant) Jan 23–Feb 6 (sow outdoors) | – |
| Pumpkin | – | Jan 23–Feb 6 (sow outdoors) | – |
| Watermelon | Dec 19–26 | Jan 30–Feb 13 (transplant) Jan 30–Feb 13 (sow outdoors) | – |
| Cantaloupe / muskmelon | Dec 19–26 | Jan 30–Feb 13 (transplant) Jan 30–Feb 13 (sow outdoors) | – |
| Okra | Dec 5–19 | Jan 30–Feb 13 (transplant) Jan 30–Feb 13 (sow outdoors) | – |
| Celery | Oct 24–Nov 7 | Jan 23–30 (transplant) | – |
| Basil | Dec 5–19 | Jan 23–Feb 6 (transplant) Jan 23–Feb 6 (sow outdoors) | – |
| Cilantro | – | Jan 2–30 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Parsley | Nov 7–21 | Jan 2–16 (transplant) Dec 26–Jan 16 (sow outdoors) | – |
| Dill | – | Jan 16–30 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Sunflower | – | Jan 16–30 (sow outdoors) | – |
| Asparagus (crowns) | – | Dec 19–Jan 2 (transplant) | – |
| Rhubarb (crowns) | – | Dec 19–Jan 2 (transplant) | – |
| Strawberry (plants) | – | Dec 19–Jan 2 (transplant) | Oct 10–Nov 7 (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: Brawley 2 SW, CA (NOAA GHCN-Daily ID USC00041048), elevation -100 ft, 13.0 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Imperial, CA | 17 mi | Jan 4 | Dec 26 |
| Imperial Co AP, CA | 18 mi | Jan 14 | Dec 24 |
| El Centro 2 SSW, CA | 20 mi | Jan 3 | Dec 27 |
The average last-frost dates of these stations span 13 days, a rough guide to local variation. See data sources & methods.
Frost questions for 92227
When is the last frost in 92227?
The average (50% chance) last spring freeze of 32°F for ZIP 92227 is January 16. For a more cautious planting date, use February 17, when only 1 year in 10 still sees a later freeze.
When is the first frost in 92227?
The average first fall freeze is December 19. In 1 year in 10 it comes by December 2.
What hardiness zone is 92227?
ZIP 92227 is in USDA zone 10a (30 to 35°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 92227 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
92233 Calipatria 92281 Westmorland 92250 Holtville 92249 Heber 92243 El Centro 92251 Imperial 92273 Seeley 92231 Calexico
Other ZIP codes in Imperial County
92222 92231 92233 92243 92249 92250 92251 92257 92259 92266 92273 92275 92281 92283 All Imperial 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.