Fall in zone 10aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 92273 (Seeley, 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, El Centro Naf, CA (1 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 79% of years (about 4 freezing night(s) a year on average). The dates below describe freeze timing for the station's record; in many years there may be no 32°F freeze at all.
- Average last spring frostJan 650% chance of a 32°F freeze after this date
- Average first fall frostDec 2150% chance of a 32°F freeze by this date
- Growing season (frost-free)347 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
Freezes are uncommon here, so frost-based timing is rough. Local extension calendars for frost-free areas use months.
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 92273 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 Feb 21 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 12–Nov 9
- Kale: fall transplant Sep 28–Oct 26
- Collards: fall transplant Sep 28–Oct 26
- Brussels sprouts: start seeds indoors Oct 14–28
- Kohlrabi: fall sowing Oct 12–26
- Swiss chard: fall sowing Oct 12–26
- Beet: fall sowing Oct 12–26
- Turnip: fall sowing Oct 12–26
- Onion (bulbing): start seeds indoors Oct 14–28
- Green onion / scallion: fall sowing Oct 12–26
- Leek: start seeds indoors Oct 14–28
- Celery: start seeds indoors Oct 14–28
- Strawberry (plants): fall transplant Oct 12–Nov 9
Coming up in the next 3 weeks
- Pepper (sweet and hot): start seeds indoors Oct 28–Nov 11
- Eggplant: start seeds indoors Oct 28–Nov 11
- Lettuce: fall transplant Oct 26–Nov 16
- Spinach: fall sowing Oct 26–Nov 16
- Broccoli: start seeds indoors Oct 28–Nov 11
- Cabbage: start seeds indoors Oct 28–Nov 11
- Cauliflower: start seeds indoors Oct 28–Nov 11
- Bok choy / Asian greens: fall sowing Oct 26–Nov 9
- Arugula: fall sowing Oct 26–Nov 23
- Mustard greens: fall sowing Oct 26–Nov 9
- Cilantro: fall sowing Oct 26–Nov 9
- Parsley: start seeds indoors Oct 28–Nov 11
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 14 (prior Dec) |
| 50% (the "average" last frost) | Jan 6 |
| 10% (cautious: only 1 year in 10 freezes later) | Feb 6 |
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 5 |
| 50% (the "average" first frost) | Dec 21 |
| 90% (late: most years have frozen by now) | Jan 12 (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 1 | Dec 8 |
| 32°F (freeze) | Jan 6 | Dec 21 |
| 28°F (hard freeze) | Jan 3 | Dec 31 |
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 92273
Dates count from your average last spring frost (Jan 6) and first fall frost (Dec 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 | Nov 11–25 | Jan 13–27 (transplant) | Aug 24–Sep 21 (transplant) |
| Pepper (sweet and hot) | Oct 28–Nov 11 | Jan 20–Feb 3 (transplant) | Aug 31–Sep 21 (transplant) |
| Eggplant | Oct 28–Nov 11 | Jan 20–Feb 3 (transplant) | Aug 31–Sep 21 (transplant) |
| Tomatillo | Nov 11–25 | Jan 13–27 (transplant) | – |
| Lettuce | Nov 11–25 | Dec 16–Jan 6 (transplant) Dec 9–Jan 20 (sow outdoors) | Oct 26–Nov 16 (transplant) Oct 12–Nov 9 (sowing) |
| Spinach | – | Nov 25–Dec 16 (sow outdoors) | Oct 26–Nov 16 (sowing) |
| Kale | Nov 11–25 | Dec 9–23 (transplant) Dec 9–23 (sow outdoors) | Sep 28–Oct 26 (transplant) Sep 14–Oct 12 (sowing) |
| Collards | Nov 11–25 | Dec 9–Jan 6 (transplant) Dec 9–Jan 6 (sow outdoors) | Sep 28–Oct 26 (transplant) Sep 14–Oct 12 (sowing) |
| Broccoli | Oct 28–Nov 11 | Dec 9–23 (transplant) | Sep 14–Oct 12 (transplant) |
| Cabbage | Oct 28–Nov 11 | Dec 9–23 (transplant) | Sep 14–Oct 12 (transplant) |
| Cauliflower | Oct 28–Nov 11 | Dec 23–Jan 6 (transplant) | Sep 14–Oct 12 (transplant) |
| Brussels sprouts | Oct 14–28 | Dec 9–23 (transplant) | Aug 31–Sep 21 (transplant) |
| Kohlrabi | Nov 11–25 | Dec 9–23 (transplant) Dec 9–23 (sow outdoors) | Oct 12–26 (sowing) |
| Bok choy / Asian greens | – | Dec 9–23 (sow outdoors) | Oct 26–Nov 9 (sowing) |
| Arugula | – | Dec 9–Jan 6 (sow outdoors) | Oct 26–Nov 23 (sowing) |
| Mustard greens | – | Dec 9–30 (sow outdoors) | Oct 26–Nov 9 (sowing) |
| Swiss chard | Nov 25–Dec 9 | Dec 23–Jan 13 (transplant) Dec 23–Jan 20 (sow outdoors) | Oct 12–26 (sowing) |
| Beet | – | Dec 9–Jan 6 (sow outdoors) | Oct 12–26 (sowing) |
| Carrot | – | Dec 16–Jan 13 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Radish | – | Dec 2–Jan 13 (sow outdoors) | Nov 9–23 (sowing) |
| Turnip | – | Dec 9–30 (sow outdoors) | Oct 12–26 (sowing) |
| Parsnip | – | Dec 16–Jan 6 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Nov 11–Dec 9 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Onion (bulbing) | Oct 14–28 | Nov 25–Dec 9 (transplant) | – |
| Green onion / scallion | – | Nov 25–Dec 23 (sow outdoors) | Oct 12–26 (sowing) |
| Leek | Oct 14–28 | Dec 9–23 (transplant) | – |
| Garlic | – | – | Nov 9–Dec 7 (sowing) |
| Shallot | – | Nov 25–Dec 9 (transplant) | Nov 9–Dec 7 (sowing) |
| Potato | – | Dec 9–23 (transplant) | Aug 31–Sep 14 (transplant) |
| Sweet potato | – | Jan 27–Feb 10 (transplant) | – |
| Sweet corn | – | Jan 13–27 (sow outdoors) | – |
| Bean, bush (snap) | – | Jan 13–27 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Bean, pole | – | Jan 13–27 (sow outdoors) | – |
| Lima bean | – | Jan 20–Feb 3 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jan 27–Feb 17 (sow outdoors) | – |
| Cucumber | Dec 9–16 | Jan 13–27 (transplant) Jan 13–27 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Summer squash / zucchini | Dec 9–16 | Jan 13–27 (transplant) Jan 13–27 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Winter squash | Dec 9–16 | Jan 13–27 (transplant) Jan 13–27 (sow outdoors) | – |
| Pumpkin | – | Jan 13–27 (sow outdoors) | – |
| Watermelon | Dec 9–16 | Jan 20–Feb 3 (transplant) Jan 20–Feb 3 (sow outdoors) | – |
| Cantaloupe / muskmelon | Dec 9–16 | Jan 20–Feb 3 (transplant) Jan 20–Feb 3 (sow outdoors) | – |
| Okra | Nov 25–Dec 9 | Jan 20–Feb 3 (transplant) Jan 20–Feb 3 (sow outdoors) | – |
| Celery | Oct 14–28 | Jan 13–20 (transplant) | – |
| Basil | Nov 25–Dec 9 | Jan 13–27 (transplant) Jan 13–27 (sow outdoors) | – |
| Cilantro | – | Dec 23–Jan 20 (sow outdoors) | Oct 26–Nov 9 (sowing) |
| Parsley | Oct 28–Nov 11 | Dec 23–Jan 6 (transplant) Dec 16–Jan 6 (sow outdoors) | – |
| Dill | – | Jan 6–20 (sow outdoors) | Oct 26–Nov 9 (sowing) |
| Sunflower | – | Jan 6–20 (sow outdoors) | – |
| Asparagus (crowns) | – | Dec 9–23 (transplant) | – |
| Rhubarb (crowns) | – | Dec 9–23 (transplant) | – |
| Strawberry (plants) | – | Dec 9–23 (transplant) | Oct 12–Nov 9 (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: El Centro Naf, CA (NOAA GHCN-Daily ID USW00023199), elevation -42 ft, 1.2 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Imperial Co AP, CA | 7 mi | Jan 14 | Dec 24 |
| Imperial, CA | 8 mi | Jan 4 | Dec 26 |
| El Centro 2 SSW, CA | 8 mi | Jan 3 | Dec 27 |
The average last-frost dates of these stations span 11 days, a rough guide to local variation. See data sources & methods.
Frost questions for 92273
When is the last frost in 92273?
The average (50% chance) last spring freeze of 32°F for ZIP 92273 is January 6. For a more cautious planting date, use February 6, when only 1 year in 10 still sees a later freeze.
When is the first frost in 92273?
The average first fall freeze is December 21. In 1 year in 10 it comes by December 5.
What hardiness zone is 92273?
ZIP 92273 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 92273 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
92251 Imperial 92243 El Centro 92231 Calexico 92249 Heber 92259 Ocotillo 92281 Westmorland 92227 Brawley 92233 Calipatria
Other ZIP codes in Imperial County
92222 92227 92231 92233 92243 92249 92250 92251 92257 92259 92266 92275 92281 92283 All Imperial County frost dates · California frost dates
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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.