Fall in zone 10aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 92881 (Corona, 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, Chino AP, CA (11 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 85% of years (about 11 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 1750% 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
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
77°F 55°F or warmer
24-hour average · latest 73°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Fallbrook 5 NE (34 mi).
4-inch depth
78°F 55°F or warmer
24-hour average · latest 76°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Fallbrook 5 NE (34 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 92881 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 78°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 4 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 8–22
- Eggplant: start seeds indoors Nov 8–22
- Lettuce: fall transplant Oct 24–Nov 14
- Spinach: fall sowing Oct 24–Nov 14
- Broccoli: start seeds indoors Nov 8–22
- Cabbage: start seeds indoors Nov 8–22
- Cauliflower: start seeds indoors Nov 8–22
- Brussels sprouts: start seeds indoors Oct 25–Nov 8
- 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 18 (prior Dec) |
| 50% (the "average" last frost) | Jan 17 |
| 10% (cautious: only 1 year in 10 freezes later) | Feb 22 |
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 27 |
| 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 24 | Dec 1 |
| 32°F (freeze) | Jan 17 | Dec 19 |
| 28°F (hard freeze) | Jan 3 | Dec 30 |
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 92881
Dates count from your average last spring frost (Jan 17) 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 22–Dec 6 | Jan 24–Feb 7 (transplant) | Aug 22–Sep 19 (transplant) |
| Pepper (sweet and hot) | Nov 8–22 | Jan 31–Feb 14 (transplant) | Aug 29–Sep 19 (transplant) |
| Eggplant | Nov 8–22 | Jan 31–Feb 14 (transplant) | Aug 29–Sep 19 (transplant) |
| Tomatillo | Nov 22–Dec 6 | Jan 24–Feb 7 (transplant) | – |
| Lettuce | Nov 22–Dec 6 | Dec 27–Jan 17 (transplant) Dec 20–Jan 31 (sow outdoors) | Oct 24–Nov 14 (transplant) Oct 10–Nov 7 (sowing) |
| Spinach | – | Dec 6–27 (sow outdoors) | Oct 24–Nov 14 (sowing) |
| Kale | Nov 22–Dec 6 | Dec 20–Jan 3 (transplant) Dec 20–Jan 3 (sow outdoors) | Sep 26–Oct 24 (transplant) Sep 12–Oct 10 (sowing) |
| Collards | Nov 22–Dec 6 | Dec 20–Jan 17 (transplant) Dec 20–Jan 17 (sow outdoors) | Sep 26–Oct 24 (transplant) Sep 12–Oct 10 (sowing) |
| Broccoli | Nov 8–22 | Dec 20–Jan 3 (transplant) | Sep 12–Oct 10 (transplant) |
| Cabbage | Nov 8–22 | Dec 20–Jan 3 (transplant) | Sep 12–Oct 10 (transplant) |
| Cauliflower | Nov 8–22 | Jan 3–17 (transplant) | Sep 12–Oct 10 (transplant) |
| Brussels sprouts | Oct 25–Nov 8 | Dec 20–Jan 3 (transplant) | Aug 29–Sep 19 (transplant) |
| Kohlrabi | Nov 22–Dec 6 | Dec 20–Jan 3 (transplant) Dec 20–Jan 3 (sow outdoors) | Oct 10–24 (sowing) |
| Bok choy / Asian greens | – | Dec 20–Jan 3 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Arugula | – | Dec 20–Jan 17 (sow outdoors) | Oct 24–Nov 21 (sowing) |
| Mustard greens | – | Dec 20–Jan 10 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Swiss chard | Dec 6–20 | Jan 3–24 (transplant) Jan 3–31 (sow outdoors) | Oct 10–24 (sowing) |
| Beet | – | Dec 20–Jan 17 (sow outdoors) | Oct 10–24 (sowing) |
| Carrot | – | Dec 27–Jan 24 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Radish | – | Dec 13–Jan 24 (sow outdoors) | Nov 7–21 (sowing) |
| Turnip | – | Dec 20–Jan 10 (sow outdoors) | Oct 10–24 (sowing) |
| Parsnip | – | Dec 27–Jan 17 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Nov 22–Dec 20 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Onion (bulbing) | Oct 25–Nov 8 | Dec 6–20 (transplant) | – |
| Green onion / scallion | – | Dec 6–Jan 3 (sow outdoors) | Oct 10–24 (sowing) |
| Leek | Oct 25–Nov 8 | Dec 20–Jan 3 (transplant) | – |
| Garlic | – | – | Nov 7–Dec 5 (sowing) |
| Shallot | – | Dec 6–20 (transplant) | Nov 7–Dec 5 (sowing) |
| Potato | – | Dec 20–Jan 3 (transplant) | Aug 29–Sep 12 (transplant) |
| Sweet potato | – | Feb 7–21 (transplant) | – |
| Sweet corn | – | Jan 24–Feb 7 (sow outdoors) | – |
| Bean, bush (snap) | – | Jan 24–Feb 7 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Bean, pole | – | Jan 24–Feb 7 (sow outdoors) | – |
| Lima bean | – | Jan 31–Feb 14 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Feb 7–28 (sow outdoors) | – |
| Cucumber | Dec 20–27 | Jan 24–Feb 7 (transplant) Jan 24–Feb 7 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Summer squash / zucchini | Dec 20–27 | Jan 24–Feb 7 (transplant) Jan 24–Feb 7 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Winter squash | Dec 20–27 | Jan 24–Feb 7 (transplant) Jan 24–Feb 7 (sow outdoors) | – |
| Pumpkin | – | Jan 24–Feb 7 (sow outdoors) | – |
| Watermelon | Dec 20–27 | Jan 31–Feb 14 (transplant) Jan 31–Feb 14 (sow outdoors) | – |
| Cantaloupe / muskmelon | Dec 20–27 | Jan 31–Feb 14 (transplant) Jan 31–Feb 14 (sow outdoors) | – |
| Okra | Dec 6–20 | Jan 31–Feb 14 (transplant) Jan 31–Feb 14 (sow outdoors) | – |
| Celery | Oct 25–Nov 8 | Jan 24–31 (transplant) | – |
| Basil | Dec 6–20 | Jan 24–Feb 7 (transplant) Jan 24–Feb 7 (sow outdoors) | – |
| Cilantro | – | Jan 3–31 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Parsley | Nov 8–22 | Jan 3–17 (transplant) Dec 27–Jan 17 (sow outdoors) | – |
| Dill | – | Jan 17–31 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Sunflower | – | Jan 17–31 (sow outdoors) | – |
| Asparagus (crowns) | – | Dec 20–Jan 3 (transplant) | – |
| Rhubarb (crowns) | – | Dec 20–Jan 3 (transplant) | – |
| Strawberry (plants) | – | Dec 20–Jan 3 (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: Chino AP, CA (NOAA GHCN-Daily ID USW00003179), elevation 650 ft, 11.1 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Riverside Muni AP, CA | 12 mi | Jan 9 | Dec 30 |
| Tustin Irvine Rch, CA | 13 mi | Jan 5 | Dec 25 |
| Riverside Fire STN 3, CA | 14 mi | Jan 9 | Dec 25 |
The average last-frost dates of these stations span 12 days, a rough guide to local variation. See data sources & methods.
Frost questions for 92881
When is the last frost in 92881?
The average (50% chance) last spring freeze of 32°F for ZIP 92881 is January 17. For a more cautious planting date, use February 22, when only 1 year in 10 still sees a later freeze.
When is the first frost in 92881?
The average first fall freeze is December 19. In 1 year in 10 it comes by November 27.
What hardiness zone is 92881?
ZIP 92881 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 92881 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
92882 Corona 92879 Corona 92676 Silverado 92883 Temescal Valley 92860 Norco 92880 Eastvale 92503 Riverside 92505 Riverside
Other ZIP codes in Riverside County
91752 92201 92203 92210 92211 92220 92223 92225 92230 92234 92236 92239 92240 92241 92253 92254 92258 92260 92262 92264 92270 92274 92276 92282 All Riverside 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.