Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 92582 (San Jacinto, 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, San Jacinto, CA (2 miles away).
- Average last spring frostJan 3150% chance of a 32°F freeze after this date
- Average first fall frostDec 1050% chance of a 32°F freeze by this date
- Growing season (frost-free)315 daysmedian, 32°F threshold
- USDA hardiness zone9b25 to 30°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
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 (27 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 (27 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 92582 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 18 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 1–29
- Lettuce: fall transplant Oct 15–Nov 5
- Spinach: fall sowing Oct 15–Nov 5
- Bok choy / Asian greens: fall sowing Oct 15–29
- Arugula: fall sowing Oct 15–Nov 12
- Mustard greens: fall sowing Oct 15–29
- Cilantro: fall sowing Oct 15–29
- Dill: fall sowing Oct 15–29
- Strawberry (plants): fall transplant Oct 1–29
Coming up in the next 3 weeks
- Brussels sprouts: start seeds indoors Nov 8–22
- Radish: fall sowing Oct 29–Nov 12
- Onion (bulbing): start seeds indoors Nov 8–22
- Leek: start seeds indoors Nov 8–22
- Garlic: fall sowing Oct 29–Nov 26
- Shallot: fall sowing Oct 29–Nov 26
- Celery: start seeds indoors Nov 8–22
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Dec 10: 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) | Dec 31 (prior Dec) |
| 50% (the "average" last frost) | Jan 31 |
| 10% (cautious: only 1 year in 10 freezes later) | Feb 28 |
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 22 |
| 50% (the "average" first frost) | Dec 10 |
| 90% (late: most years have frozen by now) | Jan 6 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 5 | Nov 24 |
| 32°F (freeze) | Jan 31 | Dec 10 |
| 28°F (hard freeze) | Jan 3 | Dec 21 |
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 92582
Dates count from your average last spring frost (Jan 31) and first fall frost (Dec 10). 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 6–20 | Feb 7–21 (transplant) | Aug 13–Sep 10 (transplant) |
| Pepper (sweet and hot) | Nov 22–Dec 6 | Feb 14–28 (transplant) | Aug 20–Sep 10 (transplant) |
| Eggplant | Nov 22–Dec 6 | Feb 14–28 (transplant) | Aug 20–Sep 10 (transplant) |
| Tomatillo | Dec 6–20 | Feb 7–21 (transplant) | – |
| Lettuce | Dec 6–20 | Jan 10–31 (transplant) Jan 3–Feb 14 (sow outdoors) | Oct 15–Nov 5 (transplant) Oct 1–29 (sowing) |
| Spinach | – | Dec 20–Jan 10 (sow outdoors) | Oct 15–Nov 5 (sowing) |
| Kale | Dec 6–20 | Jan 3–17 (transplant) Jan 3–17 (sow outdoors) | Sep 17–Oct 15 (transplant) Sep 3–Oct 1 (sowing) |
| Collards | Dec 6–20 | Jan 3–31 (transplant) Jan 3–31 (sow outdoors) | Sep 17–Oct 15 (transplant) Sep 3–Oct 1 (sowing) |
| Broccoli | Nov 22–Dec 6 | Jan 3–17 (transplant) | Sep 3–Oct 1 (transplant) |
| Cabbage | Nov 22–Dec 6 | Jan 3–17 (transplant) | Sep 3–Oct 1 (transplant) |
| Cauliflower | Nov 22–Dec 6 | Jan 17–31 (transplant) | Sep 3–Oct 1 (transplant) |
| Brussels sprouts | Nov 8–22 | Jan 3–17 (transplant) | Aug 20–Sep 10 (transplant) |
| Kohlrabi | Dec 6–20 | Jan 3–17 (transplant) Jan 3–17 (sow outdoors) | Oct 1–15 (sowing) |
| Bok choy / Asian greens | – | Jan 3–17 (sow outdoors) | Oct 15–29 (sowing) |
| Arugula | – | Jan 3–31 (sow outdoors) | Oct 15–Nov 12 (sowing) |
| Mustard greens | – | Jan 3–24 (sow outdoors) | Oct 15–29 (sowing) |
| Swiss chard | Dec 20–Jan 3 | Jan 17–Feb 7 (transplant) Jan 17–Feb 14 (sow outdoors) | Oct 1–15 (sowing) |
| Beet | – | Jan 3–31 (sow outdoors) | Oct 1–15 (sowing) |
| Carrot | – | Jan 10–Feb 7 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Radish | – | Dec 27–Feb 7 (sow outdoors) | Oct 29–Nov 12 (sowing) |
| Turnip | – | Jan 3–24 (sow outdoors) | Oct 1–15 (sowing) |
| Parsnip | – | Jan 10–31 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 6–Jan 3 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Onion (bulbing) | Nov 8–22 | Dec 20–Jan 3 (transplant) | – |
| Green onion / scallion | – | Dec 20–Jan 17 (sow outdoors) | Oct 1–15 (sowing) |
| Leek | Nov 8–22 | Jan 3–17 (transplant) | – |
| Garlic | – | – | Oct 29–Nov 26 (sowing) |
| Shallot | – | Dec 20–Jan 3 (transplant) | Oct 29–Nov 26 (sowing) |
| Potato | – | Jan 3–17 (transplant) | Aug 20–Sep 3 (transplant) |
| Sweet potato | – | Feb 21–Mar 7 (transplant) | – |
| Sweet corn | – | Feb 7–21 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 7–21 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Bean, pole | – | Feb 7–21 (sow outdoors) | – |
| Lima bean | – | Feb 14–28 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Feb 21–Mar 14 (sow outdoors) | – |
| Cucumber | Jan 3–10 | Feb 7–21 (transplant) Feb 7–21 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Summer squash / zucchini | Jan 3–10 | Feb 7–21 (transplant) Feb 7–21 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Winter squash | Jan 3–10 | Feb 7–21 (transplant) Feb 7–21 (sow outdoors) | – |
| Pumpkin | – | Feb 7–21 (sow outdoors) | – |
| Watermelon | Jan 3–10 | Feb 14–28 (transplant) Feb 14–28 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 3–10 | Feb 14–28 (transplant) Feb 14–28 (sow outdoors) | – |
| Okra | Dec 20–Jan 3 | Feb 14–28 (transplant) Feb 14–28 (sow outdoors) | – |
| Celery | Nov 8–22 | Feb 7–14 (transplant) | – |
| Basil | Dec 20–Jan 3 | Feb 7–21 (transplant) Feb 7–21 (sow outdoors) | – |
| Cilantro | – | Jan 17–Feb 14 (sow outdoors) | Oct 15–29 (sowing) |
| Parsley | Nov 22–Dec 6 | Jan 17–31 (transplant) Jan 10–31 (sow outdoors) | – |
| Dill | – | Jan 31–Feb 14 (sow outdoors) | Oct 15–29 (sowing) |
| Sunflower | – | Jan 31–Feb 14 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 3–17 (transplant) | – |
| Rhubarb (crowns) | – | Jan 3–17 (transplant) | – |
| Strawberry (plants) | – | Jan 3–17 (transplant) | Oct 1–29 (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: San Jacinto, CA (NOAA GHCN-Daily ID USC00047813), elevation 1,525 ft, 2.4 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Hemet, CA | 8 mi | Jan 10 | Dec 23 |
| Idyllwild Fire Dept, CA | 18 mi | May 16 | Oct 24 |
| Redlands, CA | 19 mi | Jan 27 | Dec 19 |
The average last-frost dates of these stations span 130 days, a rough guide to local variation. See data sources & methods.
Frost questions for 92582
When is the last frost in 92582?
The average (50% chance) last spring freeze of 32°F for ZIP 92582 is January 31. For a more cautious planting date, use February 28, when only 1 year in 10 still sees a later freeze.
When is the first frost in 92582?
The average first fall freeze is December 10. In 1 year in 10 it comes by November 22.
What hardiness zone is 92582?
ZIP 92582 is in USDA zone 9b (25 to 30°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 92582 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
92567 Nuevo 92583 San Jacinto 92545 Hemet 92548 Homeland 92543 Hemet 92555 Moreno Valley 92223 Beaumont 92596 French Valley
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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- 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.