Frost dates for 92583 — San Jacinto, CA
Frost is light and occasional here — typically a few cold nights around midwinter (about 15 a year). Cover tender plants when frost is forecast.
How San Jacinto compares
- In a typical year, frost nights in San Jacinto fall between December 10 and January 31. In 1 year in 10 the first frost comes as early as November 22, or the last frost as late as February 28.
- San Jacinto shares its weather station with Hemet, CA, 7 km away, so the two have the same frost dates.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 31 |
| 50% (median) | January 31 |
| 10% (safe for tender plants) | February 28 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 22 |
| 50% (median) | December 10 |
| 90% (late) | January 6 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for San Jacinto, CA
Frost dates for 92583 — San Jacinto, CA — last frost Jan 31, first frost Dec 10, zone 9b. whenisthelastfrost.com
In mild climates, summer heat limits many crops as much as frost does. Use this calendar for spring planting and lean on fall and winter for cool-season crops.
When to plant vegetables in San Jacinto, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 8 – Nov 22 | Jan 3 – Jan 17 | — | — |
| Peppers | Nov 22 – Dec 6 | Feb 14 – Feb 28 | — | — |
| Eggplant | Nov 22 – Dec 6 | Feb 14 – Feb 28 | — | — |
| Tomatoes | Dec 6 – Dec 20 | Feb 7 – Feb 21 | — | — |
| Lettuce | Dec 6 – Dec 20 | Jan 10 – Jan 24 | Jan 3 – Feb 7 | Oct 15 – Nov 12 |
| Kale | Dec 6 – Dec 20 | Jan 3 – Jan 17 | Jan 3 – Jan 17 | Oct 1 – Oct 22 |
| Broccoli | Dec 6 – Dec 20 | Jan 17 – Jan 31 | — | Sep 3 – Sep 24 |
| Cabbage | Dec 6 – Dec 20 | Jan 10 – Jan 24 | — | Sep 3 – Sep 24 |
| Cauliflower | Dec 6 – Dec 20 | Jan 17 – Jan 31 | — | Sep 3 – Sep 24 |
| Okra | Dec 20 – Jan 3 | Feb 21 – Mar 7 | Feb 21 – Mar 7 | — |
| Basil | Dec 20 – Jan 3 | Feb 7 – Feb 21 | — | — |
| Peas | — | — | Dec 20 – Jan 10 | Sep 17 – Oct 8 |
| Spinach | — | — | Dec 20 – Jan 10 | Oct 15 – Nov 5 |
| Radishes | — | — | Dec 27 – Feb 7 | Oct 29 – Nov 19 |
| Cucumbers | Jan 3 – Jan 10 | Feb 14 – Feb 21 | Feb 7 – Feb 21 | Sep 24 – Oct 8 |
| Zucchini & Summer Squash | Jan 3 – Jan 10 | — | Feb 7 – Feb 21 | Oct 1 – Oct 15 |
| Winter Squash & Pumpkins | Jan 3 – Jan 10 | — | Feb 7 – Feb 21 | — |
| Melons & Watermelon | Jan 3 – Jan 10 | Feb 14 – Feb 28 | — | — |
| Carrots | — | — | Jan 10 – Feb 7 | Sep 17 – Oct 1 |
| Beets | — | — | Jan 10 – Feb 7 | Oct 1 – Oct 15 |
| Potatoes | — | — | Jan 10 – Jan 31 | — |
| Swiss Chard | — | — | Jan 17 – Feb 14 | Oct 1 – Oct 15 |
| Cilantro | — | — | Jan 17 – Feb 7 | Oct 15 – Nov 5 |
| Green Beans | — | — | Feb 7 – Feb 28 | Sep 24 – Oct 8 |
| Sweet Corn | — | — | Feb 7 – Feb 21 | — |
| Sweet Potatoes | — | Feb 14 – Mar 7 | — | — |
| Garlic | — | — | — | Nov 26 – Dec 31 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the San Jacinto, CA weather station, 4 km away (elevation 1,526 ft (465 m)).
ZIP codes in San Jacinto: 92581 92582 92583
Frost dates near San Jacinto
- Hemet Jan 31 · Dec 10
- Banning Jan 31 · Dec 10
- Nuevo Jan 31 · Dec 10
- Beaumont Jan 31 · Dec 10
- Homeland Jan 31 · Dec 10
- Cabazon May 16 · Oct 24
- Mountain Center May 16 · Oct 24
- Idyllwild May 16 · Oct 24
Frequently asked questions
When is the last frost in San Jacinto, CA?
The median last spring frost in San Jacinto, CA is January 31. There is still about a 10% chance of frost after February 28, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in San Jacinto, CA?
The median first fall frost is December 10, with about a 10% chance of frost before November 22.
How long is the growing season in San Jacinto, CA?
About 313 days between the median last spring frost and first fall frost.
What planting zone is San Jacinto, CA?
San Jacinto, CA is in USDA hardiness zone 9b.