When to plant in San Jacinto, CA
Planting dates worked out from San Jacinto's own frost records, not a generic zone chart.
Safe to plant out
Mar 12
1 year in 10 has a later frost
Average last frost
Feb 15
about a 50% chance of a later one
Average first fall frost
Dec 12
1 year in 10 by Nov 24
Frost-free days
310
median, 1991–2020
Station used: San Jacinto · 2.1 km away · station 465 m, town 477 m. How we match towns to stations
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Jan 15 – Jan 29 | Mar 12 – Mar 26 | May 6 |
| Sweet pepper | Jan 1 – Jan 15 | Mar 12 – Mar 26 | May 11 |
| Lettuce (leaf) | Dec 14 – Dec 21 | Jan 18 – Feb 1 | Feb 27 |
| Peas | — | Jan 4 – Feb 1 | Feb 28 |
| Bush beans | — | Mar 5 – Mar 26 | Apr 24 |
| Carrot | — | Jan 25 – Mar 8 | Mar 26 |
| Beet | — | Jan 18 – Mar 1 | Mar 9 |
| Potato | — | Jan 25 – Feb 15 | Apr 5 |
| Kale | Dec 7 – Dec 21 | Jan 18 – Feb 1 | Mar 2 |
| Broccoli | Dec 7 – Dec 21 | Jan 18 – Feb 8 | Mar 19 |
| Cucumber | Feb 12 – Feb 19 | Mar 12 – Mar 26 | May 1 |
| Summer squash and zucchini | Feb 12 – Feb 19 | Mar 12 – Mar 26 | Apr 26 |
| Winter squash | Feb 12 – Feb 19 | Mar 12 – Mar 26 | May 31 |
| Sweet corn | — | Mar 5 – Mar 26 | May 4 |
| Onion (from sets) | — | Jan 18 – Feb 8 | Apr 18 |
| Garlic | — | Nov 28 – Dec 26 (fall) | following summer |
| Spinach | — | Jan 4 – Feb 1 | Feb 11 |
| Basil | Jan 29 – Feb 12 | Mar 12 – Mar 26 | May 8 |
San Jacinto's weather over time
How the growing season has shifted here, year by year, from the station's own records.
Each year's last spring frostLong-term trend
See the data as a table
| Year | Last spring frost |
|---|---|
| 1981 | Feb 27 |
| 1982 | Apr 1 |
| 1983 | Apr 6 |
| 1984 | Feb 27 |
| 1985 | Mar 29 |
| 1986 | Feb 17 |
| 1987 | Feb 28 |
| 1991 | Mar 26 |
| 1993 | Jan 24 |
| 1994 | Feb 14 |
| 1997 | Mar 3 |
| 1999 | Apr 10 |
| 2000 | Mar 6 |
| 2007 | Mar 3 |
| 2009 | Feb 11 |
| 2011 | Feb 28 |
| 2012 | Jan 19 |
| 2013 | Feb 26 |
| 2014 | Feb 2 |
| 2015 | Jan 4 |
| 2016 | Feb 2 |
| 2018 | Feb 25 |
| 2019 | Feb 23 |
| 2020 | Feb 5 |
| 2022 | Feb 25 |
| 2023 | Feb 16 |
| 2024 | Jan 9 |
| 2025 | Jan 13 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1982 | 227 |
| 1984 | 266 |
| 1986 | 297 |
| 1987 | 270 |
| 1991 | 248 |
| 1994 | 261 |
| 2000 | 250 |
| 2007 | 281 |
| 2009 | 314 |
| 2011 | 278 |
| 2012 | 334 |
| 2013 | 285 |
| 2014 | 326 |
| 2015 | 344 |
| 2016 | 318 |
| 2017 | 354 |
| 2018 | 306 |
| 2019 | 310 |
| 2020 | 328 |
| 2021 | 348 |
| 2022 | 308 |
| 2023 | 317 |
| 2024 | 355 |
| 2025 | 351 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1984 | 23.6 °C |
| 1985 | 22.4 °C |
| 1991 | 21.9 °C |
| 1994 | 22.9 °C |
| 1997 | 23.0 °C |
| 1999 | 21.4 °C |
| 2000 | 23.2 °C |
| 2007 | 23.7 °C |
| 2009 | 23.4 °C |
| 2010 | 21.7 °C |
| 2011 | 22.2 °C |
| 2012 | 24.1 °C |
| 2013 | 23.8 °C |
| 2014 | 23.8 °C |
| 2015 | 23.2 °C |
| 2016 | 23.2 °C |
| 2017 | 23.9 °C |
| 2018 | 24.0 °C |
| 2019 | 22.8 °C |
| 2020 | 24.0 °C |
| 2021 | 24.1 °C |
| 2022 | 24.6 °C |
| 2023 | 22.7 °C |
| 2024 | 23.9 °C |
| 2025 | 23.3 °C |
| 2026 | 24.1 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from San Jacinto (NOAA GHCN-Daily). Years with too many missing days are left out.