Jacumba, CA frost dates
Last spring frostApr 29median date
First fall frostNov 1median date
Growing season186 daysfrost-free
Hardiness zone9bZone 9b
How Jacumba compares
- In 8 years out of 10, the last spring frost in Jacumba falls between April 7 and June 1, a 55-day window. The first fall frost falls between October 5 and November 23.
- The median last frost is 29 days later than the California median of Mar 31.
- Its 186-day growing season is longer than 28% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is 68 days later than the zone 9b median of Feb 20. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9b chart.
- The weather station records an average of 68 nights a year at or below 32°F.
- Nearby El Cajon, CA, 72 km away, gets only light, occasional frost, a reminder of how much elevation and distance from the coast matter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 7 |
| 50% (median) | April 29 |
| 10% (safe for tender plants) | June 1 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 5 |
| 50% (median) | November 1 |
| 90% (late) | November 23 |
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 Jacumba, CA
Jacumba, CA frost dates — last frost Apr 29, first frost Nov 1, zone 9b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 4 to Feb 18Transplant outside: Apr 1 to Apr 15
Start indoors: Feb 18 to Mar 4Transplant outside: May 13 to May 27
Start indoors: Feb 18 to Mar 4Transplant outside: May 13 to May 27
Start indoors: Mar 4 to Mar 18Transplant outside: May 6 to May 20
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 8 to Apr 22Sow outdoors: Apr 1 to May 6Plant for fall: Sep 6 to Oct 4
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 1 to Apr 15Sow outdoors: Apr 1 to Apr 15Plant for fall: Aug 23 to Sep 13
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 15 to Apr 29Plant for fall: Jul 26 to Aug 16
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 8 to Apr 22Plant for fall: Jul 26 to Aug 16
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 15 to Apr 29Plant for fall: Jul 26 to Aug 16
Start indoors: Mar 18 to Apr 1Transplant outside: May 20 to Jun 3Sow outdoors: May 20 to Jun 3
Start indoors: Mar 18 to Apr 1Transplant outside: May 6 to May 20
Sow outdoors: Mar 18 to Apr 8Plant for fall: Aug 9 to Aug 30
Sow outdoors: Mar 18 to Apr 8Plant for fall: Sep 6 to Sep 27
Sow outdoors: Mar 25 to May 6Plant for fall: Sep 20 to Oct 11
Start indoors: Apr 1 to Apr 8Transplant outside: May 13 to May 20Sow outdoors: May 6 to May 20Plant for fall: Aug 16 to Aug 30
Start indoors: Apr 1 to Apr 8Sow outdoors: May 6 to May 20Plant for fall: Aug 23 to Sep 6
Start indoors: Apr 1 to Apr 8Sow outdoors: May 6 to May 20
Start indoors: Apr 1 to Apr 8Transplant outside: May 13 to May 27
Sow outdoors: Apr 8 to May 6Plant for fall: Aug 9 to Aug 23
Sow outdoors: Apr 8 to May 6Plant for fall: Aug 23 to Sep 6
Sow outdoors: Apr 8 to Apr 29
Sow outdoors: Apr 15 to May 13Plant for fall: Aug 23 to Sep 6
Sow outdoors: Apr 15 to May 6Plant for fall: Sep 6 to Sep 27
Sow outdoors: May 6 to May 27Plant for fall: Aug 16 to Aug 30
Sow outdoors: May 6 to May 20
Transplant outside: May 13 to Jun 3
Plant for fall: Oct 18 to Nov 22
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Jacumba, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 4 – Feb 18 | Apr 1 – Apr 15 | — | — |
| Peppers | Feb 18 – Mar 4 | May 13 – May 27 | — | — |
| Eggplant | Feb 18 – Mar 4 | May 13 – May 27 | — | — |
| Tomatoes | Mar 4 – Mar 18 | May 6 – May 20 | — | — |
| Lettuce | Mar 4 – Mar 18 | Apr 8 – Apr 22 | Apr 1 – May 6 | Sep 6 – Oct 4 |
| Kale | Mar 4 – Mar 18 | Apr 1 – Apr 15 | Apr 1 – Apr 15 | Aug 23 – Sep 13 |
| Broccoli | Mar 4 – Mar 18 | Apr 15 – Apr 29 | — | Jul 26 – Aug 16 |
| Cabbage | Mar 4 – Mar 18 | Apr 8 – Apr 22 | — | Jul 26 – Aug 16 |
| Cauliflower | Mar 4 – Mar 18 | Apr 15 – Apr 29 | — | Jul 26 – Aug 16 |
| Okra | Mar 18 – Apr 1 | May 20 – Jun 3 | May 20 – Jun 3 | — |
| Basil | Mar 18 – Apr 1 | May 6 – May 20 | — | — |
| Peas | — | — | Mar 18 – Apr 8 | Aug 9 – Aug 30 |
| Spinach | — | — | Mar 18 – Apr 8 | Sep 6 – Sep 27 |
| Radishes | — | — | Mar 25 – May 6 | Sep 20 – Oct 11 |
| Cucumbers | Apr 1 – Apr 8 | May 13 – May 20 | May 6 – May 20 | Aug 16 – Aug 30 |
| Zucchini & Summer Squash | Apr 1 – Apr 8 | — | May 6 – May 20 | Aug 23 – Sep 6 |
| Winter Squash & Pumpkins | Apr 1 – Apr 8 | — | May 6 – May 20 | — |
| Melons & Watermelon | Apr 1 – Apr 8 | May 13 – May 27 | — | — |
| Carrots | — | — | Apr 8 – May 6 | Aug 9 – Aug 23 |
| Beets | — | — | Apr 8 – May 6 | Aug 23 – Sep 6 |
| Potatoes | — | — | Apr 8 – Apr 29 | — |
| Swiss Chard | — | — | Apr 15 – May 13 | Aug 23 – Sep 6 |
| Cilantro | — | — | Apr 15 – May 6 | Sep 6 – Sep 27 |
| Green Beans | — | — | May 6 – May 27 | Aug 16 – Aug 30 |
| Sweet Corn | — | — | May 6 – May 20 | — |
| Sweet Potatoes | — | May 13 – Jun 3 | — | — |
| Garlic | — | — | — | Oct 18 – Nov 22 |
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 Campo Asos, CA weather station, 26 km away (elevation 2,641 ft (805 m)).
Frost dates near Jacumba
- Boulevard Apr 29 · Nov 1
- Ocotillo Jan 6 · Dec 21
- Campo Apr 30 · Oct 26
- Mount Laguna Apr 22 · Nov 8
- Pine Valley Apr 22 · Nov 8
- Potrero Apr 30 · Oct 26
- Tecate Apr 30 · Oct 26
- Guatay Apr 22 · Nov 8
- Descanso Apr 19 · Oct 27
- Dulzura Jan 6 · Dec 31
Frequently asked questions
When is the last frost in Jacumba, CA?
The median last spring frost in Jacumba, CA is April 29. There is still about a 10% chance of frost after June 1, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Jacumba, CA?
The median first fall frost is November 1, with about a 10% chance of frost before October 5.
How long is the growing season in Jacumba, CA?
About 186 days between the median last spring frost and first fall frost.
What planting zone is Jacumba, CA?
Jacumba, CA is in USDA hardiness zone 9b.