Ramona, CA frost dates
Last spring frostMar 4median date
First fall frostDec 4median date
Growing season275 daysfrost-free
Hardiness zone9bZone 9b
How Ramona compares
- In 8 years out of 10, the last spring frost in Ramona falls between January 29 and April 10, a 71-day window. The first fall frost falls between November 17 and December 18.
- The median last frost is 27 days earlier than the California median of Mar 31.
- Its 275-day growing season is longer than 75% of the 636 California places with a regular frost season (state median 235 days).
- The last frost is 12 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 28 nights a year at or below 32°F.
- Nearby Poway, CA, 18 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) | January 29 |
| 50% (median) | March 4 |
| 10% (safe for tender plants) | April 10 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 17 |
| 50% (median) | December 4 |
| 90% (late) | December 18 |
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 Ramona, CA
Ramona, CA frost dates — last frost Mar 4, first frost Dec 4, zone 9b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 10 to Dec 24Transplant outside: Feb 4 to Feb 18
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Mar 18 to Apr 1
Start indoors: Dec 24 to Jan 7Start indoors: Dec 24 to Jan 7Transplant outside: Mar 18 to Apr 1
Start indoors: Jan 7 to Jan 21Transplant outside: Mar 11 to Mar 25
Start indoors: Jan 7 to Jan 21Transplant outside: Feb 11 to Feb 25Sow outdoors: Feb 4 to Mar 11Plant for fall: Oct 9 to Nov 6
Start indoors: Jan 7 to Jan 21Transplant outside: Feb 4 to Feb 18Sow outdoors: Feb 4 to Feb 18Plant for fall: Sep 25 to Oct 16
Start indoors: Jan 7 to Jan 21Transplant outside: Feb 18 to Mar 4Plant for fall: Aug 28 to Sep 18
Start indoors: Jan 7 to Jan 21Transplant outside: Feb 11 to Feb 25Plant for fall: Aug 28 to Sep 18
Start indoors: Jan 7 to Jan 21Transplant outside: Feb 18 to Mar 4Plant for fall: Aug 28 to Sep 18
Start indoors: Jan 21 to Feb 4Transplant outside: Mar 25 to Apr 8Sow outdoors: Mar 25 to Apr 8
Start indoors: Jan 21 to Feb 4Transplant outside: Mar 11 to Mar 25
Sow outdoors: Jan 21 to Feb 11Plant for fall: Sep 11 to Oct 2
Sow outdoors: Jan 21 to Feb 11Plant for fall: Oct 9 to Oct 30
Sow outdoors: Jan 28 to Mar 11Plant for fall: Oct 23 to Nov 13
Start indoors: Feb 4 to Feb 11Transplant outside: Mar 18 to Mar 25Sow outdoors: Mar 11 to Mar 25Plant for fall: Sep 18 to Oct 2
Start indoors: Feb 4 to Feb 11Sow outdoors: Mar 11 to Mar 25Plant for fall: Sep 25 to Oct 9
Start indoors: Feb 4 to Feb 11Sow outdoors: Mar 11 to Mar 25
Start indoors: Feb 4 to Feb 11Transplant outside: Mar 18 to Apr 1
Sow outdoors: Feb 11 to Mar 11Plant for fall: Sep 11 to Sep 25
Sow outdoors: Feb 11 to Mar 11Plant for fall: Sep 25 to Oct 9
Sow outdoors: Feb 11 to Mar 4
Sow outdoors: Feb 18 to Mar 18Plant for fall: Sep 25 to Oct 9
Sow outdoors: Feb 18 to Mar 11Plant for fall: Oct 9 to Oct 30
Sow outdoors: Mar 11 to Apr 1Plant for fall: Sep 18 to Oct 2
Sow outdoors: Mar 11 to Mar 25
Transplant outside: Mar 18 to Apr 8
Plant for fall: Nov 20 to Dec 25
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Ramona, CA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 10 – Dec 24 | Feb 4 – Feb 18 | — | — |
| Peppers | Dec 24 – Jan 7 | Mar 18 – Apr 1 | — | — |
| Eggplant | Dec 24 – Jan 7 | Mar 18 – Apr 1 | — | — |
| Tomatoes | Jan 7 – Jan 21 | Mar 11 – Mar 25 | — | — |
| Lettuce | Jan 7 – Jan 21 | Feb 11 – Feb 25 | Feb 4 – Mar 11 | Oct 9 – Nov 6 |
| Kale | Jan 7 – Jan 21 | Feb 4 – Feb 18 | Feb 4 – Feb 18 | Sep 25 – Oct 16 |
| Broccoli | Jan 7 – Jan 21 | Feb 18 – Mar 4 | — | Aug 28 – Sep 18 |
| Cabbage | Jan 7 – Jan 21 | Feb 11 – Feb 25 | — | Aug 28 – Sep 18 |
| Cauliflower | Jan 7 – Jan 21 | Feb 18 – Mar 4 | — | Aug 28 – Sep 18 |
| Okra | Jan 21 – Feb 4 | Mar 25 – Apr 8 | Mar 25 – Apr 8 | — |
| Basil | Jan 21 – Feb 4 | Mar 11 – Mar 25 | — | — |
| Peas | — | — | Jan 21 – Feb 11 | Sep 11 – Oct 2 |
| Spinach | — | — | Jan 21 – Feb 11 | Oct 9 – Oct 30 |
| Radishes | — | — | Jan 28 – Mar 11 | Oct 23 – Nov 13 |
| Cucumbers | Feb 4 – Feb 11 | Mar 18 – Mar 25 | Mar 11 – Mar 25 | Sep 18 – Oct 2 |
| Zucchini & Summer Squash | Feb 4 – Feb 11 | — | Mar 11 – Mar 25 | Sep 25 – Oct 9 |
| Winter Squash & Pumpkins | Feb 4 – Feb 11 | — | Mar 11 – Mar 25 | — |
| Melons & Watermelon | Feb 4 – Feb 11 | Mar 18 – Apr 1 | — | — |
| Carrots | — | — | Feb 11 – Mar 11 | Sep 11 – Sep 25 |
| Beets | — | — | Feb 11 – Mar 11 | Sep 25 – Oct 9 |
| Potatoes | — | — | Feb 11 – Mar 4 | — |
| Swiss Chard | — | — | Feb 18 – Mar 18 | Sep 25 – Oct 9 |
| Cilantro | — | — | Feb 18 – Mar 11 | Oct 9 – Oct 30 |
| Green Beans | — | — | Mar 11 – Apr 1 | Sep 18 – Oct 2 |
| Sweet Corn | — | — | Mar 11 – Mar 25 | — |
| Sweet Potatoes | — | Mar 18 – Apr 8 | — | — |
| Garlic | — | — | — | Nov 20 – Dec 25 |
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 Ramona Fire Dept, CA weather station, 5 km away (elevation 1,470 ft (448 m)).
Frost dates near Ramona
- Poway Jan 5 · Jan 2
- Santa Ysabel Apr 18 · Oct 26
- Lakeside Jan 6 · Dec 21
- Alpine Feb 12 · Dec 24
- Santee Jan 6 · Dec 21
- Escondido Jan 2 · Dec 30
- Rancho Santa Fe Jan 5 · Jan 2
- Julian Mar 27 · Dec 1
- El Cajon Jan 6 · Dec 21
- Valley Center Feb 19 · Dec 1
Frequently asked questions
When is the last frost in Ramona, CA?
The median last spring frost in Ramona, CA is March 4. There is still about a 10% chance of frost after April 10, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Ramona, CA?
The median first fall frost is December 4, with about a 10% chance of frost before November 17.
How long is the growing season in Ramona, CA?
About 275 days between the median last spring frost and first fall frost.
What planting zone is Ramona, CA?
Ramona, CA is in USDA hardiness zone 9b.