Last frost date in Ramona, CA
The average last frost in Ramona is March 19. By April 10 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about November 23, which leaves 248 frost-free days. An early freeze before November 6 happens one year in ten.
- Safe after (10% risk)
- Apr 10
- Average first frost
- Nov 23
- Frost-free season
- 248 days
- Hard freeze (28°F) ends
- Feb 7
No frost in the next 6 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2253°
- FriOct 2351°
- SatOct 2454°
- SunOct 2555°
- MonOct 2655°
- TueOct 2756°
Planting calendar for Ramona
Windows count forward or back from the average frost dates above. Click a crop for dates across California.
TomatoesMar 26–Apr 9
PumpkinsApr 2–Apr 16
SunflowersMar 19–Apr 9
CucumbersApr 2–Apr 9
CornMar 26–Apr 9
Sweet potatoesApr 9–Apr 23
WatermelonApr 2–Apr 16
Green beansMar 26–Apr 16
ZucchiniMar 26–Apr 9
OkraApr 9–Apr 23
PeppersApr 2–Apr 16
BasilMar 26–Apr 9
Butternut squashMar 26–Apr 9
CantaloupeApr 2–Apr 16
EggplantApr 2–Apr 16
PotatoesFeb 19–Mar 5
OnionsFeb 5–Feb 26
CarrotsFeb 26–Apr 2
LettuceMar 5–Mar 26
BroccoliFeb 19–Mar 5
BeetsFeb 19–Apr 2
PeasFeb 5–Feb 19
CabbageFeb 19–Mar 5
RadishesFeb 12–Mar 26
Brussels sproutsMar 5–Mar 19
SpinachFeb 5–Feb 26
CilantroMar 5–Mar 26
KaleFeb 19–Mar 5
Collard greensFeb 19–Mar 5
TurnipsFeb 19–Mar 5
DillMar 19–Apr 2
CeleryMar 26–Apr 2
CauliflowerMar 5–Mar 19
LeeksMar 5–Mar 19
Swiss chardMar 5–Apr 2
ParsleyMar 5–Mar 26
Tulip bulbsNov 9–Dec 14
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesFeb 19–Mar 5
AsparagusFeb 19–Mar 5Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Feb 15 | Mar 19 | Apr 10 | Nov 6 | Nov 23 | Dec 10 |
| Hard freeze, 28°F | Dec 30 | Feb 7 | Mar 10 | Nov 21 | Dec 10 | Jan 12 |
Read the spring 10% column as the date after which only one year in ten still gets frost. That is the safer date for tomatoes, peppers and basil.
Where these numbers come from
NOAA station Ramona Airport (USW00053120) sits 2.3 miles from the center of Ramona at 1,393 feet. Its averages cover 1991 to 2020. Low spots, valleys and open fields can keep getting frost a week or two after the station stops; city centers and lakeshores usually get less of it.
Questions
When is the last frost in Ramona, CA?
The average last frost date in Ramona is March 19, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 10.
When is the first frost in Ramona?
The first frost in fall usually comes around November 23. One year in ten it arrives before November 6.
How long is the growing season in Ramona?
About 248 days between the average last and first frost.
When should I plant tomatoes in Ramona?
Plant tomato seedlings outside from March 26 to April 9. Start seeds indoors six to eight weeks earlier.
Nearby in California
- PowayJan 5
- EscondidoJan 2
- LakesideJan 6
- SanteeJan 6
- Winter GardensJan 6
- El CajonJan 6
- San MarcosJan 2
- Rancho San DiegoJan 6
- San Diegono frost
- La MesaJan 6
- Encinitasno frost
- Spring ValleyJan 6