Frost dates for 92103San Diego, CA
Frost occurs in about 6% of years near San Diego, based on NOAA 1991-2020 records for the San Diego Montgomery Fld, CA station.
Frost occurs in about 6% of years. Frost-tender plants can usually grow year-round, but cover them if a rare cold snap is forecast.
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Dec 13 · Jan 8 · Feb 14 | Dec 1 · Dec 25 · Jan 30 | 357 days | 64% |
| Frost / freeze (32°F) | — | — | 365 days | 6% |
| Hard freeze (28°F) | — | — | 365 days | 0% |
Where these dates come from
ZIP code 92103 is matched to the NOAA station San Diego Montgomery Fld, CA, 8 km away, at 417 ft elevation (132 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| San Diego Montgomery Fld, CA (used) | 417 ft | — | — |
| San Diego Lindbergh Fld, CA | 15 ft | — | — |
| North Island Nas, CA | 26 ft | — | — |
| San Diego Seaworld, CA | 14 ft | — | — |
Frost dates near San Diego
- San Diego, CA 92199 · last —, first —
- Coronado, CA 92178 · last —, first —
- National City, CA 91951 · last —, first —
- Lemon Grove, CA 91945 · last —, first —
- La Mesa, CA 91943 · last Jan 6, first Dec 21
- La Jolla, CA 92037 · last —, first —
- Chula Vista, CA 91909 · last —, first —
- Spring Valley, CA 91976 · last Jan 6, first Dec 21
Frequently asked questions
- When is the last frost in San Diego, CA?
- Frost occurs in about 6% of years at the nearest NOAA station (San Diego Montgomery Fld, CA), so there is no reliable average last frost date.
- When is the first frost in San Diego, CA?
- Frost occurs in about 6% of years at the nearest NOAA station.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.