Frost dates for 91732El Monte, CA
Frost occurs in about 15% of years near El Monte, based on NOAA 1991-2020 records for the San Gabriel Fire Dept, CA station.
Frost occurs in about 15% 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 20 · Jan 17 · Feb 20 | Dec 6 · Dec 26 · Jan 30 | 346 days | 75% |
| Frost / freeze (32°F) | Dec 19 · Jan 4 · Jan 28 | Dec 18 · Jan 2 · Jan 26 | 365 days | 15% |
| Hard freeze (28°F) | — | — | 365 days | 0% |
Where these dates come from
ZIP code 91732 is matched to the NOAA station San Gabriel Fire Dept, CA, 8 km away, at 363 ft elevation (61 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| San Gabriel Fire Dept, CA (used) | 363 ft | Jan 4 | Jan 2 |
| Pasadena, CA | 864 ft | Jan 8 | Jan 7 |
| Mt Wilson Cbs, CA | 5,710 ft | Apr 28 | Nov 15 |
| Los Angeles Dwtn Usc Campus, CA | 230 ft | — | — |
Frost dates near El Monte
- El Monte, CA 91734 · last Jan 4, first Jan 2
- South El Monte, CA 91733 · last Jan 4, first Jan 2
- La Puente, CA 91746 · last Jan 4, first Jan 2
- Temple City, CA 91780 · last Jan 4, first Jan 2
- Baldwin Park, CA 91706 · last Jan 4, first Jan 2
- Rosemead, CA 91771 · last Jan 4, first Jan 2
- Arcadia, CA 91007 · last Jan 4, first Jan 2
- West Covina, CA 91793 · last Jan 4, first Jan 2
Frequently asked questions
- When is the last frost in El Monte, CA?
- Frost occurs in about 15% of years at the nearest NOAA station (San Gabriel Fire Dept, CA), so there is no reliable average last frost date.
- When is the first frost in El Monte, CA?
- Frost occurs in about 15% 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.