Frost dates for 93040Piru, CA
Frost occurs in about 37% of years near Piru, based on NOAA 1991-2020 records for the Newhall 5Nw, CA station.
Frost occurs in about 37% 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 21 · Feb 22 · Apr 8 | Nov 23 · Dec 19 · Feb 8 | 306 days | 93% |
| Frost / freeze (32°F) | Dec 8 · Jan 8 · Mar 10 | Nov 30 · Jan 1 · Feb 25 | 365 days | 37% |
| Hard freeze (28°F) | — | — | 365 days | 3% |
Where these dates come from
ZIP code 93040 is matched to the NOAA station Newhall 5Nw, CA, 18.2 km away, at 1,765 ft elevation (322 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Newhall 5Nw, CA (used) | 1,765 ft | Jan 8 | Jan 1 |
| Northridge Cal State, CA | 904 ft | Jan 2 | Jan 1 |
| Woodland Hills Pierce College, CA | 790 ft | Jan 24 | Dec 15 |
| Sandberg, CA | 4,510 ft | Apr 15 | Nov 26 |
Frost dates near Piru
- Fillmore, CA 93015 · last Mar 21, first Nov 15
- Castaic, CA 91384 · last Jan 8, first Jan 1
- Valencia, CA 91385 · last Jan 8, first Jan 1
- Stevenson Ranch, CA 91381 · last Jan 8, first Jan 1
- Simi Valley, CA 93063 · last Jan 8, first Jan 1
- Moorpark, CA 93020 · last Dec 31, first Dec 28
- Brandeis, CA 93064 · last Jan 24, first Dec 15
- Santa Clarita, CA 91380 · last Jan 8, first Jan 1
Frequently asked questions
- When is the last frost in Piru, CA?
- Frost occurs in about 37% of years at the nearest NOAA station (Newhall 5Nw, CA), so there is no reliable average last frost date.
- When is the first frost in Piru, CA?
- Frost occurs in about 37% 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.