When is the last frost in Moss Beach, CA?

Frost occurs in about 20% of years at the nearest NOAA station (Pacifica 4 Sse, CA), so there is no reliable average last frost date.

When is the first frost in Moss Beach, CA?

Frost occurs in about 20% 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.

Frost dates for 94038Moss Beach, CA

Frost occurs in about 20% of years near Moss Beach, based on NOAA 1991-2020 records for the Pacifica 4 Sse, CA station.

Frost occurs in about 20% 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.

Spring dates: chance of a frost AFTER the date. Fall dates: chance of a frost BEFORE the date.
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 24 · Jan 25 · Mar 11	Dec 1 · Jan 4 · Feb 19	350 days	67%
Frost / freeze (32°F)	Dec 23 · Jan 11 · Feb 12	Dec 22 · Jan 10 · Feb 5	365 days	20%
Hard freeze (28°F)	—	—	365 days	5%

Where these dates come from

ZIP code 94038 is matched to the NOAA station Pacifica 4 Sse, CA, 7.4 km away, at 475 ft elevation (226 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Pacifica 4 Sse, CA (used)	475 ft	Jan 11	Jan 10
Half Moon Bay, CA	27 ft	Feb 6	Dec 17
San Francisco Intl Ap, CA	8 ft	Dec 29	Dec 26
San Francisco Oceanside, CA	8 ft	Dec 30	Dec 25

Frost dates near Moss Beach

Montara, CA 94037 · last Feb 6, first Dec 17
El Granada, CA 94018 · last Feb 6, first Dec 17
Half Moon Bay, CA 94019 · last Feb 6, first Dec 17
Pacifica, CA 94044 · last Dec 29, first Dec 26
Millbrae, CA 94030 · last Dec 29, first Dec 26
San Bruno, CA 94066 · last Dec 29, first Dec 26
Burlingame, CA 94010 · last Dec 29, first Dec 26
San Francisco, CA 94128 · last Dec 29, first Dec 26

Frequently asked questions

When is the last frost in Moss Beach, CA?: Frost occurs in about 20% of years at the nearest NOAA station (Pacifica 4 Sse, CA), so there is no reliable average last frost date.
When is the first frost in Moss Beach, CA?: Frost occurs in about 20% 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.