When is the last frost in Key Colony Beach, FL?

Frost is extremely rare here at the nearest NOAA station (Marathon Ap, FL), so there is no reliable average last frost date.

When is the first frost in Key Colony Beach, FL?

Frost is extremely rare here 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 33051Key Colony Beach, FL

Frost is extremely rare here near Key Colony Beach, based on NOAA 1991-2020 records for the Marathon Ap, FL station.

Frost is extremely rare here. 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)	—	—	365 days	0%
Frost / freeze (32°F)	—	—	365 days	0%
Hard freeze (28°F)	—	—	365 days	0%

Where these dates come from

ZIP code 33051 is matched to the NOAA station Marathon Ap, FL, 3.2 km away, at 8 ft elevation (5 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Marathon Ap, FL (used)	8 ft	—	—
Curry Hammock Sp, FL	4 ft	—	—
Duck Key, FL	4 ft	—	—
Bahia Honda Sp, FL	2 ft	—	—

Frost dates near Key Colony Beach

Marathon, FL 33050 · last —, first —
Marathon Shores, FL 33052 · last —, first —
Long Key, FL 33001 · last —, first —
Big Pine Key, FL 33043 · last —, first —
Islamorada, FL 33036 · last —, first —
Summerland Key, FL 33042 · last —, first —
Tavernier, FL 33070 · last —, first —
Key Largo, FL 33037 · last —, first —

Frequently asked questions

When is the last frost in Key Colony Beach, FL?: Frost is extremely rare here at the nearest NOAA station (Marathon Ap, FL), so there is no reliable average last frost date.
When is the first frost in Key Colony Beach, FL?: Frost is extremely rare here 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.