When is the last frost in Clewiston, FL?

For ZIP code 33440, the average last spring frost (32°F) is January 23, based on NOAA 1991-2020 climate normals for the Moore Haven Lock 1, FL weather station. There is a 1-in-10 chance of a frost after February 17.

When is the first frost in Clewiston, FL?

The average first fall frost (32°F) is January 11. There is a 1-in-10 chance of frost by December 23, so tender plants are at risk from that point on.

How long is the growing season in 33440?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 361 days long.

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 33440Clewiston, FL

The average last spring frost in Clewiston is January 23 and the average first fall frost is January 11, giving a typical growing season of about 361 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 23
Average first fall frost: Jan 11
Growing season: 361 days

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)	Jan 7 · Feb 4 · Mar 3	Dec 10 · Jan 5 · Feb 3	331 days	89%
Frost / freeze (32°F)	Dec 30 · Jan 23 · Feb 17	Dec 23 · Jan 11 · Feb 7	361 days	54%
Hard freeze (28°F)	Dec 28 · Jan 16 · Feb 9	Dec 24 · Jan 12 · Feb 4	365 days	17%

Where these dates come from

ZIP code 33440 is matched to the NOAA station Moore Haven Lock 1, FL, 19.3 km away, at 35 ft elevation (15 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Moore Haven Lock 1, FL (used)	35 ft	Jan 23	Jan 11
Clewiston #2, FL	18 ft	Jan 27	Jan 13
Devils Garden, FL	26 ft	Jan 25	Jan 13
Belle Glade, FL	20 ft	Jan 27	Jan 16

Frost dates near Clewiston

Lake Harbor, FL 33459 · last —, first —
South Bay, FL 33493 · last Jan 27, first Jan 16
Belle Glade, FL 33430 · last Jan 27, first Jan 16
Moore Haven, FL 33471 · last Jan 27, first Jan 11
Pahokee, FL 33476 · last —, first —
Canal Point, FL 33438 · last —, first —
Palmdale, FL 33944 · last Jan 27, first Jan 11
Labelle, FL 33935 · last Feb 2, first Jan 8

Frequently asked questions

When is the last frost in Clewiston, FL?: For ZIP code 33440, the average last spring frost (32°F) is January 23, based on NOAA 1991-2020 climate normals for the Moore Haven Lock 1, FL weather station. There is a 1-in-10 chance of a frost after February 17.
When is the first frost in Clewiston, FL?: The average first fall frost (32°F) is January 11. There is a 1-in-10 chance of frost by December 23, so tender plants are at risk from that point on.
How long is the growing season in 33440?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 361 days long.
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.