When is the last frost in Saint Simons Island, GA?

For ZIP code 31522, the average last spring frost (32°F) is February 9, based on NOAA 1991-2020 climate normals for the Brunswick Malcolm Mckinnon Ap, GA weather station. There is a 1-in-10 chance of a frost after March 6.

When is the first frost in Saint Simons Island, GA?

The average first fall frost (32°F) is December 26. There is a 1-in-10 chance of frost by November 30, so tender plants are at risk from that point on.

How long is the growing season in 31522?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 312 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 31522Saint Simons Island, GA

The average last spring frost in Saint Simons Island is February 9 and the average first fall frost is December 26, giving a typical growing season of about 312 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Feb 9
Average first fall frost: Dec 26
Growing season: 312 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)	Feb 1 · Feb 27 · Mar 18	Nov 16 · Dec 4 · Jan 1	282 days	100%
Frost / freeze (32°F)	Jan 11 · Feb 9 · Mar 6	Nov 30 · Dec 26 · Jan 19	312 days	98%
Hard freeze (28°F)	Dec 30 · Jan 27 · Feb 26	Dec 13 · Jan 8 · Feb 7	341 days	74%

Where these dates come from

ZIP code 31522 is matched to the NOAA station Brunswick Malcolm Mckinnon Ap, GA, 9.5 km away, at 16 ft elevation (13 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Brunswick Malcolm Mckinnon Ap, GA (used)	16 ft	Feb 9	Dec 26
Brunswick, GA	13 ft	Feb 8	Dec 25
Sapelo Is, GA	10 ft	Feb 20	Dec 19
Woodbine, GA	16 ft	Mar 14	Nov 25

Frost dates near Saint Simons Island

Sea Island, GA 31561 · last Feb 9, first Dec 26
Brunswick, GA 31524 · last Feb 8, first Dec 25
Jekyll Island, GA 31527 · last Feb 9, first Dec 26
Darien, GA 31305 · last Feb 20, first Dec 19
Sapelo Island, GA 31327 · last Feb 20, first Dec 19
Meridian, GA 31319 · last Feb 20, first Dec 19
Waverly, GA 31565 · last Feb 8, first Dec 25
Crescent, GA 31304 · last Feb 20, first Dec 19

Frequently asked questions

When is the last frost in Saint Simons Island, GA?: For ZIP code 31522, the average last spring frost (32°F) is February 9, based on NOAA 1991-2020 climate normals for the Brunswick Malcolm Mckinnon Ap, GA weather station. There is a 1-in-10 chance of a frost after March 6.
When is the first frost in Saint Simons Island, GA?: The average first fall frost (32°F) is December 26. There is a 1-in-10 chance of frost by November 30, so tender plants are at risk from that point on.
How long is the growing season in 31522?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 312 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.