When is the last frost in Brunswick, GA?

For ZIP code 31521, the average last spring frost (32°F) is February 8, based on NOAA 1991-2020 climate normals for the Brunswick, GA weather station. There is a 1-in-10 chance of a frost after March 10.

When is the first frost in Brunswick, GA?

The average first fall frost (32°F) is December 25. There is a 1-in-10 chance of frost by November 26, so tender plants are at risk from that point on.

How long is the growing season in 31521?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 314 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 31521Brunswick, GA

The average last spring frost in Brunswick is February 8 and the average first fall frost is December 25, giving a typical growing season of about 314 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Feb 8
Average first fall frost: Dec 25
Growing season: 314 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 31 · Feb 27 · Mar 19	Nov 14 · Dec 4 · Jan 2	281 days	100%
Frost / freeze (32°F)	Jan 9 · Feb 8 · Mar 10	Nov 26 · Dec 25 · Jan 20	314 days	96%
Hard freeze (28°F)	Dec 28 · Jan 24 · Feb 26	Dec 9 · Jan 6 · Feb 4	343 days	73%

Where these dates come from

ZIP code 31521 is matched to the NOAA station Brunswick, GA, 2.3 km away, at 13 ft elevation (3 ft higher than the ZIP code's center). Nearby stations for comparison:

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

Frost dates near Brunswick

Brunswick, GA 31520 · last Feb 8, first Dec 25
Jekyll Island, GA 31527 · last Feb 9, first Dec 26
Waverly, GA 31565 · last Feb 8, first Dec 25
Sea Island, GA 31561 · last Feb 9, first Dec 26
Saint Simons Island, GA 31522 · last Feb 9, first Dec 26
Darien, GA 31305 · last Feb 20, first Dec 19
Woodbine, GA 31569 · last Mar 14, first Nov 25
Waynesville, GA 31566 · last Mar 25, first Nov 15

Frequently asked questions

When is the last frost in Brunswick, GA?: For ZIP code 31521, the average last spring frost (32°F) is February 8, based on NOAA 1991-2020 climate normals for the Brunswick, GA weather station. There is a 1-in-10 chance of a frost after March 10.
When is the first frost in Brunswick, GA?: The average first fall frost (32°F) is December 25. There is a 1-in-10 chance of frost by November 26, so tender plants are at risk from that point on.
How long is the growing season in 31521?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 314 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.