Decatur 4SE, AL: frost dates by year

Last spring and first fall frost at NOAA station USC00012209, 2001 to 2025, measured from daily minimum temperatures.

Elevation 550 ft, 34.576, -86.934. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Mar 23	Nov 14
Earliest	Feb 25 (2012)	Oct 29 (2008)
Latest	Apr 10 (2018)	Nov 29 (2024)
Trend	1.7 days earlier per decade	2.4 days later per decade
Years with data	20	17

At 28°F (hard freeze) the median last spring date is Mar 3 and the median first fall date is Nov 22.

The trend is a straight-line fit through the years with a freeze. A positive spring trend means the last frost now comes later. Short or patchy records give noisy trends.

Chart

Last spring frost (32°F)

First fall frost (32°F)

Dots are single years. The gray line is the median, the green line the fitted trend.

Year by year

Year	Last spring 32°F	First fall 32°F	Last spring 28°F	First fall 28°F
2025	Mar 23	Nov 10	Feb 23	Nov 11
2024	Mar 20	Nov 29	Feb 19	Nov 30
2023	Mar 22	Nov 1	Mar 21	Nov 29
2022	Mar 14	Nov 13	Mar 13	Nov 14
2021	no data	Nov 14	no data	none
2020	Feb 27	Nov 18	Feb 25	Dec 1
2019	Mar 31	Nov 2	Mar 7	Nov 12
2018	Apr 10	no data	Feb 8	no data
2017	no data	Nov 20	no data	Dec 9
2016	Mar 5	Nov 21	Feb 14	Nov 21
2015	Mar 29	Nov 22	Mar 8	Nov 23
2014	Mar 27	Nov 2	Mar 5	Nov 14
2013	Mar 27	no data	Mar 27	no data
2012	Feb 25	Nov 15	Feb 14	Nov 25
2011	Mar 11	Nov 11	Feb 12	Nov 11
2009	Mar 4	no data	Mar 3	no data
2008	Mar 9	Oct 29	Mar 9	Nov 19
2007	Apr 8	Nov 16	Apr 8	Nov 24
2006	no data	Nov 2	no data	Dec 2
2005	Mar 19	Nov 19	Mar 2	Nov 19
2004	Mar 23	no data	Feb 8	no data
2003	Mar 31	no data	Mar 10	no data
2001	Mar 28	no data	Feb 22	no data

"none" means the station recorded no freeze at that threshold in that half of the year. "no data" means more than 10% of the season's daily readings were missing. Years with no usable data are left out. See the methodology for the rules, and the ZIP lookup for 1991 to 2020 frost probabilities.