Spring City, TN: frost dates by year

Last spring and first fall frost at NOAA station USC00408540, 2004 to 2025, measured from daily minimum temperatures.

Elevation 755 ft, 35.676, -84.855. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 11	Oct 31
Earliest	Mar 20 (2017)	Oct 5 (2014)
Latest	May 10 (2020)	Nov 15 (2004)
Trend	little change (less than half a day per decade)	2.2 days earlier per decade
Years with data	19	20

At 28°F (hard freeze) the median last spring date is Mar 23 and the median first fall date is Nov 8.

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	Apr 14	Oct 31	Mar 22	Nov 10
2024	Mar 30	Oct 17	Mar 20	Nov 30
2023	Mar 31	Nov 1	Mar 22	Nov 2
2022	Apr 20	Oct 18	Apr 11	Oct 20
2021	Apr 22	Nov 5	Apr 22	Nov 14
2020	May 10	Nov 2	Mar 9	Nov 18
2019	Apr 4	Nov 2	Mar 21	Nov 2
2018	Apr 18	Oct 22	Apr 17	Nov 11
2017	Mar 20	Oct 30	Mar 17	Oct 30
2016	Apr 10	Nov 11	Mar 23	Nov 20
2015	Apr 6	Nov 14	Apr 6	Nov 14
2014	Apr 17	Oct 5	Apr 1	Nov 2
2013	Apr 20	Oct 25	Mar 29	Oct 26
2012	Apr 13	Nov 1	Mar 11	Nov 1
2011	no data	Oct 22	no data	Nov 2
2010	Mar 29	Oct 30	Mar 7	Nov 6
2009	no data	Oct 19	no data	Nov 28
2007	Apr 11	Nov 3	Apr 11	Nov 7
2006	Apr 11	no data	Mar 28	no data
2005	Apr 26	Oct 27	Mar 19	Nov 11
2004	Apr 7	Nov 15	Mar 24	Nov 26

"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.