Thompson Stn, TN: frost dates by year

Last spring and first fall frost at NOAA station USC00408953, 2003 to 2020, measured from daily minimum temperatures.

Elevation 775 ft, 35.764, -86.932. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 15	Oct 28
Earliest	Mar 6 (2012)	Oct 3 (2003)
Latest	Apr 29 (2008)	Nov 11 (2016)
Trend	6.5 days earlier per decade	7.7 days later per decade
Years with data	17	17

At 28°F (hard freeze) the median last spring date is Mar 23 and the median first fall date is Nov 2.

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
2020	Apr 15	Nov 2	Apr 15	Dec 1
2019	Apr 1	Oct 31	Mar 7	Nov 1
2018	Apr 17	Oct 22	Apr 8	Nov 11
2017	Mar 19	Oct 29	Mar 16	Nov 19
2016	Mar 22	Nov 11	Feb 27	Nov 20
2014	Apr 16	Nov 2	Mar 27	Nov 2
2013	Apr 20	Oct 25	Mar 27	Oct 25
2012	Mar 6	Nov 1	Mar 4	Nov 1
2011	Apr 17	Oct 21	Feb 26	Oct 29
2010	Mar 27	Oct 6	Mar 7	Oct 30
2009	Apr 22	Oct 19	Mar 4	Nov 27
2008	Apr 29	Oct 26	Mar 25	Oct 29
2007	Apr 10	Nov 3	Apr 9	Nov 7
2006	Apr 10	Oct 13	Mar 27	Oct 13
2005	Apr 25	Oct 28	Mar 18	Oct 30
2004	Apr 15	Nov 6	Mar 23	Nov 26
2003	Mar 31	Oct 3	Mar 31	Nov 14

"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.