Smyrna 6S, TN: frost dates by year

Last spring and first fall frost at NOAA station USC00408414, 1998 to 2010, measured from daily minimum temperatures.

Elevation 550 ft, 35.911, -86.558. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 11	Oct 15
Earliest	Mar 31 (2003)	Sep 22 (2004)
Latest	May 22 (2002)	Nov 2 (2002)
Trend	8.6 days earlier per decade	2.2 days earlier per decade
Years with data	11	12

At 28°F (hard freeze) the median last spring date is Mar 30 and the median first fall date is Oct 27.

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
2010	Apr 10	Oct 4	Mar 27	Oct 30
2009	Apr 10	Oct 18	Mar 30	Oct 19
2008	Apr 29	Oct 19	Mar 26	Oct 29
2007	Apr 11	Oct 30	Apr 11	Nov 7
2006	Apr 10	Oct 13	Mar 28	Oct 13
2005	May 3	no data	Mar 19	no data
2004	no data	Sep 22	no data	Nov 15
2003	Mar 31	Oct 2	Mar 31	Nov 14
2002	May 22	Nov 2	Apr 7	Nov 2
2001	Apr 27	Oct 7	Apr 19	Oct 7
2000	Apr 11	Oct 8	Apr 9	Oct 9
1999	Apr 18	Oct 20	Mar 28	Oct 24
1998	no data	Oct 23	no data	Oct 23

"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.