Frost history / Rockwood 2, TN
Rockwood 2, TN: frost dates by year
Last spring and first fall frost at NOAA station USC00407834, 1962 to 2011, measured from daily minimum temperatures.
Elevation 767 ft, 35.836, -84.692. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 18 | Oct 20 |
| Earliest | Mar 1 (2003) | Sep 30 (1967) |
| Latest | May 19 (1976) | Nov 14 (1986) |
| Trend | 6.7 days earlier per decade | 3.6 days later per decade |
| Years with data | 42 | 40 |
At 28°F (hard freeze) the median last spring date is Apr 3 and the median first fall date is Nov 4.
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 |
|---|---|---|---|---|
| 2011 | Apr 7 | Oct 30 | Feb 15 | Nov 11 |
| 2010 | Mar 27 | Oct 30 | Mar 8 | Nov 7 |
| 2009 | Apr 9 | Oct 19 | Apr 9 | Nov 28 |
| 2008 | Apr 17 | Oct 29 | Mar 26 | Oct 30 |
| 2007 | Apr 11 | Nov 7 | Apr 9 | Nov 8 |
| 2006 | Mar 28 | Oct 12 | Mar 28 | Nov 3 |
| 2005 | Apr 25 | Oct 29 | Mar 18 | Nov 17 |
| 2003 | Mar 1 | Nov 13 | Feb 24 | Nov 24 |
| 2000 | Apr 11 | Oct 9 | Apr 6 | Nov 15 |
| 1999 | Mar 29 | Oct 24 | Mar 17 | Nov 3 |
| 1998 | Apr 7 | Nov 6 | Mar 14 | Nov 7 |
| 1997 | Apr 16 | Oct 23 | Apr 11 | Oct 24 |
| 1996 | Apr 12 | Oct 20 | Apr 12 | Nov 3 |
| 1995 | Apr 6 | Oct 21 | Apr 2 | Nov 5 |
| 1994 | Apr 10 | Oct 28 | Apr 1 | Nov 23 |
| 1993 | Apr 18 | Oct 28 | Mar 19 | Oct 29 |
| 1992 | Apr 30 | Oct 20 | Apr 4 | Nov 8 |
| 1991 | Apr 1 | Oct 7 | Mar 12 | Nov 4 |
| 1990 | Apr 18 | Oct 27 | Apr 9 | Nov 19 |
| 1989 | May 8 | Oct 21 | Apr 13 | Oct 21 |
| 1988 | Apr 28 | Oct 13 | Mar 17 | Oct 14 |
| 1987 | Apr 5 | Oct 4 | Apr 4 | Oct 22 |
| 1986 | Apr 24 | Nov 14 | Mar 23 | Nov 14 |
| 1981 | Apr 7 | Oct 20 | Mar 26 | Oct 20 |
| 1980 | Mar 27 | Oct 6 | Mar 23 | Nov 6 |
| 1979 | Mar 26 | Oct 14 | Mar 17 | Nov 4 |
| 1978 | Apr 22 | Oct 9 | Mar 7 | Oct 15 |
| 1977 | May 11 | no data | Apr 6 | no data |
| 1976 | May 19 | Oct 18 | Apr 13 | Oct 22 |
| 1975 | Apr 17 | Nov 1 | Apr 13 | Nov 15 |
| 1974 | May 7 | Oct 3 | Apr 10 | Oct 21 |
| 1973 | May 18 | Oct 18 | Apr 14 | Nov 6 |
| 1972 | Apr 27 | no data | Apr 9 | no data |
| 1971 | May 4 | Oct 12 | Apr 9 | Nov 4 |
| 1970 | Apr 11 | Oct 17 | Apr 8 | Nov 17 |
| 1969 | May 13 | no data | Mar 31 | no data |
| 1968 | May 6 | Oct 5 | May 6 | Oct 5 |
| 1967 | Apr 29 | Sep 30 | Mar 23 | Sep 30 |
| 1966 | May 11 | Oct 2 | Apr 11 | Oct 28 |
| 1965 | Apr 18 | Oct 13 | Mar 23 | Oct 25 |
| 1964 | Apr 30 | Oct 7 | Apr 10 | Oct 20 |
| 1963 | May 2 | Oct 30 | May 2 | Nov 2 |
| 1962 | no data | Oct 24 | no data | Oct 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.