Frost history / Swannanoa 2 Sse, NC
Swannanoa 2 Sse, NC: frost dates by year
Last spring and first fall frost at NOAA station USC00318448, 1984 to 2007, measured from daily minimum temperatures.
Elevation 4,320 ft, 35.573, -82.385. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 26 | Oct 15 |
| Earliest | Apr 7 (1987) | Sep 24 (1990) |
| Latest | May 31 (1984) | Nov 13 (1986) |
| Trend | 3.2 days earlier per decade | 3.2 days later per decade |
| Years with data | 24 | 24 |
At 28°F (hard freeze) the median last spring date is Apr 12 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 |
|---|---|---|---|---|
| 2007 | Apr 16 | Oct 29 | Apr 16 | Nov 6 |
| 2006 | Apr 9 | Oct 13 | Apr 9 | Oct 23 |
| 2005 | May 3 | Oct 24 | Apr 25 | Oct 26 |
| 2004 | May 4 | Nov 5 | Apr 14 | Nov 25 |
| 2003 | Apr 23 | Oct 3 | Mar 31 | Nov 13 |
| 2002 | May 20 | Oct 31 | Apr 7 | Nov 2 |
| 2001 | Apr 19 | Oct 16 | Apr 19 | Oct 17 |
| 2000 | Apr 22 | Oct 7 | Apr 9 | Oct 8 |
| 1999 | Apr 30 | Oct 23 | Apr 18 | Oct 23 |
| 1998 | Apr 11 | Oct 22 | Apr 5 | Nov 5 |
| 1997 | May 16 | Oct 23 | Apr 18 | Oct 27 |
| 1996 | Apr 24 | Oct 5 | Apr 24 | Oct 19 |
| 1995 | Apr 25 | Oct 15 | Apr 2 | Nov 3 |
| 1994 | May 19 | Oct 26 | Apr 7 | Nov 23 |
| 1993 | Apr 27 | Sep 30 | Apr 22 | Oct 28 |
| 1992 | May 9 | Oct 18 | Apr 5 | Oct 19 |
| 1991 | Apr 22 | Oct 6 | Mar 31 | Oct 7 |
| 1990 | May 6 | Sep 24 | Apr 18 | Oct 19 |
| 1989 | May 8 | Oct 8 | May 7 | Oct 9 |
| 1988 | Apr 20 | Oct 8 | Apr 16 | Oct 12 |
| 1987 | Apr 7 | Oct 3 | Apr 6 | Oct 8 |
| 1986 | May 3 | Nov 13 | Apr 23 | Nov 13 |
| 1985 | Apr 10 | Oct 6 | Apr 10 | Nov 5 |
| 1984 | May 31 | Nov 6 | Apr 1 | Nov 6 |
"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.