Frost history / Port Alexander, AK
Port Alexander, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00507557, 1951 to 2014, measured from daily minimum temperatures.
Elevation 12 ft, 56.247, -134.645. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 18 | Oct 28 |
| Earliest | Mar 21 (1984) | Sep 13 (1992) |
| Latest | May 21 (1955) | Dec 18 (2002) |
| Trend | 1.1 days earlier per decade | 2.4 days later per decade |
| Years with data | 41 | 36 |
At 28°F (hard freeze) the median last spring date is Mar 21 and the median first fall date is Nov 19.
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 |
|---|---|---|---|---|
| 2014 | no data | Nov 28 | no data | Nov 28 |
| 2013 | Apr 30 | no data | Mar 28 | no data |
| 2012 | Apr 9 | Oct 28 | Mar 21 | Oct 30 |
| 2011 | Apr 20 | Nov 4 | Mar 13 | Nov 19 |
| 2010 | Apr 12 | Nov 17 | Mar 8 | Nov 23 |
| 2009 | Apr 23 | Nov 16 | Mar 25 | Dec 14 |
| 2008 | Apr 30 | Oct 27 | Mar 29 | Oct 27 |
| 2007 | Apr 5 | Oct 27 | Mar 31 | Oct 27 |
| 2006 | Apr 30 | Nov 4 | Mar 19 | Nov 5 |
| 2005 | Apr 22 | no data | Apr 5 | no data |
| 2004 | no data | Oct 23 | no data | Dec 7 |
| 2003 | Apr 15 | no data | Mar 14 | no data |
| 2002 | no data | Dec 18 | no data | none |
| 1999 | May 3 | no data | Mar 18 | no data |
| 1998 | Apr 12 | no data | Jan 14 | no data |
| 1997 | Apr 18 | Nov 24 | Mar 31 | none |
| 1996 | May 8 | Oct 1 | May 1 | Nov 18 |
| 1995 | Apr 18 | no data | Mar 25 | no data |
| 1994 | Apr 17 | Nov 1 | Mar 4 | Nov 15 |
| 1993 | Apr 2 | Nov 16 | Mar 26 | Nov 21 |
| 1992 | Apr 10 | Sep 13 | Mar 25 | Oct 15 |
| 1991 | no data | Oct 22 | no data | Oct 28 |
| 1990 | Apr 7 | Oct 4 | Mar 21 | Nov 8 |
| 1989 | Apr 17 | Oct 26 | Mar 18 | Nov 11 |
| 1988 | no data | Oct 21 | no data | Dec 6 |
| 1987 | Apr 18 | Oct 5 | Mar 6 | Nov 16 |
| 1986 | May 12 | Nov 7 | Apr 10 | Nov 8 |
| 1985 | Apr 30 | Oct 21 | Apr 10 | Nov 8 |
| 1984 | Mar 21 | no data | Feb 8 | no data |
| 1983 | Apr 10 | Nov 7 | Feb 14 | Dec 8 |
| 1982 | May 14 | Oct 28 | Mar 18 | Nov 19 |
| 1981 | Apr 9 | no data | Feb 10 | no data |
| 1980 | Apr 17 | Dec 1 | Jan 28 | Dec 1 |
| 1979 | Apr 17 | no data | Mar 31 | no data |
| 1962 | May 7 | Nov 22 | Mar 26 | Dec 7 |
| 1961 | Apr 21 | Sep 28 | Apr 13 | Nov 19 |
| 1960 | Mar 30 | Nov 7 | Mar 10 | Dec 19 |
| 1959 | May 3 | Oct 8 | Mar 13 | Nov 14 |
| 1958 | Mar 30 | no data | Mar 20 | no data |
| 1957 | Apr 19 | Nov 19 | Mar 26 | Dec 19 |
| 1956 | May 10 | Sep 26 | Mar 20 | Oct 27 |
| 1955 | May 21 | Oct 22 | Mar 28 | Nov 4 |
| 1954 | May 1 | Oct 6 | Apr 27 | Dec 1 |
| 1953 | Apr 24 | Nov 1 | Mar 13 | Nov 30 |
| 1952 | Apr 7 | Nov 13 | Apr 1 | none |
| 1951 | May 4 | Oct 20 | Mar 16 | Nov 21 |
"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.