Frost history / Wrangell Ap, AK
Wrangell Ap, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00509919, 1951 to 2025, measured from daily minimum temperatures.
Elevation 56 ft, 56.473, -132.387. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 22 | Oct 22 |
| Earliest | Mar 15 (1980) | Sep 14 (1992) |
| Latest | Jul 5 (1973) | Dec 8 (1981) |
| Trend | 4.4 days earlier per decade | 2.3 days later per decade |
| Years with data | 50 | 53 |
At 28°F (hard freeze) the median last spring date is Mar 31 and the median first fall date is Nov 7.
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 |
|---|---|---|---|---|
| 2025 | Mar 17 | Oct 12 | Mar 17 | Nov 16 |
| 2011 | Apr 22 | Nov 3 | Apr 22 | Nov 18 |
| 2010 | Apr 13 | Nov 10 | Apr 1 | Nov 17 |
| 2009 | no data | Nov 15 | no data | Nov 20 |
| 2008 | Apr 21 | Nov 9 | Apr 21 | Dec 2 |
| 2007 | Apr 4 | Oct 20 | Apr 4 | Nov 29 |
| 2006 | Apr 16 | Oct 28 | Mar 19 | Oct 29 |
| 2005 | Apr 13 | Nov 13 | Mar 20 | Nov 29 |
| 2004 | Mar 19 | Oct 22 | Mar 1 | Nov 5 |
| 2003 | May 5 | Oct 29 | Apr 4 | Oct 29 |
| 2002 | no data | Oct 31 | no data | Oct 31 |
| 2000 | Apr 16 | Oct 2 | Apr 10 | Nov 10 |
| 1999 | Apr 12 | no data | Mar 10 | no data |
| 1998 | no data | Oct 29 | no data | Nov 10 |
| 1997 | no data | Oct 11 | no data | none |
| 1995 | Apr 20 | Oct 30 | Mar 25 | Oct 31 |
| 1994 | Apr 18 | Oct 31 | Mar 5 | Nov 1 |
| 1993 | Apr 18 | Nov 21 | Mar 28 | Nov 21 |
| 1992 | May 20 | Sep 14 | Apr 10 | Oct 14 |
| 1991 | Apr 20 | Oct 17 | Mar 25 | Oct 22 |
| 1990 | Apr 28 | Oct 5 | Mar 21 | Nov 5 |
| 1989 | no data | Oct 16 | no data | Nov 11 |
| 1988 | Apr 22 | Oct 28 | Mar 16 | Nov 26 |
| 1987 | Apr 23 | Oct 8 | Mar 20 | Nov 16 |
| 1986 | Apr 23 | no data | Apr 12 | no data |
| 1985 | Apr 28 | Oct 6 | Mar 27 | Nov 9 |
| 1982 | no data | Oct 17 | no data | Nov 8 |
| 1981 | Apr 12 | Dec 8 | Feb 25 | Dec 9 |
| 1980 | Mar 15 | Nov 29 | Mar 6 | Nov 30 |
| 1979 | Apr 20 | Nov 3 | Apr 2 | Nov 7 |
| 1978 | Apr 16 | Oct 26 | Mar 6 | Nov 9 |
| 1977 | Apr 19 | Oct 26 | Apr 14 | Oct 27 |
| 1976 | May 11 | Oct 15 | Apr 15 | Oct 31 |
| 1975 | no data | Oct 27 | no data | Nov 16 |
| 1974 | Apr 23 | Oct 4 | Apr 15 | Nov 12 |
| 1973 | Jul 5 | Oct 17 | Apr 13 | Nov 1 |
| 1972 | Jun 24 | Sep 24 | May 22 | Sep 25 |
| 1971 | May 9 | Oct 19 | May 9 | Oct 26 |
| 1970 | May 18 | Oct 6 | Mar 11 | Nov 5 |
| 1969 | May 6 | Oct 25 | Mar 22 | Oct 25 |
| 1968 | May 5 | Oct 9 | May 5 | Oct 9 |
| 1967 | Apr 21 | no data | Apr 21 | no data |
| 1966 | Apr 27 | Oct 12 | Apr 27 | Oct 12 |
| 1965 | May 13 | Oct 19 | May 11 | Nov 6 |
| 1964 | May 19 | Oct 29 | May 13 | Nov 7 |
| 1963 | Apr 25 | Nov 6 | Apr 18 | Nov 14 |
| 1962 | May 8 | Oct 23 | Apr 20 | Dec 7 |
| 1961 | Apr 18 | Sep 28 | Mar 13 | Oct 20 |
| 1960 | Apr 21 | Nov 7 | Mar 31 | Nov 7 |
| 1959 | Apr 15 | Oct 5 | Mar 14 | Nov 2 |
| 1957 | Apr 22 | no data | Mar 2 | no data |
| 1956 | Jun 23 | Sep 15 | Mar 21 | Sep 16 |
| 1955 | Apr 28 | Oct 22 | Mar 28 | Nov 2 |
| 1954 | May 8 | Oct 4 | Apr 29 | Dec 1 |
| 1953 | Apr 19 | Nov 2 | Apr 12 | Nov 30 |
| 1952 | Apr 7 | Nov 14 | Apr 6 | Nov 15 |
| 1951 | May 2 | Sep 25 | Mar 22 | Oct 24 |
"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.