Frost history / Cooper Landing 5 W, AK
Cooper Landing 5 W, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00502149, 1975 to 2013, measured from daily minimum temperatures.
Elevation 375 ft, 60.487, -149.968. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 17 | Aug 24 |
| Earliest | May 28 (1978) | Aug 1 (2009) |
| Latest | Jul 17 (1982) | Sep 15 (1989) |
| Trend | little change (less than half a day per decade) | 2.7 days earlier per decade |
| Years with data | 27 | 28 |
At 28°F (hard freeze) the median last spring date is May 29 and the median first fall date is Sep 13.
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 |
|---|---|---|---|---|
| 2013 | no data | Aug 25 | no data | Sep 20 |
| 2009 | no data | Aug 1 | no data | Sep 23 |
| 2008 | Jul 1 | Aug 8 | May 28 | Sep 23 |
| 2007 | Jun 27 | Aug 25 | May 20 | Sep 16 |
| 2006 | Jun 24 | Aug 29 | Jun 5 | Sep 30 |
| 2005 | Jun 4 | Sep 2 | May 19 | Oct 3 |
| 2004 | Jun 1 | no data | May 4 | no data |
| 2003 | Jun 8 | Aug 2 | Jun 3 | Sep 11 |
| 2002 | Jun 2 | Aug 14 | May 18 | Sep 20 |
| 2001 | Jun 10 | Sep 6 | May 31 | Sep 6 |
| 2000 | Jun 18 | Aug 7 | Jun 4 | Aug 23 |
| 1999 | Jun 6 | Aug 24 | Jun 3 | Sep 26 |
| 1998 | no data | Aug 12 | no data | Aug 19 |
| 1997 | Jun 18 | Sep 2 | Jun 17 | Sep 26 |
| 1996 | Jun 17 | Aug 3 | Jun 6 | Aug 28 |
| 1995 | Jun 27 | Sep 4 | Jun 6 | Oct 6 |
| 1994 | Jun 26 | no data | Jun 1 | no data |
| 1993 | Jun 16 | Aug 23 | May 28 | Aug 24 |
| 1992 | Jun 20 | Sep 1 | Jun 6 | Sep 9 |
| 1991 | Jun 10 | Aug 28 | May 23 | Aug 29 |
| 1990 | Jun 22 | Aug 29 | May 25 | Sep 7 |
| 1989 | Jun 17 | Sep 15 | May 25 | Sep 16 |
| 1988 | Jun 20 | Sep 3 | May 22 | Sep 8 |
| 1987 | Jul 1 | no data | May 30 | no data |
| 1986 | Jun 13 | Aug 17 | Jun 13 | Sep 10 |
| 1985 | no data | Aug 16 | no data | Sep 5 |
| 1982 | Jul 17 | no data | May 29 | no data |
| 1981 | no data | Aug 16 | no data | Sep 22 |
| 1980 | Jun 9 | Aug 20 | Jun 1 | Sep 2 |
| 1979 | Jun 9 | no data | May 23 | no data |
| 1978 | May 28 | Aug 24 | May 27 | Sep 23 |
| 1977 | Jun 8 | Aug 29 | May 27 | Sep 19 |
| 1975 | no data | Aug 29 | no data | Aug 29 |
"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.