Frost history / Central #2, AK
Central #2, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00501466, 1963 to 2010, measured from daily minimum temperatures.
Elevation 920 ft, 65.567, -144.765. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 5 | Aug 18 |
| Earliest | May 17 (2010) | Aug 3 (1964) |
| Latest | Jul 31 (1969) | Sep 7 (1979) |
| Trend | 5.7 days earlier per decade | little change (less than half a day per decade) |
| Years with data | 29 | 29 |
At 28°F (hard freeze) the median last spring date is May 24 and the median first fall date is Aug 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 |
|---|---|---|---|---|
| 2010 | May 17 | Aug 26 | May 14 | Sep 4 |
| 2009 | May 31 | Aug 20 | May 18 | Sep 15 |
| 2008 | May 31 | Aug 12 | May 7 | Aug 30 |
| 2007 | May 20 | no data | May 18 | no data |
| 2006 | Jun 6 | no data | Jun 6 | no data |
| 2005 | Jul 21 | Aug 18 | May 5 | Aug 19 |
| 2004 | May 27 | Aug 25 | May 27 | Aug 25 |
| 2003 | no data | Aug 9 | no data | Sep 13 |
| 2002 | Jun 22 | Aug 15 | May 29 | Aug 16 |
| 2001 | May 26 | Aug 6 | May 19 | Sep 7 |
| 2000 | May 30 | Aug 7 | May 28 | Aug 16 |
| 1999 | Jul 24 | Aug 27 | May 23 | Sep 1 |
| 1998 | May 24 | Aug 19 | May 15 | Aug 19 |
| 1997 | Jun 2 | Aug 20 | Jun 1 | Sep 15 |
| 1996 | no data | Aug 20 | no data | Aug 20 |
| 1979 | Jun 15 | Sep 7 | May 20 | Sep 14 |
| 1978 | May 29 | Aug 18 | May 28 | Aug 25 |
| 1977 | Jun 29 | no data | May 23 | no data |
| 1976 | May 26 | Aug 21 | May 18 | Sep 3 |
| 1975 | Jun 5 | Aug 11 | May 20 | Aug 11 |
| 1974 | Jul 1 | Aug 20 | Jun 6 | Aug 20 |
| 1973 | Jun 4 | Aug 13 | May 22 | Aug 16 |
| 1972 | Jun 5 | Aug 25 | Jun 3 | Sep 9 |
| 1971 | Jun 14 | Aug 6 | Jun 14 | Aug 16 |
| 1970 | Jul 21 | Aug 23 | Jul 21 | Sep 4 |
| 1969 | Jul 31 | Aug 6 | Jun 2 | Aug 11 |
| 1968 | May 26 | Aug 30 | May 25 | Aug 31 |
| 1967 | Jul 10 | Aug 31 | Jul 10 | Sep 5 |
| 1966 | Jul 26 | Aug 11 | May 25 | Aug 11 |
| 1965 | Jun 6 | Aug 13 | May 18 | Aug 25 |
| 1964 | Jul 21 | Aug 3 | May 24 | Sep 4 |
| 1963 | no data | Aug 8 | no data | Aug 27 |
"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.