Frost history / Silver Lake, AK
Silver Lake, AK: frost dates by year
Last spring and first fall frost at NOAA station USC00508470, 1993 to 2006, measured from daily minimum temperatures.
Elevation 1,200 ft, 61.517, -144.191. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 5 | Aug 24 |
| Earliest | May 27 (2001) | Aug 9 (1998) |
| Latest | Jun 27 (1994) | Sep 3 (1996) |
| Trend | 10.7 days earlier per decade | 4.2 days earlier per decade |
| Years with data | 13 | 11 |
At 28°F (hard freeze) the median last spring date is May 21 and the median first fall date is Sep 18.
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 |
|---|---|---|---|---|
| 2006 | Jun 8 | no data | May 18 | no data |
| 2005 | Jun 2 | Aug 28 | May 10 | Sep 29 |
| 2004 | Jun 3 | no data | May 17 | no data |
| 2003 | Jun 8 | Aug 23 | May 22 | Sep 10 |
| 2002 | Jun 8 | Aug 15 | May 18 | Sep 21 |
| 2001 | May 27 | Aug 31 | May 26 | Sep 9 |
| 2000 | May 30 | Aug 17 | May 21 | Sep 19 |
| 1999 | Jun 4 | Aug 24 | May 19 | Sep 26 |
| 1998 | Jun 1 | Aug 9 | May 18 | Aug 19 |
| 1997 | Jun 16 | no data | May 27 | no data |
| 1996 | Jun 15 | Sep 3 | May 23 | Sep 5 |
| 1995 | Jun 5 | Aug 22 | Jun 2 | Oct 2 |
| 1994 | Jun 27 | Sep 3 | May 31 | Sep 5 |
| 1993 | no data | Aug 25 | no data | Sep 18 |
"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.