Frost history / Mt Adams Rs, WA
Mt Adams Rs, WA: frost dates by year
Last spring and first fall frost at NOAA station USC00455659, 1951 to 2024, measured from daily minimum temperatures.
Elevation 1,950 ft, 46.000, -121.540. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 1 | Sep 14 |
| Earliest | Apr 19 (1993) | Aug 25 (1992) |
| Latest | Jul 7 (1971) | Nov 1 (2014) |
| Trend | 2.9 days earlier per decade | 2.5 days later per decade |
| Years with data | 40 | 42 |
At 28°F (hard freeze) the median last spring date is May 7 and the median first fall date is Oct 3.
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 |
|---|---|---|---|---|
| 2024 | no data | Sep 30 | no data | Sep 30 |
| 2023 | May 8 | Sep 30 | Apr 16 | Oct 27 |
| 2022 | no data | Oct 22 | no data | Nov 3 |
| 2020 | May 8 | Sep 10 | May 8 | Oct 22 |
| 2019 | Jun 10 | Sep 28 | May 1 | Oct 1 |
| 2018 | Jun 13 | Sep 18 | Apr 23 | Oct 3 |
| 2017 | May 18 | no data | Apr 29 | no data |
| 2016 | Jun 20 | Sep 21 | Apr 18 | Oct 12 |
| 2014 | May 12 | Nov 1 | Apr 21 | Nov 8 |
| 2013 | May 2 | no data | May 2 | no data |
| 2012 | no data | Sep 11 | no data | Oct 4 |
| 2010 | no data | Oct 5 | no data | Oct 13 |
| 1995 | May 22 | no data | Apr 24 | no data |
| 1994 | Jun 2 | no data | May 3 | no data |
| 1993 | Apr 19 | Sep 13 | Apr 19 | Sep 21 |
| 1992 | no data | Aug 25 | no data | Sep 7 |
| 1991 | Jun 4 | Sep 14 | Apr 30 | Sep 21 |
| 1990 | no data | Oct 6 | no data | Oct 6 |
| 1989 | May 29 | Sep 3 | Apr 23 | Oct 3 |
| 1988 | Jun 11 | Sep 11 | May 7 | Sep 18 |
| 1987 | Jun 2 | Sep 17 | May 20 | Oct 10 |
| 1986 | May 22 | Sep 11 | May 16 | Oct 12 |
| 1985 | May 15 | Sep 7 | May 13 | Sep 23 |
| 1984 | Jun 1 | Sep 2 | May 5 | Sep 24 |
| 1983 | no data | Sep 14 | no data | Sep 29 |
| 1982 | no data | Sep 14 | no data | Sep 16 |
| 1981 | no data | Sep 24 | no data | Oct 21 |
| 1979 | Jun 7 | no data | Apr 25 | no data |
| 1978 | May 30 | Sep 19 | May 23 | Oct 13 |
| 1977 | May 25 | Sep 22 | May 12 | Oct 4 |
| 1976 | Jun 26 | Sep 8 | Jun 3 | Oct 18 |
| 1974 | May 31 | Sep 13 | Apr 17 | Oct 6 |
| 1973 | Jun 18 | Sep 1 | May 26 | Oct 3 |
| 1972 | Jul 3 | Sep 10 | May 25 | Sep 25 |
| 1971 | Jul 7 | Sep 12 | Apr 23 | Sep 12 |
| 1970 | May 21 | Sep 9 | May 11 | Sep 13 |
| 1969 | May 8 | Aug 29 | Apr 30 | Sep 15 |
| 1968 | no data | Sep 20 | no data | Oct 2 |
| 1965 | May 21 | no data | May 7 | no data |
| 1964 | no data | Sep 9 | no data | Oct 5 |
| 1963 | May 16 | no data | May 13 | no data |
| 1962 | Jul 2 | Sep 9 | May 14 | Oct 5 |
| 1961 | May 11 | no data | Apr 19 | no data |
| 1960 | May 22 | Sep 6 | May 22 | Oct 10 |
| 1959 | Jun 15 | Sep 16 | May 11 | Oct 19 |
| 1958 | no data | Sep 3 | no data | Oct 21 |
| 1956 | May 12 | no data | Apr 30 | no data |
| 1955 | Jul 2 | Sep 21 | May 9 | Sep 22 |
| 1954 | Jul 3 | Sep 29 | May 28 | Sep 30 |
| 1953 | Jun 5 | Sep 17 | May 31 | Sep 24 |
| 1952 | Jun 23 | no data | May 9 | no data |
| 1951 | Jun 1 | Sep 26 | May 29 | Sep 26 |
"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.