Frost history / Glenoma, WA
Glenoma, WA: frost dates by year
Last spring and first fall frost at NOAA station USC00453177, 1966 to 2000, measured from daily minimum temperatures.
Elevation 840 ft, 46.519, -122.138. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 6 | Oct 8 |
| Earliest | Mar 24 (1979) | Sep 1 (1966) |
| Latest | Jun 3 (1976) | Oct 31 (1979) |
| Trend | 3.2 days earlier per decade | 1.8 days later per decade |
| Years with data | 28 | 31 |
At 28°F (hard freeze) the median last spring date is Apr 12 and the median first fall date is Oct 30.
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 |
|---|---|---|---|---|
| 2000 | no data | Sep 22 | no data | Sep 22 |
| 1999 | May 10 | Sep 30 | Apr 13 | Oct 16 |
| 1998 | Apr 18 | Oct 18 | Mar 27 | Oct 29 |
| 1997 | May 1 | Oct 18 | Apr 11 | Oct 18 |
| 1996 | May 9 | Oct 15 | Mar 28 | Oct 19 |
| 1994 | no data | Oct 3 | no data | Oct 11 |
| 1993 | Apr 19 | no data | Mar 28 | no data |
| 1992 | May 21 | Sep 7 | May 12 | Oct 15 |
| 1991 | May 1 | Oct 8 | Apr 12 | Oct 30 |
| 1990 | Apr 30 | no data | Mar 31 | no data |
| 1989 | no data | Sep 17 | no data | Oct 15 |
| 1988 | May 25 | Sep 19 | Apr 12 | Nov 14 |
| 1987 | Apr 26 | Oct 13 | Mar 28 | Nov 28 |
| 1986 | May 16 | Oct 13 | Apr 24 | Nov 10 |
| 1985 | no data | Oct 8 | no data | Oct 9 |
| 1984 | Apr 27 | Oct 15 | Apr 26 | Oct 17 |
| 1983 | Apr 25 | Sep 28 | Apr 13 | Nov 29 |
| 1982 | May 5 | Oct 18 | Apr 25 | Nov 9 |
| 1981 | May 12 | Oct 12 | Apr 13 | Nov 4 |
| 1980 | Apr 11 | Oct 16 | Mar 25 | Nov 12 |
| 1979 | Mar 24 | Oct 31 | Mar 22 | Nov 9 |
| 1978 | May 6 | Oct 26 | Apr 12 | Nov 5 |
| 1977 | May 12 | Oct 2 | Apr 2 | Nov 8 |
| 1976 | Jun 3 | Oct 17 | Apr 2 | Nov 19 |
| 1975 | May 25 | Oct 23 | Apr 29 | Nov 18 |
| 1974 | May 17 | Oct 7 | Mar 21 | Nov 28 |
| 1973 | Apr 30 | Oct 3 | Apr 29 | Nov 2 |
| 1972 | May 25 | Sep 26 | Apr 30 | Oct 30 |
| 1971 | May 17 | Oct 15 | Apr 3 | Oct 16 |
| 1970 | Apr 28 | Sep 13 | Apr 14 | Sep 13 |
| 1969 | May 15 | Sep 15 | Apr 26 | Oct 14 |
| 1968 | May 2 | Oct 2 | Apr 17 | Nov 4 |
| 1966 | no data | Sep 1 | no data | Oct 14 |
"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.