Frost history / Connell 1 W, WA
Connell 1 W, WA: frost dates by year
Last spring and first fall frost at NOAA station USC00451690, 1961 to 2002, measured from daily minimum temperatures.
Elevation 1,020 ft, 46.664, -118.883. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 5 | Oct 3 |
| Earliest | Apr 3 (1989) | Sep 7 (1992) |
| Latest | May 25 (1967) | Oct 31 (1979) |
| Trend | 2.5 days earlier per decade | 1.8 days later per decade |
| Years with data | 33 | 32 |
At 28°F (hard freeze) the median last spring date is Apr 15 and the median first fall date is Oct 17.
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 |
|---|---|---|---|---|
| 2002 | May 8 | Oct 1 | May 8 | Oct 11 |
| 2001 | May 6 | Oct 7 | Apr 14 | Oct 28 |
| 2000 | May 7 | Sep 23 | Apr 7 | Oct 22 |
| 1999 | May 11 | Sep 27 | May 10 | Oct 15 |
| 1998 | Apr 26 | Oct 16 | Apr 8 | Oct 16 |
| 1997 | May 2 | Oct 6 | Apr 12 | Oct 12 |
| 1996 | May 10 | Sep 25 | Apr 28 | Oct 17 |
| 1995 | Apr 22 | Oct 22 | Apr 15 | Oct 22 |
| 1994 | May 1 | Oct 12 | Mar 27 | Nov 2 |
| 1993 | Apr 6 | Sep 21 | Mar 26 | Oct 25 |
| 1992 | May 12 | Sep 7 | Apr 8 | Oct 14 |
| 1991 | Apr 26 | no data | Apr 6 | no data |
| 1990 | no data | Oct 6 | no data | Oct 6 |
| 1989 | Apr 3 | no data | Mar 5 | no data |
| 1988 | May 1 | Oct 27 | Apr 8 | Oct 27 |
| 1987 | May 19 | Oct 11 | Apr 12 | Oct 13 |
| 1986 | no data | Oct 12 | no data | Nov 9 |
| 1984 | May 17 | no data | Mar 4 | no data |
| 1983 | no data | Sep 28 | no data | Sep 28 |
| 1980 | Apr 11 | no data | Apr 1 | no data |
| 1979 | Apr 20 | Oct 31 | Apr 20 | Nov 1 |
| 1977 | May 16 | no data | May 6 | no data |
| 1976 | May 18 | Oct 4 | Mar 29 | Oct 19 |
| 1975 | May 4 | Oct 22 | Apr 20 | Oct 24 |
| 1974 | May 15 | Sep 27 | Apr 13 | Oct 6 |
| 1973 | May 9 | no data | Apr 28 | no data |
| 1972 | May 1 | Sep 25 | Apr 30 | Oct 24 |
| 1971 | Apr 22 | Sep 30 | Apr 16 | Oct 17 |
| 1970 | Apr 28 | Sep 14 | Apr 27 | Oct 13 |
| 1969 | no data | Oct 4 | no data | Oct 14 |
| 1968 | May 5 | Sep 20 | Apr 27 | Oct 16 |
| 1967 | May 25 | Oct 19 | Apr 28 | Oct 26 |
| 1966 | May 22 | Oct 9 | Apr 19 | Oct 9 |
| 1965 | May 17 | Sep 17 | May 6 | Sep 17 |
| 1964 | no data | Sep 18 | no data | Oct 3 |
| 1963 | May 4 | Oct 19 | Apr 2 | Oct 19 |
| 1962 | May 14 | Sep 8 | May 5 | Nov 7 |
| 1961 | May 4 | Sep 22 | Apr 18 | Oct 8 |
"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.