Frost history / Echeta 2 Nw, WY
Echeta 2 Nw, WY: frost dates by year
Last spring and first fall frost at NOAA station USC00482881, 1965 to 2005, measured from daily minimum temperatures.
Elevation 4,000 ft, 44.483, -105.899. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 22 | Sep 18 |
| Earliest | May 2 (1972) | Aug 22 (1966) |
| Latest | Jun 20 (1986) | Oct 10 (1986) |
| Trend | 0.9 days earlier per decade | 4.5 days later per decade |
| Years with data | 28 | 29 |
At 28°F (hard freeze) the median last spring date is May 11 and the median first fall date is Sep 22.
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 |
|---|---|---|---|---|
| 2005 | May 28 | Sep 26 | May 12 | Oct 5 |
| 2003 | no data | Sep 18 | no data | Sep 27 |
| 2002 | no data | Sep 22 | no data | Oct 12 |
| 2001 | no data | Oct 5 | no data | Oct 5 |
| 2000 | May 18 | Sep 22 | May 13 | Sep 22 |
| 1999 | May 17 | no data | May 7 | no data |
| 1997 | May 28 | Oct 6 | May 3 | Oct 9 |
| 1996 | May 21 | Sep 24 | May 11 | Sep 26 |
| 1995 | May 25 | Sep 21 | Apr 27 | Sep 21 |
| 1993 | May 24 | Sep 13 | May 1 | Sep 14 |
| 1992 | May 16 | Aug 30 | May 2 | Sep 14 |
| 1991 | May 5 | Sep 18 | May 5 | Sep 18 |
| 1990 | Jun 2 | Sep 22 | May 14 | Oct 3 |
| 1989 | May 26 | Sep 11 | May 26 | Sep 11 |
| 1988 | May 21 | Sep 21 | May 21 | Oct 6 |
| 1987 | May 21 | Sep 18 | May 4 | Sep 18 |
| 1986 | Jun 20 | Oct 10 | May 10 | Oct 12 |
| 1983 | May 16 | Sep 18 | May 15 | Sep 19 |
| 1981 | no data | Sep 27 | no data | Oct 9 |
| 1980 | May 13 | Sep 16 | May 7 | Sep 22 |
| 1979 | no data | Oct 3 | no data | Oct 8 |
| 1978 | Jun 2 | no data | May 7 | no data |
| 1977 | May 5 | no data | May 5 | no data |
| 1976 | May 17 | Sep 20 | Apr 24 | Sep 28 |
| 1975 | May 25 | Sep 12 | May 21 | Sep 12 |
| 1974 | Jun 1 | Sep 1 | May 23 | Sep 13 |
| 1973 | May 22 | Sep 15 | May 12 | Sep 17 |
| 1972 | May 2 | no data | May 1 | no data |
| 1971 | no data | Sep 15 | no data | Sep 17 |
| 1970 | no data | Sep 14 | no data | Sep 14 |
| 1969 | Jun 14 | Sep 15 | Jun 14 | Oct 4 |
| 1968 | May 20 | no data | May 20 | no data |
| 1967 | May 11 | no data | May 11 | no data |
| 1966 | Jun 16 | Aug 22 | May 19 | Aug 22 |
| 1965 | May 27 | Sep 5 | May 27 | Sep 16 |
"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.