Frost history / Centennial 1NE, WY
Centennial 1NE, WY: frost dates by year
Last spring and first fall frost at NOAA station USC00481610, 1951 to 2007, measured from daily minimum temperatures.
Elevation 8,170 ft, 41.314, -106.129. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 15 | Sep 9 |
| Earliest | May 15 (1956) | Aug 4 (1980) |
| Latest | Jul 30 (1967) | Oct 16 (1963) |
| Trend | 1.6 days earlier per decade | little change (less than half a day per decade) |
| Years with data | 38 | 37 |
At 28°F (hard freeze) the median last spring date is Jun 2 and the median first fall date is Sep 16.
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 |
|---|---|---|---|---|
| 2007 | Jun 8 | no data | Jun 8 | no data |
| 2006 | no data | Sep 2 | no data | Sep 17 |
| 2004 | Jun 13 | no data | Jun 1 | no data |
| 2003 | Jun 27 | no data | Jun 13 | no data |
| 2002 | Jun 12 | Sep 19 | May 27 | Sep 22 |
| 2001 | Jun 14 | Sep 7 | Jun 13 | Sep 8 |
| 2000 | no data | Sep 7 | no data | Sep 20 |
| 1999 | Jun 11 | Sep 5 | May 19 | Sep 13 |
| 1994 | Jun 9 | Sep 21 | Jun 9 | Sep 22 |
| 1993 | no data | Aug 31 | no data | Sep 13 |
| 1991 | Jun 15 | Sep 15 | May 13 | Sep 15 |
| 1990 | Jun 17 | Sep 20 | May 26 | Oct 7 |
| 1989 | Jun 22 | Sep 9 | Jun 22 | Sep 12 |
| 1988 | Jun 1 | Sep 4 | May 11 | Sep 13 |
| 1987 | Jun 3 | Aug 17 | Jun 3 | Sep 18 |
| 1986 | Jun 11 | Sep 19 | Jun 11 | Sep 26 |
| 1985 | Jun 27 | Aug 13 | Jun 27 | Sep 20 |
| 1984 | Jun 10 | Sep 15 | Jun 10 | Sep 22 |
| 1983 | Jun 14 | Sep 16 | Jun 14 | Sep 20 |
| 1982 | Jun 19 | Sep 12 | Jun 9 | Sep 14 |
| 1981 | Jun 16 | Sep 27 | Jun 16 | Oct 1 |
| 1980 | Jun 28 | Aug 4 | Jun 2 | Sep 1 |
| 1979 | Jun 9 | Sep 12 | Jun 7 | Sep 14 |
| 1978 | Jul 22 | Aug 19 | Jun 1 | Sep 13 |
| 1977 | no data | Sep 9 | no data | Sep 18 |
| 1968 | May 31 | no data | May 27 | no data |
| 1967 | Jul 30 | Sep 28 | Jul 30 | Oct 13 |
| 1966 | Jun 25 | Aug 10 | Jun 15 | Aug 20 |
| 1965 | Jul 5 | Aug 23 | May 28 | Sep 16 |
| 1964 | Jun 28 | Aug 20 | Jun 2 | Sep 27 |
| 1963 | May 27 | Oct 16 | May 21 | Oct 27 |
| 1962 | Jun 16 | Aug 24 | May 16 | Sep 9 |
| 1961 | May 26 | Sep 2 | May 13 | Sep 22 |
| 1960 | no data | Sep 24 | no data | Oct 13 |
| 1959 | Jul 1 | no data | May 23 | no data |
| 1958 | Jun 25 | Sep 15 | May 2 | Sep 16 |
| 1957 | Jun 23 | Sep 2 | May 23 | Sep 11 |
| 1956 | May 15 | Aug 31 | May 15 | Aug 31 |
| 1955 | Jun 9 | Sep 22 | Jun 9 | Sep 23 |
| 1954 | Jun 12 | no data | Jun 3 | no data |
| 1953 | Jun 25 | Sep 4 | May 25 | Sep 4 |
| 1952 | Jul 20 | Sep 14 | May 18 | Sep 14 |
| 1951 | Jun 30 | Sep 9 | Jun 4 | Sep 12 |
"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.