Frost history / Lukachukai, AZ
Lukachukai, AZ: frost dates by year
Last spring and first fall frost at NOAA station USC00025129, 1952 to 2008, measured from daily minimum temperatures.
Elevation 6,520 ft, 36.419, -109.227. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 16 | Oct 15 |
| Earliest | Apr 5 (1981) | Sep 17 (1968) |
| Latest | Jun 15 (1976) | Nov 9 (1983) |
| Trend | 3.0 days earlier per decade | 2.1 days later per decade |
| Years with data | 30 | 32 |
At 28°F (hard freeze) the median last spring date is Apr 29 and the median first fall date is Oct 19.
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 |
|---|---|---|---|---|
| 2008 | May 5 | no data | May 5 | no data |
| 2006 | no data | Sep 17 | no data | Sep 23 |
| 2005 | no data | Oct 31 | no data | Oct 31 |
| 1996 | Apr 29 | no data | Apr 29 | no data |
| 1995 | May 18 | Oct 5 | Apr 24 | Oct 5 |
| 1994 | May 1 | Oct 16 | Apr 27 | Nov 4 |
| 1993 | May 9 | Oct 19 | Apr 15 | Oct 30 |
| 1992 | Apr 21 | Nov 1 | Apr 20 | Nov 1 |
| 1991 | May 16 | Oct 28 | Apr 30 | Oct 28 |
| 1990 | no data | Oct 10 | no data | Oct 10 |
| 1989 | Apr 28 | Oct 18 | Apr 28 | Oct 26 |
| 1988 | May 30 | Nov 5 | May 3 | Nov 12 |
| 1987 | no data | Nov 8 | no data | Nov 12 |
| 1986 | May 9 | Oct 4 | Apr 27 | Oct 13 |
| 1985 | Apr 27 | Sep 29 | Apr 1 | Oct 15 |
| 1984 | May 8 | no data | Apr 29 | no data |
| 1983 | no data | Nov 9 | no data | Nov 9 |
| 1982 | May 12 | no data | Apr 21 | no data |
| 1981 | Apr 5 | Oct 16 | Apr 5 | Oct 16 |
| 1980 | May 25 | Oct 16 | May 25 | Oct 17 |
| 1979 | no data | Oct 21 | no data | Oct 22 |
| 1978 | May 18 | no data | May 6 | no data |
| 1977 | May 19 | no data | May 18 | no data |
| 1976 | Jun 15 | Oct 5 | Apr 27 | Oct 8 |
| 1975 | no data | Oct 8 | no data | Oct 8 |
| 1974 | Jun 8 | Sep 28 | May 20 | Nov 4 |
| 1973 | May 27 | Sep 27 | Apr 30 | Oct 11 |
| 1972 | May 27 | Oct 30 | Apr 21 | Oct 30 |
| 1971 | May 18 | Sep 18 | May 18 | Sep 18 |
| 1970 | Jun 11 | Sep 25 | May 2 | Sep 27 |
| 1969 | Jun 2 | Oct 4 | May 9 | Oct 4 |
| 1968 | no data | Sep 17 | no data | Oct 4 |
| 1967 | May 15 | no data | May 2 | no data |
| 1963 | May 12 | Nov 2 | Apr 27 | Nov 18 |
| 1961 | no data | Oct 2 | no data | Oct 2 |
| 1957 | May 21 | no data | Apr 30 | no data |
| 1956 | May 15 | no data | Apr 9 | no data |
| 1955 | May 16 | Sep 25 | May 3 | Oct 8 |
| 1954 | Apr 15 | Oct 15 | Apr 1 | Oct 25 |
| 1953 | no data | Oct 22 | no data | Oct 24 |
| 1952 | no data | Oct 15 | no data | Nov 4 |
"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.