Frost history / Bullhead City, AZ
Bullhead City, AZ: frost dates by year
Last spring and first fall frost at NOAA station USC00021050, 1978 to 2025, measured from daily minimum temperatures.
Elevation 531 ft, 35.141, -114.569. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jan 22 | Dec 13 |
| Earliest | Jan 1 (2011) | Nov 20 (1994) |
| Latest | Mar 15 (1988) | Dec 25 (2002) |
| Trend | 6.5 days earlier per decade | little change (less than half a day per decade) |
| Years with data | 36, 18 with no freeze | 35, 18 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 3 and the median first fall date is Dec 18.
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 |
|---|---|---|---|---|
| 2025 | none | none | none | none |
| 2024 | Jan 13 | none | none | none |
| 2023 | none | none | none | none |
| 2017 | none | no data | none | no data |
| 2016 | none | none | none | none |
| 2011 | Jan 1 | no data | Jan 1 | no data |
| 2010 | none | Nov 27 | none | none |
| 2009 | none | Dec 5 | none | none |
| 2008 | Feb 1 | none | none | none |
| 2007 | Jan 17 | none | Jan 17 | none |
| 2006 | none | Dec 20 | none | none |
| 2005 | no data | Dec 19 | no data | none |
| 2002 | Jan 19 | Dec 25 | none | none |
| 2001 | none | none | none | none |
| 2000 | Jan 3 | none | none | none |
| 1999 | none | none | none | none |
| 1998 | none | none | none | none |
| 1997 | none | none | none | none |
| 1996 | Jan 23 | none | none | none |
| 1995 | none | none | none | none |
| 1994 | Jan 9 | Nov 20 | none | none |
| 1993 | Jan 5 | none | none | none |
| 1992 | none | Dec 15 | none | none |
| 1991 | none | Dec 2 | none | none |
| 1990 | Feb 16 | Dec 21 | none | Dec 21 |
| 1989 | Feb 7 | none | Feb 7 | none |
| 1988 | Mar 15 | Dec 22 | Mar 15 | Dec 31 |
| 1987 | Jan 15 | Dec 15 | none | Dec 15 |
| 1986 | Feb 7 | Dec 12 | none | none |
| 1985 | Feb 7 | Dec 13 | Feb 7 | none |
| 1984 | none | Dec 13 | none | Dec 18 |
| 1983 | Jan 22 | Nov 23 | none | none |
| 1982 | Jan 23 | Dec 17 | none | none |
| 1981 | none | none | none | none |
| 1980 | none | none | none | none |
| 1979 | Jan 31 | none | Jan 31 | none |
| 1978 | none | Dec 7 | none | Dec 7 |
"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.