Frost history / Bisbee 1WNW, AZ
Bisbee 1WNW, AZ: frost dates by year
Last spring and first fall frost at NOAA station USC00020775, 1985 to 2018, measured from daily minimum temperatures.
Elevation 5,560 ft, 31.448, -109.929. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 12 | Nov 8 |
| Earliest | Mar 6 (2015) | Oct 7 (2004) |
| Latest | May 3 (1988) | Nov 30 (2006) |
| Trend | 7.9 days earlier per decade | 4.3 days later per decade |
| Years with data | 22 | 22 |
At 28°F (hard freeze) the median last spring date is Mar 19 and the median first fall date is Nov 15.
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 |
|---|---|---|---|---|
| 2018 | Mar 28 | Nov 3 | Mar 1 | Nov 12 |
| 2016 | Apr 19 | no data | Feb 7 | no data |
| 2015 | Mar 6 | no data | Jan 24 | no data |
| 2014 | Mar 16 | Nov 17 | Feb 6 | Nov 18 |
| 2012 | no data | Nov 11 | no data | Nov 11 |
| 2010 | Apr 23 | Nov 12 | Mar 21 | Nov 12 |
| 2009 | Apr 17 | no data | Feb 20 | no data |
| 2008 | no data | Nov 6 | no data | Dec 10 |
| 2007 | Mar 30 | Nov 25 | Mar 29 | Nov 25 |
| 2006 | Mar 25 | Nov 30 | Mar 20 | Nov 30 |
| 2005 | Apr 2 | Nov 19 | Mar 16 | Nov 28 |
| 2004 | Apr 12 | Oct 7 | Mar 1 | Oct 7 |
| 2003 | Apr 23 | Nov 23 | Mar 6 | Nov 23 |
| 2002 | Mar 25 | Nov 5 | Mar 15 | Nov 27 |
| 2001 | Apr 22 | Nov 24 | Apr 11 | Nov 27 |
| 2000 | Apr 1 | Nov 1 | Mar 21 | Nov 8 |
| 1999 | Apr 11 | Oct 18 | Apr 5 | Nov 23 |
| 1998 | Apr 18 | Nov 10 | Apr 3 | Nov 10 |
| 1991 | Apr 29 | Oct 28 | Apr 13 | Oct 29 |
| 1990 | Apr 3 | Oct 10 | Mar 17 | Nov 4 |
| 1989 | Apr 28 | Oct 28 | Mar 6 | Oct 30 |
| 1988 | May 3 | Nov 16 | May 2 | Nov 16 |
| 1987 | Apr 8 | Nov 11 | Mar 31 | Nov 11 |
| 1986 | Apr 19 | Nov 5 | Apr 4 | Nov 23 |
| 1985 | no data | Nov 2 | no data | Nov 14 |
"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.