Frost history / Painted Rock Dam, AZ
Painted Rock Dam, AZ: frost dates by year
Last spring and first fall frost at NOAA station USC00026194, 2004 to 2023, measured from daily minimum temperatures.
Elevation 568 ft, 33.077, -113.032. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 9 | Dec 15 |
| Earliest | Jan 4 (2015) | Nov 27 (2010) |
| Latest | Feb 25 (2018) | Dec 31 (2016) |
| Trend | 5.8 days later per decade | 3.0 days later per decade |
| Years with data | 16, 4 with no freeze | 15 |
At 28°F (hard freeze) the median last spring date is Jan 4 and the median first fall date is Dec 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 |
|---|---|---|---|---|
| 2023 | Feb 16 | no data | none | no data |
| 2022 | Feb 24 | Dec 10 | none | none |
| 2021 | Jan 28 | Dec 16 | none | none |
| 2020 | no data | Dec 4 | no data | none |
| 2019 | Feb 23 | no data | Jan 4 | no data |
| 2018 | Feb 25 | Dec 30 | none | none |
| 2017 | none | Dec 22 | none | none |
| 2016 | Feb 4 | Dec 31 | Jan 1 | none |
| 2015 | Jan 4 | Nov 30 | Jan 3 | Dec 17 |
| 2014 | none | Dec 26 | none | Dec 27 |
| 2013 | Feb 13 | Dec 6 | Jan 15 | none |
| 2012 | Jan 13 | Dec 27 | none | none |
| 2011 | Feb 5 | Dec 5 | Feb 4 | none |
| 2010 | none | Nov 27 | none | Nov 27 |
| 2009 | no data | Dec 5 | no data | Dec 25 |
| 2007 | no data | Dec 15 | no data | Dec 26 |
| 2006 | Feb 22 | Dec 19 | none | Dec 20 |
| 2005 | none | no data | none | no data |
| 2004 | Feb 2 | no data | Jan 5 | no data |
"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.