Frost history / Nogales Intl Ap, AZ
Nogales Intl Ap, AZ: frost dates by year
Last spring and first fall frost at NOAA station USW00003196, 1999 to 2024, measured from daily minimum temperatures.
Elevation 3,932 ft, 31.421, -110.846. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 25 | Nov 11 |
| Earliest | Feb 12 (2014) | Oct 13 (2008) |
| Latest | Apr 16 (2009) | Dec 16 (2017) |
| Trend | 0.7 days earlier per decade | 3.1 days later per decade |
| Years with data | 25 | 26 |
At 28°F (hard freeze) the median last spring date is Feb 26 and the median first fall date is Nov 28.
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 |
|---|---|---|---|---|
| 2024 | Apr 7 | Nov 5 | Jan 13 | Nov 8 |
| 2023 | Apr 6 | Dec 2 | Apr 5 | none |
| 2022 | Apr 13 | Oct 25 | Mar 9 | Nov 26 |
| 2021 | Mar 25 | Dec 11 | Mar 17 | Dec 18 |
| 2020 | Mar 28 | Oct 27 | Feb 6 | Oct 27 |
| 2019 | Mar 15 | Dec 1 | Feb 24 | Dec 17 |
| 2018 | Mar 2 | Nov 12 | Mar 1 | Dec 14 |
| 2017 | Mar 7 | Dec 16 | Feb 25 | Dec 21 |
| 2016 | Apr 1 | Nov 29 | Feb 5 | Nov 30 |
| 2015 | Mar 5 | Nov 11 | Jan 4 | Nov 17 |
| 2014 | Feb 12 | Nov 4 | Feb 2 | Nov 24 |
| 2013 | Mar 11 | Dec 6 | Feb 28 | Dec 6 |
| 2012 | Apr 15 | Nov 11 | Mar 20 | Dec 11 |
| 2011 | Apr 11 | Nov 8 | Feb 28 | Nov 8 |
| 2010 | Mar 12 | Nov 10 | Jan 24 | Nov 29 |
| 2009 | Apr 16 | Oct 28 | Feb 13 | Oct 29 |
| 2008 | Mar 19 | Oct 13 | Feb 7 | Dec 21 |
| 2007 | Mar 29 | Nov 25 | Mar 2 | Dec 15 |
| 2006 | Mar 22 | Nov 29 | Mar 20 | Nov 30 |
| 2005 | Mar 17 | Nov 19 | Jan 31 | Nov 28 |
| 2004 | Mar 1 | Nov 2 | Feb 28 | Nov 25 |
| 2003 | Apr 6 | Nov 5 | Feb 10 | Nov 23 |
| 2002 | Mar 25 | Nov 5 | Mar 17 | Dec 19 |
| 2001 | Apr 11 | Nov 24 | Apr 11 | Nov 27 |
| 2000 | Apr 1 | Nov 7 | Feb 26 | Nov 13 |
| 1999 | no data | Nov 23 | no data | Nov 23 |
"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 1991–2020 frost probabilities.