Frost history / Grand Canyon Visitor Ctr, AZ
Grand Canyon Visitor Ctr, AZ: frost dates by year
Last spring and first fall frost at NOAA station USC00023582, 2012 to 2025, measured from daily minimum temperatures.
Elevation 7,083 ft, 36.060, -112.110. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 8 | Oct 24 |
| Earliest | Apr 18 (2012) | Sep 24 (2017) |
| Latest | May 28 (2019) | Nov 17 (2016) |
| Trend | little change (less than half a day per decade) | 12.6 days earlier per decade |
| Years with data | 10 | 10 |
At 28°F (hard freeze) the median last spring date is Apr 27 and the median first fall date is Nov 2.
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 | Apr 28 | no data | Apr 28 | no data |
| 2024 | May 6 | Oct 19 | May 6 | Oct 31 |
| 2022 | no data | Oct 23 | no data | Oct 23 |
| 2021 | no data | Oct 12 | no data | Oct 12 |
| 2019 | May 28 | Oct 28 | May 3 | Oct 28 |
| 2018 | May 3 | Oct 15 | Apr 20 | Oct 16 |
| 2017 | May 19 | Sep 24 | Apr 4 | Nov 18 |
| 2016 | May 9 | Nov 17 | Apr 26 | Nov 17 |
| 2015 | May 16 | Nov 4 | May 10 | Nov 5 |
| 2014 | May 14 | Nov 2 | Apr 28 | Nov 3 |
| 2013 | May 8 | no data | Apr 20 | no data |
| 2012 | Apr 18 | Oct 25 | Apr 15 | Nov 10 |
"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.