E Mesa, AZ: frost dates by year

Last spring and first fall frost at NOAA station USC00022782, 2002 to 2025, measured from daily minimum temperatures.

Elevation 1,518 ft, 33.419, -111.644. Download the data (JSON) · NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Feb 12	Dec 14
Earliest	Jan 13 (2005)	Nov 27 (2010)
Latest	Apr 5 (2023)	Dec 29 (2019)
Trend	3.3 days later per decade	5.2 days later per decade
Years with data	19, 2 with no freeze	24, 4 with no freeze

At 28°F (hard freeze) the median last spring date is Jan 24 and the median first fall date is Dec 12.

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	Jan 22	none	Jan 14	none
2024	Jan 15	none	Jan 13	none
2023	Apr 5	none	Jan 24	none
2022	Feb 24	Dec 14	none	none
2021	Jan 27	Dec 16	none	none
2020	Feb 7	Dec 15	Feb 4	none
2019	Feb 23	Dec 29	Feb 20	none
2018	Feb 26	Dec 28	none	none
2017	Feb 25	Dec 22	none	Dec 22
2016	Feb 3	none	Feb 3	none
2015	no data	Nov 29	no data	Dec 16
2014	none	Dec 26	none	Dec 26
2013	Feb 26	Dec 6	Jan 15	Dec 7
2012	none	Dec 11	none	none
2011	Feb 6	Dec 7	Feb 5	none
2010	Feb 23	Nov 27	none	Nov 29
2009	Feb 13	Dec 4	none	Dec 5
2008	no data	Dec 21	no data	Dec 27
2007	no data	Dec 15	no data	Dec 22
2006	no data	Nov 30	no data	Nov 30
2005	Jan 13	Nov 28	none	Dec 6
2004	Feb 12	Nov 29	Jan 5	Nov 30
2003	Feb 10	Dec 28	none	Dec 29
2002	no data	Dec 20	no data	none

"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.