Globe #3, AZ: frost dates by year

Last spring and first fall frost at NOAA station USC00023501, 2009 to 2025, measured from daily minimum temperatures.

Elevation 3,660 ft, 33.395, -110.793. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Mar 14	Nov 11
Earliest	Feb 6 (2014)	Oct 28 (2020)
Latest	Apr 10 (2011)	Dec 11 (2021)
Trend	14.8 days later per decade	7.6 days later per decade
Years with data	15	17

At 28°F (hard freeze) the median last spring date is Feb 27 and the median first fall date is Dec 4.

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	Mar 20	Dec 4	Jan 31	none
2024	Apr 7	Nov 7	Feb 12	Nov 8
2023	Apr 5	Nov 26	Apr 5	Dec 26
2022	Mar 12	Nov 4	Mar 8	Dec 14
2021	Mar 17	Dec 11	Mar 17	Dec 16
2020	Mar 28	Oct 28	Feb 13	Dec 4
2019	Mar 14	Oct 31	Mar 14	Oct 31
2018	Mar 1	Nov 12	Mar 1	Dec 3
2017	no data	Dec 8	no data	Dec 22
2016	Feb 7	Nov 28	Feb 6	Nov 30
2015	Mar 5	Nov 11	Jan 4	Nov 28
2014	Feb 6	Nov 17	Feb 6	Nov 17
2013	Mar 9	Nov 24	Feb 27	Dec 6
2012	Mar 20	Nov 11	Mar 3	Nov 11
2011	Apr 10	Nov 8	Feb 28	Dec 5
2010	Feb 24	Nov 10	Jan 25	Nov 23
2009	no data	Oct 29	no data	Dec 4

"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.