Joshua Tree, CA: frost dates by year

Last spring and first fall frost at NOAA station USC00044405, 2009 to 2025, measured from daily minimum temperatures.

Elevation 2,563 ft, 34.147, -116.275. Download the data (JSON) · NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Mar 18	Nov 26
Earliest	Jan 4 (2015)	Oct 30 (2019)
Latest	Apr 13 (2022)	Dec 27 (2014)
Trend	4.8 days later per decade	7.2 days later per decade
Years with data	17	16, 1 with no freeze

At 28°F (hard freeze) the median last spring date is Feb 14 and the median first fall date is Dec 5.

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 22	none
2024	Apr 7	Dec 10	Jan 12	none
2023	Apr 5	Nov 24	Feb 17	Nov 26
2022	Apr 13	no data	Mar 6	no data
2021	Mar 17	Dec 8	Feb 1	Dec 10
2020	Mar 28	Nov 9	Feb 5	Nov 9
2019	Mar 22	Oct 30	Feb 23	Nov 30
2018	Mar 18	Dec 5	Feb 26	Dec 30
2017	Mar 7	Dec 21	Feb 24	none
2016	Feb 4	Nov 28	Feb 3	Dec 18
2015	Jan 4	Nov 26	Jan 2	Dec 15
2014	Feb 5	Dec 27	none	Dec 27
2013	Feb 27	Dec 5	Feb 21	Dec 5
2012	Mar 20	Nov 10	Jan 17	Nov 11
2011	Mar 24	Nov 7	Feb 27	Dec 6
2010	Apr 13	Nov 22	none	Nov 25
2009	Mar 10	Nov 15	Feb 14	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 1991–2020 frost probabilities.