Denio 52 Wsw, NV: frost dates by year

Last spring and first fall frost at NOAA station USW00004139, 2008 to 2024, measured from daily minimum temperatures.

Elevation 6,500 ft, 41.848, -119.636. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Jun 19	Sep 11
Earliest	May 11 (2023)	Aug 26 (2008)
Latest	Jul 11 (2016)	Oct 22 (2022)
Trend	10.3 days earlier per decade	12.7 days later per decade
Years with data	16	17

At 28°F (hard freeze) the median last spring date is Jun 12 and the median first fall date is Oct 1.

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	Jun 18	Sep 30	Jun 18	Oct 17
2023	May 11	Sep 20	May 10	Oct 12
2022	Jun 20	Oct 22	Jun 14	Oct 22
2021	Jun 10	Sep 19	Jun 8	Sep 28
2020	Jul 1	Sep 8	Jul 1	Oct 11
2019	Jun 27	Sep 11	Jun 21	Sep 28
2018	Jun 10	Aug 28	Jun 10	Oct 9
2017	Jun 11	Sep 15	May 25	Sep 21
2016	Jul 11	Sep 5	May 10	Oct 1
2015	May 17	Sep 4	May 13	Sep 5
2014	Jun 18	Sep 4	Jun 18	Oct 1
2013	Jun 22	Sep 24	Jun 21	Oct 2
2012	Jun 26	Oct 4	Jun 19	Oct 16
2011	Jun 16	Sep 17	Jun 8	Oct 5
2010	Jul 3	Sep 5	Jun 17	Sep 6
2009	Jun 22	Sep 7	May 15	Sep 29
2008	no data	Aug 26	no data	Sep 1

"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.