Cheyenne Wfo, WY: frost dates by year

Last spring and first fall frost at NOAA station USC00481676, 2003 to 2023, measured from daily minimum temperatures.

Elevation 6,119 ft, 41.152, -104.806. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 13	Oct 5
Earliest	Apr 27 (2018)	Sep 7 (2020)
Latest	Jun 8 (2007)	Oct 26 (2004)
Trend	5.3 days earlier per decade	2.5 days earlier per decade
Years with data	19	20

At 28°F (hard freeze) the median last spring date is May 11 and the median first fall date is Oct 8.

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
2023	Apr 28	Oct 7	Apr 23	Oct 13
2022	May 22	Oct 8	May 22	Oct 17
2021	May 11	Oct 12	Apr 23	Oct 12
2020	May 11	Sep 7	May 11	Sep 8
2019	May 22	Oct 3	May 21	Oct 7
2018	Apr 27	Oct 5	Apr 25	Oct 9
2017	May 20	Oct 2	May 19	Oct 3
2016	May 17	Oct 5	May 2	Oct 7
2015	May 20	Oct 23	May 20	Oct 28
2014	May 14	Sep 11	May 13	Sep 11
2013	May 6	Sep 28	May 3	Oct 4
2012	May 11	Oct 3	Apr 20	Oct 3
2011	May 19	Oct 8	May 5	Oct 19
2010	May 13	Oct 25	May 13	Oct 27
2008	May 11	Oct 10	May 10	Oct 12
2007	Jun 8	Oct 15	Apr 20	Oct 21
2006	May 11	Sep 23	May 11	Sep 24
2005	May 13	Oct 6	May 12	Oct 6
2004	May 25	Oct 26	May 13	Oct 31
2003	no data	Sep 17	no data	Sep 18

"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.