Wallace, KS: frost dates by year

Last spring and first fall frost at NOAA station USC00148535, 2004 to 2025, measured from daily minimum temperatures.

Elevation 3,311 ft, 38.911, -101.585. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 1	Oct 13
Earliest	Apr 11 (2009)	Sep 12 (2014)
Latest	May 16 (2011)	Oct 26 (2024)
Trend	7.0 days earlier per decade	1.7 days later per decade
Years with data	22	22

At 28°F (hard freeze) the median last spring date is Apr 20 and the median first fall date is Oct 18.

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	Apr 21	Oct 19	Apr 16	Oct 29
2024	Apr 20	Oct 26	Apr 10	Oct 31
2023	May 1	Oct 7	Apr 25	Oct 15
2022	May 1	Oct 15	Apr 26	Oct 17
2021	Apr 23	Oct 16	Apr 21	Oct 16
2020	Apr 30	Oct 16	Apr 18	Oct 20
2019	Apr 23	Oct 6	Apr 20	Oct 11
2018	Apr 27	Oct 11	Apr 20	Oct 15
2017	May 4	Oct 10	Apr 6	Oct 22
2016	May 2	Oct 7	May 2	Oct 7
2015	Apr 22	Oct 16	Apr 10	Oct 29
2014	May 14	Sep 12	May 2	Oct 29
2013	May 6	Oct 5	May 5	Nov 2
2012	Apr 17	Oct 8	Mar 20	Oct 10
2011	May 16	Oct 19	Apr 16	Oct 27
2010	May 14	Oct 17	Apr 27	Oct 27
2009	Apr 11	Oct 2	Apr 11	Oct 3
2008	May 12	Oct 23	May 11	Oct 24
2007	Apr 27	Oct 16	Apr 26	Oct 16
2006	May 16	Oct 13	Apr 26	Oct 19
2005	May 3	Oct 7	Apr 30	Oct 7
2004	May 14	Oct 14	Apr 14	Oct 14

"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.