Hays, KS: frost dates by year

Last spring and first fall frost at NOAA station USC00143523, 1969 to 2024, measured from daily minimum temperatures.

Elevation 1,990 ft, 38.867, -99.317. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 16	Oct 19
Earliest	Mar 11 (2012)	Oct 6 (1991)
Latest	May 4 (2013)	Nov 13 (2021)
Trend	0.9 days earlier per decade	1.9 days later per decade
Years with data	17	21

At 28°F (hard freeze) the median last spring date is Apr 6 and the median first fall date is Oct 30.

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	Mar 27	Oct 16	Mar 27	Nov 26
2023	Apr 24	Oct 28	Apr 6	Oct 30
2022	Apr 16	Oct 19	Apr 15	Oct 19
2021	no data	Nov 13	no data	Nov 13
2020	Apr 15	Oct 23	Apr 15	Oct 24
2019	Apr 29	Oct 11	Apr 12	Oct 11
2018	Apr 20	Oct 15	Apr 17	Oct 15
2017	May 1	Oct 22	Mar 16	Oct 28
2016	Apr 13	Nov 12	Mar 28	Nov 19
2015	Mar 27	Nov 13	Mar 7	Nov 21
2014	Apr 16	no data	Apr 16	no data
2013	May 4	Nov 6	Apr 25	Nov 12
2012	Mar 11	Oct 7	Mar 4	Oct 27
2011	Mar 29	Oct 29	Mar 25	Nov 17
1994	Apr 30	Oct 10	Apr 7	Nov 6
1993	Apr 17	Oct 27	Apr 3	Oct 28
1992	Apr 3	Oct 17	Apr 2	Nov 5
1991	no data	Oct 6	no data	Oct 19
1972	no data	Oct 19	no data	Oct 19
1971	no data	Oct 30	no data	Oct 31
1970	Apr 21	Oct 12	Apr 14	Nov 5
1969	no data	Oct 12	no data	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.