Wellsville, NY: frost dates by year

Last spring and first fall frost at NOAA station USC00309072, 2004 to 2025, measured from daily minimum temperatures.

Elevation 1,510 ft, 42.117, -77.948. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 19	Oct 10
Earliest	Apr 27 (2024)	Sep 19 (2020)
Latest	Jun 15 (2020)	Oct 29 (2007)
Trend	5.3 days earlier per decade	0.8 days later per decade
Years with data	21	22

At 28°F (hard freeze) the median last spring date is May 2 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	May 11	Oct 10	Apr 18	Oct 10
2024	Apr 27	Oct 11	Apr 27	Oct 19
2023	May 27	Oct 20	May 19	Nov 12
2022	May 10	Oct 11	May 1	Oct 21
2021	May 15	Oct 19	Apr 24	Nov 5
2020	Jun 15	Sep 19	May 14	Sep 22
2019	Apr 30	Oct 6	Apr 30	Oct 19
2018	May 2	Oct 17	May 1	Oct 19
2017	May 10	Oct 1	Apr 24	Oct 17
2016	May 20	Oct 11	Apr 25	Oct 12
2015	May 24	Oct 12	May 24	Oct 19
2014	May 20	Oct 5	May 18	Oct 12
2013	May 28	Oct 10	May 15	Oct 28
2012	May 18	Sep 21	May 1	Oct 13
2011	May 10	Oct 6	Apr 23	Oct 28
2010	May 12	Oct 10	May 12	Oct 10
2009	May 20	Oct 2	May 20	Oct 12
2008	May 30	Oct 4	May 2	Oct 7
2007	May 21	Oct 29	May 7	Oct 29
2006	May 25	Sep 30	May 8	Oct 16
2005	May 19	Oct 21	May 14	Oct 28
2004	no data	Oct 5	no data	Oct 7

"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.