Shippensburg, PA: frost dates by year

Last spring and first fall frost at NOAA station USC00368073, 1951 to 2025, measured from daily minimum temperatures.

Elevation 680 ft, 40.059, -77.521. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 21	Oct 21
Earliest	Mar 31 (2011)	Sep 21 (1956)
Latest	May 25 (1956)	Nov 17 (1970)
Trend	0.5 days earlier per decade	2.1 days later per decade
Years with data	73	75

At 28°F (hard freeze) the median last spring date is Apr 9 and the median first fall date is Nov 4.

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 9	Oct 26	Apr 9	Nov 7
2024	Apr 22	Oct 17	Mar 25	Nov 13
2023	Apr 25	Oct 31	Apr 9	Nov 2
2022	Apr 30	Oct 21	Apr 18	Oct 30
2021	Apr 23	Nov 2	Apr 3	Nov 4
2020	May 9	Oct 17	Apr 17	Nov 18
2019	Apr 29	Nov 1	Apr 3	Nov 2
2018	Apr 21	Oct 25	Apr 11	Nov 11
2017	May 8	Nov 7	Mar 24	Nov 10
2016	Apr 15	Oct 26	Apr 10	Oct 26
2015	Apr 25	Oct 18	Apr 2	Oct 19
2014	Apr 18	Nov 8	Apr 17	Nov 13
2013	May 14	Oct 28	Apr 4	Nov 4
2012	Apr 13	Oct 13	Mar 27	Oct 13
2011	Mar 31	Oct 29	Mar 30	Oct 30
2010	Apr 14	Nov 1	Mar 27	Nov 2
2009	Apr 13	Oct 19	Apr 13	Nov 7
2008	Apr 15	Oct 19	Apr 3	Oct 23
2007	Apr 11	Oct 29	Apr 11	Nov 8
2006	Apr 10	Nov 3	Mar 22	Nov 4
2005	Apr 16	Nov 13	Mar 22	Nov 17
2004	Apr 16	Nov 9	Apr 6	Nov 10
2003	Apr 9	Oct 24	Apr 1	Nov 9
2002	Apr 24	Oct 30	Apr 7	Nov 27
2001	Apr 26	Oct 8	Apr 19	Oct 9
2000	Apr 14	Oct 31	Apr 13	Nov 6
1999	Apr 25	Oct 28	Mar 27	Nov 17
1998	Apr 11	Nov 3	Mar 25	Nov 5
1997	Apr 22	Oct 21	Apr 10	Nov 6
1996	May 14	Oct 4	Apr 10	Nov 4
1995	Apr 6	Nov 4	Apr 5	Nov 5
1994	Apr 23	Oct 12	Apr 8	Nov 12
1993	Apr 22	Oct 1	Apr 7	Nov 8
1992	Apr 13	Oct 6	Apr 13	Oct 20
1991	Apr 4	Oct 14	Apr 3	Oct 21
1990	Apr 19	Oct 20	Apr 13	Nov 9
1989	Apr 24	Oct 10	Apr 14	Nov 4
1988	Apr 22	Oct 9	Mar 23	Oct 27
1987	Apr 3	Oct 9	Apr 1	Oct 26
1986	Apr 23	Oct 11	Apr 14	Nov 13
1985	Apr 10	Oct 29	Apr 10	Oct 29
1984	Apr 11	Nov 3	Mar 24	Nov 7
1983	Apr 20	Oct 22	Apr 17	Oct 30
1982	Apr 15	Oct 17	Apr 10	Oct 18
1981	Apr 22	Oct 13	Apr 21	Oct 20
1980	Apr 17	Oct 23	Apr 17	Oct 23
1979	Apr 20	Oct 30	Apr 7	Nov 5
1978	Apr 23	Oct 16	Mar 30	Oct 25
1977	Apr 29	Oct 31	Apr 9	Nov 13
1976	Apr 13	Oct 12	Apr 12	Oct 19
1975	Apr 23	Oct 31	Apr 22	Oct 31
1974	May 8	Sep 24	May 8	Oct 4
1973	Apr 15	Nov 6	Apr 15	Nov 8
1972	Apr 26	Oct 11	Apr 10	Oct 20
1971	Apr 15	Nov 5	Mar 31	Nov 8
1970	Apr 11	Nov 17	Apr 6	Nov 18
1969	no data	Oct 23	no data	Oct 23
1968	May 7	Oct 6	Apr 7	Oct 31
1967	Apr 13	Oct 22	Apr 12	Oct 29
1966	May 11	Oct 18	May 11	Oct 18
1965	no data	Oct 6	no data	Oct 29
1964	Apr 10	Oct 7	Apr 5	Oct 12
1963	May 12	Sep 24	Apr 16	Nov 20
1962	May 10	Oct 26	Apr 17	Oct 30
1961	Apr 30	Oct 23	Apr 20	Nov 11
1960	May 2	Oct 21	Apr 11	Oct 26
1959	Apr 22	Oct 19	Apr 13	Oct 29
1958	Apr 10	Oct 6	Apr 9	Nov 8
1957	May 4	Sep 27	Apr 15	Nov 7
1956	May 25	Sep 21	Apr 25	Nov 11
1955	Apr 8	Oct 23	Mar 31	Nov 6
1954	Apr 10	Oct 8	Apr 4	Nov 1
1953	Apr 22	Oct 8	Mar 21	Nov 5
1952	Apr 10	Oct 8	Mar 30	Oct 21
1951	Apr 21	Nov 3	Mar 27	Nov 4

"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.