Boonton 1 Se, NJ: frost dates by year

Last spring and first fall frost at NOAA station USC00280907, 1951 to 2025, measured from daily minimum temperatures.

Elevation 280 ft, 40.892, -74.396. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 20	Oct 18
Earliest	Mar 29 (2010)	Sep 24 (1953)
Latest	May 25 (1956)	Nov 9 (2017)
Trend	1.3 days earlier per decade	2.6 days later per decade
Years with data	65	65

At 28°F (hard freeze) the median last spring date is Apr 6 and the median first fall date is Oct 29.

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