Sussex Ap, NJ: frost dates by year

Last spring and first fall frost at NOAA station USW00054793, 2001 to 2024, measured from daily minimum temperatures.

Elevation 421 ft, 41.200, -74.623. Download the data (JSON) · NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 2	Oct 13
Earliest	Apr 16 (2004)	Sep 21 (2020)
Latest	May 22 (2002)	Nov 3 (2021)
Trend	2.8 days earlier per decade	3.5 days later per decade
Years with data	24	24

At 28°F (hard freeze) the median last spring date is Apr 15 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
2024	Apr 26	Oct 17	Mar 24	Oct 17
2023	May 18	Nov 1	Apr 9	Nov 2
2022	May 1	Oct 9	Apr 18	Oct 29
2021	Apr 24	Nov 3	Apr 3	Nov 4
2020	May 21	Sep 21	Apr 19	Oct 31
2019	Apr 29	Oct 5	Apr 4	Nov 2
2018	May 1	Oct 18	Apr 22	Nov 11
2017	May 4	Oct 17	Apr 9	Nov 9
2016	Apr 17	Oct 11	Apr 13	Oct 26
2015	Apr 26	Oct 17	Apr 25	Oct 17
2014	Apr 25	Oct 20	Apr 10	Nov 13
2013	May 14	Oct 21	Apr 4	Oct 24
2012	Apr 30	Oct 12	Apr 30	Oct 13
2011	Apr 22	Oct 28	Apr 22	Oct 30
2010	May 11	Oct 10	Mar 28	Nov 2
2009	May 19	Oct 11	Apr 16	Oct 19
2008	May 1	Oct 4	May 1	Oct 19
2007	May 14	Oct 13	Apr 11	Nov 7
2006	May 7	Oct 13	Apr 10	Oct 16
2005	May 13	Oct 23	Apr 16	Oct 28
2004	Apr 16	Oct 6	Apr 16	Nov 4
2003	May 4	Oct 3	Apr 14	Oct 24
2002	May 22	Oct 14	Apr 27	Oct 15
2001	May 7	Oct 7	Apr 29	Oct 9

"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 1991–2020 frost probabilities.