Durham 2 Ssw, NH: frost dates by year

Last spring and first fall frost at NOAA station USW00054795, 2002 to 2024, measured from daily minimum temperatures.

Elevation 63 ft, 43.109, -70.948. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 5	Oct 9
Earliest	Apr 22 (2021)	Sep 19 (2014)
Latest	May 18 (2023)	Oct 31 (2023)
Trend	2.6 days earlier per decade	2.5 days later per decade
Years with data	22	23

At 28°F (hard freeze) the median last spring date is Apr 22 and the median first fall date is Oct 20.

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 27	Oct 16	Apr 27	Oct 17
2023	May 18	Oct 31	May 18	Nov 2
2022	May 9	Oct 9	Apr 21	Oct 29
2021	Apr 22	Oct 29	Apr 4	Nov 4
2020	May 14	Sep 20	Apr 23	Oct 18
2019	May 9	Oct 5	Apr 18	Nov 2
2018	Apr 24	Oct 14	Apr 23	Oct 18
2017	May 9	Oct 13	Apr 15	Nov 8
2016	Apr 30	Oct 6	Apr 28	Oct 27
2015	May 2	Sep 27	Apr 16	Oct 18
2014	Apr 25	Sep 19	Apr 21	Nov 10
2013	May 15	Oct 14	Apr 22	Oct 25
2012	Apr 30	Oct 13	Apr 30	Oct 13
2011	May 2	Oct 7	Apr 16	Oct 29
2010	May 11	Oct 13	May 11	Oct 19
2009	Apr 30	Oct 11	Apr 20	Oct 14
2008	May 2	Sep 20	May 1	Oct 19
2007	May 14	Oct 26	Apr 11	Oct 29
2006	Apr 30	Oct 8	Apr 30	Oct 14
2005	May 13	Oct 21	May 13	Oct 22
2004	May 8	Oct 5	Apr 25	Oct 6
2003	May 18	Oct 6	Apr 19	Oct 20
2002	no data	Oct 8	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.