Durham 2 N, NH: frost dates by year

Last spring and first fall frost at NOAA station USW00054794, 2002 to 2024, measured from daily minimum temperatures.

Elevation 119 ft, 43.172, -70.928. Download the data (JSON) · NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 2	Oct 13
Earliest	Apr 18 (2019)	Sep 20 (2014)
Latest	May 20 (2002)	Oct 31 (2023)
Trend	5.6 days earlier per decade	3.2 days later per decade
Years with data	23	22

At 28°F (hard freeze) the median last spring date is Apr 17 and the median first fall date is Oct 28.

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 25	Oct 17
2023	May 18	Oct 31	Apr 10	Nov 2
2022	Apr 23	Oct 9	Apr 18	Oct 29
2021	Apr 22	Oct 29	Apr 4	Nov 4
2020	May 14	Sep 20	Apr 23	Oct 30
2019	Apr 18	no data	Apr 11	no data
2018	Apr 24	Oct 18	Apr 15	Oct 18
2017	May 9	Oct 18	Apr 3	Nov 8
2016	Apr 30	Oct 11	Apr 27	Oct 27
2015	May 2	Oct 18	Apr 8	Oct 18
2014	Apr 21	Sep 20	Apr 21	Nov 10
2013	May 15	Oct 21	Apr 7	Oct 25
2012	Apr 30	Oct 13	Apr 6	Nov 5
2011	Apr 22	Oct 28	Apr 16	Oct 29
2010	May 11	Oct 13	May 11	Oct 19
2009	Apr 30	Oct 12	Apr 20	Oct 14
2008	May 2	Oct 7	May 1	Oct 23
2007	May 7	Oct 17	Apr 11	Oct 29
2006	Apr 30	Oct 8	Apr 10	Oct 27
2005	May 13	Oct 21	Apr 22	Nov 9
2004	May 5	Oct 5	Apr 17	Nov 4
2003	May 18	Oct 6	Apr 18	Oct 20
2002	May 20	Oct 9	Apr 25	Oct 15

"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.