Salisbury, NH: frost dates by year

Last spring and first fall frost at NOAA station USC00277833, 1997 to 2025, measured from daily minimum temperatures.

Elevation 550 ft, 43.354, -71.736. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 13	Oct 3
Earliest	Apr 18 (2025)	Sep 19 (2019)
Latest	May 27 (1997)	Oct 24 (2023)
Trend	5.9 days earlier per decade	2.9 days later per decade
Years with data	20	18

At 28°F (hard freeze) the median last spring date is Apr 26 and the median first fall date is Oct 9.

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 18	Sep 21	Apr 18	Oct 10
2024	Apr 27	Oct 17	Apr 27	Oct 27
2023	May 18	Oct 24	May 18	Oct 31
2022	Apr 23	Sep 30	Apr 21	Oct 21
2021	May 7	Oct 24	Apr 23	Oct 29
2020	May 13	Sep 20	May 6	Sep 21
2019	May 9	Sep 19	Apr 18	Oct 6
2018	May 13	Oct 14	Apr 22	Oct 19
2017	May 9	Oct 13	Apr 15	Nov 2
2007	May 14	no data	Apr 20	no data
2006	May 8	Sep 30	Apr 29	Oct 7
2005	May 13	no data	May 5	no data
2004	May 8	Oct 4	May 5	Oct 6
2003	May 19	Oct 3	Apr 25	Oct 7
2002	May 20	Oct 9	May 19	Oct 9
2001	May 8	Oct 9	May 7	Oct 9
2000	May 20	Sep 27	May 3	Sep 29
1999	May 14	Oct 6	Apr 25	Oct 8
1998	May 14	Sep 24	Apr 26	Oct 7
1997	May 27	Sep 22	May 5	Oct 12

"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.