Frost history / Jaffrey Silver Rch Airpark, NH

Jaffrey Silver Rch Airpark, NH: frost dates by year

Last spring and first fall frost at NOAA station USC00274304, 2011 to 2025, measured from daily minimum temperatures.

Elevation 1,030 ft, 42.809, -72.005. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 28	Oct 12
Earliest	Apr 16 (2017)	Sep 19 (2019)
Latest	May 18 (2023)	Oct 31 (2023)
Trend	1.5 days earlier per decade	7.8 days later per decade
Years with data	14	15

At 28°F (hard freeze) the median last spring date is Apr 19 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
2025	Apr 21	Oct 10	Apr 18	Oct 27
2024	Apr 27	Oct 17	Apr 27	Nov 3
2023	May 18	Oct 31	Apr 9	Nov 2
2022	May 9	Oct 19	Apr 21	Oct 29
2021	Apr 23	Oct 29	Apr 22	Nov 4
2020	May 13	Sep 20	Apr 23	Sep 20
2019	Apr 18	Sep 19	Apr 11	Nov 4
2018	Apr 24	Oct 17	Apr 23	Oct 19
2017	Apr 16	Oct 13	Apr 16	Nov 1
2016	Apr 28	Sep 26	Apr 17	Oct 15
2015	Apr 25	Oct 5	Apr 6	Oct 18
2014	May 7	Oct 12	Apr 20	Nov 15
2013	May 15	Oct 9	Apr 22	Oct 26
2012	Apr 30	Oct 13	Apr 14	Oct 13
2011	no data	Oct 7	no data	Oct 28

"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.