Topsfield 2, ME: frost dates by year

Last spring and first fall frost at NOAA station USC00178792, 2005 to 2025, measured from daily minimum temperatures.

Elevation 620 ft, 45.435, -67.721. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 9	Oct 14
Earliest	Apr 21 (2009)	Sep 19 (2014)
Latest	May 23 (2007)	Nov 4 (2021)
Trend	1.0 days later per decade	1.1 days earlier per decade
Years with data	21	21

At 28°F (hard freeze) the median last spring date is Apr 25 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
2025	May 2	Oct 10	May 1	Nov 3
2024	May 10	Oct 17	Apr 26	Oct 28
2023	May 18	Oct 30	Apr 21	Oct 31
2022	May 8	Oct 9	Apr 25	Nov 9
2021	Apr 27	Nov 4	Apr 23	Nov 4
2020	May 14	Oct 9	May 11	Oct 26
2019	May 9	Oct 3	May 1	Nov 2
2018	May 13	Sep 24	Apr 17	Oct 19
2017	Apr 25	Oct 17	Apr 19	Nov 8
2016	May 9	Oct 15	Apr 30	Nov 5
2015	May 9	Oct 4	Apr 16	Oct 18
2014	May 13	Sep 19	Apr 30	Nov 3
2013	May 4	Oct 23	Apr 27	Oct 26
2012	May 1	Oct 13	Apr 30	Oct 13
2011	Apr 24	Oct 6	Apr 23	Oct 27
2010	May 13	Oct 19	Apr 17	Nov 2
2009	Apr 21	Oct 11	Apr 20	Oct 15
2008	May 3	Oct 18	May 2	Oct 19
2007	May 23	Oct 26	Apr 25	Oct 29
2006	Apr 30	Oct 14	Apr 29	Oct 28
2005	May 14	Oct 22	Apr 22	Oct 29

"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.