Norton W, MA: frost dates by year

Last spring and first fall frost at NOAA station USC00195984, 2008 to 2025, measured from daily minimum temperatures.

Elevation 95 ft, 41.993, -71.167. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 26	Oct 18
Earliest	Apr 6 (2019)	Oct 5 (2019)
Latest	May 18 (2023)	Nov 4 (2021)
Trend	little change (less than half a day per decade)	3.3 days later per decade
Years with data	18	18

At 28°F (hard freeze) the median last spring date is Apr 10 and the median first fall date is Nov 1.

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 19	Oct 10	Apr 11	Nov 7
2024	Apr 28	Oct 17	Mar 25	Nov 4
2023	May 18	Nov 2	Apr 11	Nov 2
2022	Apr 30	Oct 20	Apr 18	Nov 15
2021	Apr 22	Nov 4	Apr 5	Nov 6
2020	May 10	Oct 18	Apr 23	Oct 31
2019	Apr 6	Oct 5	Apr 6	Nov 4
2018	Apr 25	Oct 19	Apr 11	Oct 19
2017	Apr 20	Nov 1	Apr 4	Nov 9
2016	Apr 29	Oct 15	Apr 10	Oct 28
2015	Apr 26	Oct 18	Apr 6	Oct 18
2014	Apr 22	Oct 11	Apr 19	Nov 3
2013	Apr 23	Oct 21	Apr 8	Oct 26
2012	May 1	Oct 13	Apr 7	Oct 13
2011	Apr 23	Oct 28	Apr 16	Oct 31
2010	May 12	Oct 23	Mar 29	Nov 2
2009	Apr 21	Oct 12	Apr 10	Oct 20
2008	May 2	Oct 8	Apr 17	Oct 24

"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.