Tiverton, RI: frost dates by year

Last spring and first fall frost at NOAA station USC00377581, 1998 to 2018, measured from daily minimum temperatures.

Elevation 90 ft, 41.627, -71.209. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 16	Nov 1
Earliest	Mar 20 (2000)	Oct 13 (2012)
Latest	Apr 25 (2015)	Nov 19 (2000)
Trend	4.1 days later per decade	5.4 days earlier per decade
Years with data	20	21

At 28°F (hard freeze) the median last spring date is Apr 1 and the median first fall date is Nov 11.

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
2018	Apr 22	Oct 22	Apr 11	Nov 14
2017	Mar 30	Nov 9	Mar 24	Nov 10
2016	Apr 10	Oct 27	Apr 6	Dec 9
2015	Apr 25	Oct 19	Apr 2	Nov 24
2014	Apr 21	Nov 10	Apr 18	Nov 15
2013	Apr 22	Nov 4	Apr 7	Nov 4
2012	Apr 7	Oct 13	Apr 1	Nov 6
2011	Apr 16	Oct 28	Apr 16	Nov 6
2010	Mar 28	Nov 1	Mar 28	Nov 3
2009	Apr 17	Oct 20	Mar 26	Nov 7
2008	Apr 17	Oct 23	Apr 3	Nov 2
2007	Apr 20	Nov 8	Apr 8	Nov 11
2006	Apr 10	Nov 4	Mar 21	Dec 5
2005	Apr 17	Nov 12	Mar 27	Nov 19
2004	Apr 6	Nov 4	Mar 23	Nov 9
2003	Apr 18	Oct 20	Apr 1	Nov 9
2002	Apr 7	Oct 31	Apr 7	Nov 3
2001	Apr 19	Oct 29	Mar 27	Nov 13
2000	Mar 20	Nov 19	Mar 19	Nov 23
1999	Apr 11	Nov 8	Mar 21	Nov 12
1998	no data	Nov 6	no data	Dec 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.