Woonsocket, RI: frost dates by year

Last spring and first fall frost at NOAA station USC00379423, 2004 to 2020, measured from daily minimum temperatures.

Elevation 110 ft, 41.984, -71.491. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 24	Oct 20
Earliest	Apr 3 (2017)	Oct 6 (2004)
Latest	May 13 (2005)	Nov 9 (2017)
Trend	15.1 days earlier per decade	4.9 days later per decade
Years with data	16	17

At 28°F (hard freeze) the median last spring date is Apr 10 and the median first fall date is Oct 30.

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
2020	Apr 25	Oct 18	Apr 12	Oct 30
2019	Apr 11	Nov 2	Apr 5	Nov 9
2018	Apr 23	Oct 19	Apr 11	Oct 22
2017	Apr 3	Nov 9	Mar 30	Nov 9
2016	Apr 17	Oct 15	Apr 15	Oct 27
2015	Apr 25	Oct 18	Apr 2	Oct 19
2014	Apr 21	Oct 20	Apr 18	Nov 15
2013	Apr 22	Oct 26	Apr 7	Oct 26
2012	Apr 30	Oct 13	Apr 6	Oct 13
2011	Apr 23	Oct 28	Apr 8	Oct 31
2010	May 11	Oct 23	Mar 28	Nov 1
2009	Apr 20	Oct 12	Apr 16	Nov 7
2008	May 1	Oct 20	May 1	Oct 24
2007	May 7	Oct 29	Apr 11	Oct 29
2006	Apr 29	Oct 16	Apr 10	Oct 27
2005	May 13	Oct 27	Apr 16	Nov 11
2004	no data	Oct 6	no data	Nov 4

"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.