Mt Carmel, CT: frost dates by year

Last spring and first fall frost at NOAA station USC00065077, 1951 to 2021, measured from daily minimum temperatures.

Elevation 180 ft, 41.408, -72.903. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 25	Oct 12
Earliest	Apr 9 (2017)	Sep 18 (1959)
Latest	May 31 (1961)	Nov 9 (2017)
Trend	1.5 days earlier per decade	2.7 days later per decade
Years with data	61	65

At 28°F (hard freeze) the median last spring date is Apr 11 and the median first fall date is Oct 25.

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
2021	Apr 22	Nov 3	Apr 4	Nov 6
2020	May 10	Oct 31	May 10	Oct 31
2019	Apr 11	Oct 19	Apr 2	Nov 4
2018	Apr 18	Oct 19	Apr 11	Oct 19
2017	Apr 9	Nov 9	Mar 24	Nov 10
2016	Apr 15	Oct 25	Apr 9	Nov 8
2015	Apr 25	Oct 18	Apr 5	Oct 19
2013	no data	Oct 24	no data	Oct 25
2012	Apr 30	no data	Apr 3	no data
2011	Apr 10	Oct 28	Mar 30	Oct 31
2010	Apr 28	Oct 23	Mar 28	Nov 20
2009	Apr 17	Oct 20	Apr 13	Nov 7
2008	no data	Oct 20	no data	Oct 24
2007	May 8	Oct 30	Apr 11	Nov 8
2006	Apr 11	Oct 14	Apr 6	Oct 27
2005	Apr 17	Oct 27	Mar 25	Nov 12
2004	Apr 10	no data	Apr 6	no data
2003	Apr 25	Oct 3	Apr 10	Oct 25
2002	May 1	Oct 15	Apr 27	Oct 24
2001	May 8	no data	May 7	no data
2000	May 16	Sep 29	Apr 14	Oct 8
1999	Apr 20	Oct 6	Apr 11	Oct 8
1997	no data	Oct 2	no data	Oct 23
1996	no data	Oct 4	no data	Oct 4
1995	Apr 17	Oct 17	Apr 17	Nov 5
1993	no data	Oct 6	no data	Oct 11
1992	no data	Oct 18	no data	Oct 28
1991	Apr 19	Oct 21	Mar 31	Oct 21
1990	Apr 19	Oct 20	Apr 19	Oct 28
1989	Apr 23	Sep 28	Apr 23	Oct 10
1988	Apr 23	Oct 9	Apr 13	Oct 14
1987	May 14	Oct 5	Apr 2	Nov 7
1986	May 4	Oct 11	Apr 14	Nov 3
1985	May 9	Oct 22	Apr 10	Nov 16
1984	Apr 22	Oct 7	Apr 22	Oct 7
1983	Apr 14	Oct 21	Mar 30	Oct 30
1982	Apr 23	Oct 11	Apr 23	Oct 18
1981	May 9	Oct 14	Apr 22	Nov 13
1980	Apr 19	Oct 10	Apr 18	Oct 10
1979	Apr 20	Sep 20	Apr 11	Oct 28
1978	May 1	Oct 9	Apr 3	Oct 16
1977	Apr 30	Oct 18	Apr 10	Nov 14
1976	May 13	Oct 11	Apr 12	Oct 19
1975	Apr 23	Oct 3	Apr 23	Nov 1
1974	May 8	Sep 24	May 8	Oct 19
1973	Apr 15	Oct 19	Apr 15	Nov 6
1972	Apr 28	Oct 10	Apr 28	Oct 20
1971	Apr 25	Nov 5	Apr 17	Nov 7
1970	May 7	Oct 18	Apr 11	Oct 18
1969	May 6	Oct 19	Apr 13	Oct 23
1968	May 8	Oct 6	Apr 12	Nov 1
1967	May 7	Oct 20	Apr 13	Oct 30
1966	May 11	Oct 7	May 11	Oct 21
1965	Apr 25	Sep 28	Apr 5	Oct 6
1964	May 4	Oct 6	Apr 10	Oct 12
1963	no data	Sep 24	no data	Nov 4
1962	Apr 25	Oct 25	Apr 15	Oct 25
1961	May 31	Oct 5	Apr 7	Oct 16
1960	May 3	Oct 8	Apr 11	Oct 21
1959	Apr 24	Sep 18	Apr 14	Oct 20
1958	May 10	Oct 6	Apr 10	Oct 6
1957	May 3	Sep 27	Apr 16	Nov 7
1956	May 9	Sep 21	Apr 20	Oct 11
1955	Apr 16	Oct 23	Apr 9	Oct 23
1954	Apr 13	Oct 8	Apr 10	Oct 8
1953	Apr 29	Oct 9	Mar 18	Nov 14
1952	Apr 12	Oct 12	Apr 12	Oct 20
1951	Apr 24	Oct 13	Mar 27	Nov 3

"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.