Sebec Lake, ME: frost dates by year

Last spring and first fall frost at NOAA station USC00177654, 1993 to 2009, measured from daily minimum temperatures.

Elevation 380 ft, 45.254, -69.228. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 27	Sep 28
Earliest	May 9 (2006)	Sep 11 (1995)
Latest	Jun 10 (1994)	Oct 21 (2005)
Trend	4.9 days earlier per decade	10.1 days later per decade
Years with data	16	16

At 28°F (hard freeze) the median last spring date is May 14 and the median first fall date is Oct 6.

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
2009	May 27	no data	May 19	no data
2008	May 30	Sep 19	May 12	Sep 19
2007	May 23	Sep 17	May 14	Oct 26
2006	May 9	Oct 6	May 8	Oct 28
2005	May 15	Oct 21	May 14	Oct 22
2004	Jun 5	Oct 6	May 10	Oct 6
2003	Jun 4	Oct 4	May 17	Oct 20
2002	Jun 4	Sep 29	May 20	Oct 9
2001	May 18	Sep 30	May 7	Oct 9
2000	May 21	Sep 29	May 20	Sep 29
1999	May 17	Oct 5	May 13	Oct 5
1998	May 27	Sep 24	Apr 29	Oct 6
1997	Jun 6	Sep 22	May 24	Sep 22
1996	May 28	Sep 27	May 27	Oct 5
1995	May 21	Sep 11	May 10	Sep 24
1994	Jun 10	Sep 20	May 28	Oct 7
1993	no data	Sep 12	no data	Oct 1

"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.