Frost history / Danforth, ME
Danforth, ME: frost dates by year
Last spring and first fall frost at NOAA station USC00171833, 1989 to 2007, measured from daily minimum temperatures.
Elevation 475 ft, 45.661, -67.861. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 3 | Sep 15 |
| Earliest | May 14 (2007) | Aug 25 (1989) |
| Latest | Jun 16 (1992) | Oct 15 (2007) |
| Trend | 8.7 days earlier per decade | 11.2 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 Sep 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 |
|---|---|---|---|---|
| 2007 | May 14 | Oct 15 | Apr 26 | Oct 31 |
| 2006 | no data | Sep 27 | no data | Oct 7 |
| 2003 | Jun 4 | no data | May 17 | no data |
| 2002 | Jun 8 | Sep 13 | May 20 | Sep 29 |
| 2001 | May 25 | Sep 6 | May 7 | Sep 30 |
| 2000 | Jun 13 | Sep 6 | May 3 | Sep 6 |
| 1999 | May 17 | Sep 18 | May 14 | Sep 18 |
| 1998 | Jun 2 | Sep 18 | Apr 30 | Sep 24 |
| 1997 | May 28 | Sep 22 | May 24 | Sep 22 |
| 1996 | May 28 | Sep 27 | May 27 | Sep 27 |
| 1995 | May 28 | Sep 9 | May 10 | Sep 11 |
| 1994 | Jun 11 | Sep 16 | May 28 | Oct 2 |
| 1993 | Jun 6 | Sep 12 | May 15 | Sep 20 |
| 1992 | Jun 16 | Sep 13 | May 26 | Sep 24 |
| 1991 | May 23 | Sep 2 | May 19 | Sep 22 |
| 1990 | Jun 7 | Oct 2 | May 4 | Oct 21 |
| 1989 | Jun 13 | Aug 25 | Apr 30 | Sep 25 |
"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.