Frost history / Chatham Muni Ap, MA
Chatham Muni Ap, MA: frost dates by year
Last spring and first fall frost at NOAA station USW00094624, 1996 to 2024, measured from daily minimum temperatures.
Elevation 68 ft, 41.688, -69.993. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 11 | Nov 6 |
| Earliest | Mar 26 (2017) | Oct 19 (2001) |
| Latest | May 7 (2001) | Nov 30 (2024) |
| Trend | 5.3 days earlier per decade | 3.8 days later per decade |
| Years with data | 28 | 29 |
At 28°F (hard freeze) the median last spring date is Mar 23 and the median first fall date is Nov 22.
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 |
|---|---|---|---|---|
| 2024 | Apr 26 | Nov 30 | Mar 22 | Dec 2 |
| 2023 | Apr 3 | Nov 2 | Feb 26 | Nov 25 |
| 2022 | Mar 30 | Nov 15 | Mar 29 | Dec 14 |
| 2021 | Apr 4 | Nov 5 | Mar 16 | Dec 23 |
| 2020 | Apr 23 | Oct 31 | Mar 16 | Nov 19 |
| 2019 | Apr 2 | Nov 9 | Apr 2 | Nov 13 |
| 2018 | Apr 11 | Oct 19 | Mar 20 | Nov 22 |
| 2017 | Mar 26 | Nov 10 | Mar 24 | Nov 11 |
| 2016 | Apr 9 | Nov 22 | Apr 6 | Dec 10 |
| 2015 | Apr 12 | Nov 17 | Apr 2 | Nov 25 |
| 2014 | Apr 10 | Nov 15 | Mar 27 | Nov 16 |
| 2013 | Apr 7 | Nov 12 | Mar 18 | Nov 24 |
| 2012 | Apr 6 | Nov 6 | Mar 11 | Dec 6 |
| 2011 | Apr 9 | Oct 31 | Mar 15 | Dec 11 |
| 2010 | Mar 28 | Nov 2 | Mar 28 | Dec 6 |
| 2009 | Apr 17 | Nov 7 | Mar 25 | Dec 11 |
| 2008 | Apr 16 | Oct 23 | Mar 30 | Nov 20 |
| 2007 | Apr 11 | Nov 11 | Mar 18 | Nov 24 |
| 2006 | Apr 9 | Nov 3 | Mar 21 | Dec 5 |
| 2005 | Apr 17 | Nov 12 | Mar 27 | Nov 19 |
| 2004 | Apr 17 | Oct 28 | Mar 23 | Nov 10 |
| 2003 | Apr 18 | Oct 24 | Apr 1 | Nov 9 |
| 2002 | Apr 27 | Oct 25 | Mar 23 | Nov 3 |
| 2001 | May 7 | Oct 19 | Apr 4 | Nov 13 |
| 2000 | Apr 11 | Nov 21 | Mar 18 | Nov 23 |
| 1999 | May 1 | Nov 8 | Mar 21 | Nov 8 |
| 1998 | Apr 12 | Nov 4 | Mar 17 | Nov 19 |
| 1997 | Apr 11 | Oct 23 | Mar 25 | Oct 23 |
| 1996 | no data | Nov 12 | no data | Nov 13 |
"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.