Frost history / Whitefield Mt Washington Ap, NH
Whitefield Mt Washington Ap, NH: frost dates by year
Last spring and first fall frost at NOAA station USW00054728, 1996 to 2024, measured from daily minimum temperatures.
Elevation 1,074 ft, 44.367, -71.545. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 3 | Sep 17 |
| Earliest | May 17 (2010) | Aug 20 (2007) |
| Latest | Jul 28 (2001) | Oct 6 (2024) |
| Trend | 4.0 days earlier per decade | 3.2 days later per decade |
| Years with data | 28 | 29 |
At 28°F (hard freeze) the median last spring date is May 14 and the median first fall date is Oct 4.
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 | Jun 16 | Oct 6 | Apr 27 | Oct 12 |
| 2023 | May 27 | Sep 27 | May 26 | Oct 31 |
| 2022 | Jun 20 | Sep 17 | May 9 | Oct 3 |
| 2021 | May 28 | Sep 29 | May 7 | Oct 28 |
| 2020 | Jun 14 | Sep 12 | May 14 | Sep 15 |
| 2019 | May 28 | Sep 18 | May 9 | Sep 19 |
| 2018 | Jun 10 | Sep 9 | May 12 | Oct 15 |
| 2017 | May 21 | Sep 2 | May 4 | Oct 1 |
| 2016 | May 17 | Sep 25 | May 10 | Oct 11 |
| 2015 | Jun 7 | Sep 26 | May 14 | Oct 5 |
| 2014 | May 29 | Sep 15 | May 8 | Sep 19 |
| 2013 | May 28 | Sep 9 | May 15 | Oct 26 |
| 2012 | May 18 | Sep 17 | Apr 30 | Oct 9 |
| 2011 | Jun 4 | Sep 16 | May 1 | Oct 6 |
| 2010 | May 17 | Sep 20 | May 13 | Oct 13 |
| 2009 | Jun 1 | Sep 19 | May 26 | Sep 20 |
| 2008 | May 30 | Sep 18 | May 2 | Sep 23 |
| 2007 | Jun 7 | Aug 20 | May 14 | Oct 16 |
| 2006 | May 25 | Sep 11 | May 8 | Oct 6 |
| 2005 | May 21 | Sep 11 | May 20 | Sep 25 |
| 2004 | Jun 13 | Sep 20 | May 31 | Oct 4 |
| 2003 | Jun 4 | Sep 9 | May 18 | Oct 6 |
| 2002 | Jun 4 | Sep 6 | Jun 4 | Oct 8 |
| 2001 | Jul 28 | Sep 3 | Jun 1 | Sep 14 |
| 2000 | Jun 8 | Sep 5 | May 20 | Sep 5 |
| 1999 | Jun 16 | Sep 18 | May 14 | Sep 19 |
| 1998 | Jun 2 | Sep 23 | May 27 | Sep 24 |
| 1997 | Jun 15 | Sep 22 | May 28 | Sep 22 |
| 1996 | no data | Sep 23 | no data | Sep 24 |
"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.