Frost history / Bedford Hanscom Fld, MA
Bedford Hanscom Fld, MA: frost dates by year
Last spring and first fall frost at NOAA station USW00014702, 1951 to 2024, measured from daily minimum temperatures.
Elevation 133 ft, 42.470, -71.289. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 3 | Oct 8 |
| Earliest | Apr 10 (1954) | Sep 15 (1963) |
| Latest | May 28 (1968) | Oct 31 (2023) |
| Trend | little change (less than half a day per decade) | 0.8 days later per decade |
| Years with data | 46 | 47 |
At 28°F (hard freeze) the median last spring date is Apr 14 and the median first fall date is Oct 23.
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 27 | Oct 12 | Apr 26 | Oct 17 |
| 2023 | May 18 | Oct 31 | Apr 9 | Nov 2 |
| 2022 | Apr 21 | Oct 19 | Mar 30 | Nov 9 |
| 2021 | Apr 22 | Oct 28 | Apr 4 | Nov 4 |
| 2020 | May 14 | Sep 20 | Apr 12 | Oct 30 |
| 2019 | Apr 17 | Oct 5 | Apr 5 | Nov 8 |
| 2018 | Apr 23 | Oct 18 | Apr 12 | Oct 21 |
| 2017 | May 9 | Oct 13 | Apr 3 | Nov 8 |
| 2016 | Apr 28 | Sep 26 | Apr 15 | Oct 27 |
| 2015 | May 2 | Sep 27 | Apr 12 | Oct 18 |
| 2014 | Apr 21 | Sep 20 | Apr 20 | Nov 10 |
| 2013 | May 15 | Oct 14 | Apr 22 | Oct 25 |
| 2012 | Apr 30 | Oct 12 | Apr 30 | Oct 13 |
| 2011 | Apr 22 | Oct 28 | Apr 22 | Oct 30 |
| 2010 | May 11 | Oct 13 | Mar 28 | Nov 1 |
| 2009 | Apr 20 | Oct 11 | Apr 16 | Oct 15 |
| 2008 | May 11 | Oct 8 | May 1 | Oct 23 |
| 2007 | May 7 | Oct 17 | Apr 20 | Oct 29 |
| 2006 | Apr 30 | Oct 8 | Apr 30 | Oct 27 |
| 2005 | May 13 | Oct 21 | Apr 22 | Nov 9 |
| 2004 | May 5 | Oct 6 | Apr 9 | Oct 6 |
| 2003 | May 18 | Oct 6 | Apr 25 | Oct 7 |
| 2002 | May 21 | Oct 9 | Apr 27 | Oct 14 |
| 2001 | May 7 | Oct 8 | May 7 | Oct 9 |
| 2000 | May 3 | Sep 29 | Apr 14 | Sep 29 |
| 1999 | May 14 | Oct 7 | Apr 11 | Oct 7 |
| 1998 | no data | Oct 5 | no data | Oct 27 |
| 1970 | Apr 20 | Oct 19 | Apr 6 | Oct 20 |
| 1969 | May 27 | Oct 15 | Apr 21 | Oct 23 |
| 1968 | May 28 | Oct 6 | Apr 12 | Oct 27 |
| 1967 | May 7 | Oct 8 | Apr 26 | Oct 23 |
| 1966 | May 3 | Sep 27 | Apr 19 | Oct 26 |
| 1965 | Apr 25 | Sep 28 | Apr 9 | Oct 6 |
| 1964 | May 3 | Sep 16 | May 2 | Oct 8 |
| 1963 | May 12 | Sep 15 | Apr 14 | Oct 10 |
| 1962 | May 13 | Sep 21 | Apr 25 | Oct 25 |
| 1961 | May 6 | Oct 16 | Mar 27 | Oct 28 |
| 1960 | Apr 20 | Oct 13 | Apr 20 | Oct 21 |
| 1959 | Apr 24 | Oct 19 | Apr 14 | Oct 21 |
| 1958 | May 3 | Oct 6 | Apr 10 | Oct 14 |
| 1957 | Apr 16 | Oct 27 | Apr 16 | Nov 10 |
| 1956 | May 25 | Oct 6 | Apr 13 | Oct 11 |
| 1955 | Apr 17 | Oct 22 | Apr 9 | Oct 23 |
| 1954 | Apr 10 | Oct 7 | Apr 5 | Oct 8 |
| 1953 | Apr 16 | Sep 24 | Mar 12 | Oct 14 |
| 1952 | Apr 17 | Oct 9 | Apr 12 | Oct 21 |
| 1951 | May 14 | Sep 29 | Apr 21 | Oct 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.