Frost history / New Haven Tweed Ap, CT
New Haven Tweed Ap, CT: frost dates by year
Last spring and first fall frost at NOAA station USW00014758, 1951 to 2024, measured from daily minimum temperatures.
Elevation 3 ft, 41.264, -72.887. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 12 | Oct 28 |
| Earliest | Mar 23 (1953) | Oct 6 (1958) |
| Latest | May 9 (1956) | Nov 15 (2014) |
| Trend | 0.7 days earlier per decade | 1.2 days later per decade |
| Years with data | 46 | 46 |
At 28°F (hard freeze) the median last spring date is Mar 31 and the median first fall date is Nov 8.
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 | Mar 25 | Nov 10 | Mar 1 | Dec 2 |
| 2023 | Apr 3 | Nov 2 | Apr 3 | Nov 13 |
| 2022 | Apr 5 | Nov 14 | Mar 29 | Nov 15 |
| 2021 | Apr 4 | Nov 6 | Mar 30 | Nov 20 |
| 2020 | Apr 25 | Oct 30 | Apr 23 | Nov 18 |
| 2019 | Apr 2 | Nov 4 | Apr 2 | Nov 9 |
| 2018 | Apr 12 | Oct 19 | Apr 11 | Nov 12 |
| 2017 | Apr 9 | Nov 9 | Mar 24 | Nov 10 |
| 2016 | Apr 13 | Nov 1 | Apr 9 | Nov 14 |
| 2015 | Apr 13 | Oct 18 | Apr 5 | Oct 19 |
| 2014 | Apr 21 | Nov 15 | Mar 27 | Nov 15 |
| 2013 | Apr 7 | Oct 25 | Mar 18 | Nov 4 |
| 2012 | Apr 3 | Oct 13 | Mar 6 | Nov 6 |
| 2011 | Apr 9 | Oct 30 | Mar 27 | Dec 2 |
| 2010 | Mar 27 | Nov 2 | Mar 27 | Nov 20 |
| 2009 | Apr 9 | Oct 19 | Mar 24 | Nov 7 |
| 2008 | May 1 | Oct 20 | Apr 3 | Nov 19 |
| 2007 | Apr 21 | Oct 29 | Apr 11 | Nov 8 |
| 2006 | Apr 11 | Oct 15 | Mar 29 | Oct 27 |
| 2005 | Apr 17 | Oct 28 | Mar 26 | Nov 11 |
| 2004 | Apr 10 | Nov 4 | Apr 10 | Nov 4 |
| 2003 | Apr 25 | Oct 19 | Mar 16 | Oct 25 |
| 2002 | Apr 27 | Oct 15 | Apr 27 | Oct 24 |
| 1976 | Apr 13 | Oct 19 | Apr 13 | Oct 19 |
| 1975 | Apr 23 | Oct 31 | Apr 22 | Nov 23 |
| 1973 | no data | Nov 8 | no data | Nov 8 |
| 1971 | Apr 17 | no data | Mar 26 | no data |
| 1970 | Apr 11 | Oct 28 | Apr 6 | Nov 24 |
| 1969 | Apr 13 | Oct 23 | Apr 7 | Oct 24 |
| 1968 | Apr 12 | Nov 1 | Mar 26 | Nov 28 |
| 1967 | May 7 | Oct 30 | Apr 13 | Nov 6 |
| 1966 | Apr 18 | Oct 30 | Apr 1 | Oct 30 |
| 1965 | Apr 15 | Oct 6 | Apr 5 | Nov 3 |
| 1964 | Apr 10 | Oct 11 | Apr 6 | Oct 12 |
| 1963 | Apr 26 | Nov 13 | Mar 24 | Nov 25 |
| 1962 | Apr 20 | Oct 27 | Apr 18 | Oct 30 |
| 1961 | Apr 21 | Oct 28 | Mar 22 | Nov 11 |
| 1960 | Apr 20 | Oct 21 | Mar 27 | Nov 7 |
| 1959 | Apr 14 | Oct 20 | Mar 29 | Oct 29 |
| 1958 | Apr 10 | Oct 6 | Apr 5 | Nov 8 |
| 1957 | Apr 16 | Oct 27 | Apr 16 | Nov 11 |
| 1956 | May 9 | Nov 10 | Apr 13 | Nov 10 |
| 1955 | Mar 29 | Oct 23 | Mar 29 | Nov 19 |
| 1954 | Apr 10 | Oct 8 | Apr 4 | Nov 8 |
| 1953 | Mar 23 | Oct 9 | Mar 12 | Nov 27 |
| 1952 | Apr 12 | Oct 20 | Mar 16 | Oct 26 |
| 1951 | Mar 27 | Nov 3 | Mar 27 | Nov 4 |
"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.