Frost history / Tioga Hammond Dam, PA
Tioga Hammond Dam, PA: frost dates by year
Last spring and first fall frost at NOAA station USC00368868, 1984 to 2025, measured from daily minimum temperatures.
Elevation 1,230 ft, 41.898, -77.142. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 10 | Oct 12 |
| Earliest | Apr 19 (2025) | Sep 19 (2020) |
| Latest | May 26 (1992) | Nov 4 (2021) |
| Trend | 1.4 days earlier per decade | 3.0 days later per decade |
| Years with data | 26 | 25 |
At 28°F (hard freeze) the median last spring date is Apr 24 and the median first fall date is Oct 27.
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 |
|---|---|---|---|---|
| 2025 | Apr 19 | Oct 10 | Apr 17 | Oct 27 |
| 2024 | Apr 27 | Oct 17 | Apr 27 | Nov 3 |
| 2023 | May 19 | Oct 31 | Apr 11 | Nov 1 |
| 2022 | May 9 | Oct 20 | May 1 | Oct 28 |
| 2021 | May 14 | Nov 4 | Apr 24 | Nov 5 |
| 2020 | May 14 | Sep 19 | May 14 | Nov 3 |
| 2019 | Apr 30 | Sep 28 | Apr 30 | Nov 4 |
| 2018 | May 1 | Oct 16 | Apr 24 | Nov 11 |
| 2017 | May 9 | Oct 17 | Apr 25 | Nov 8 |
| 2016 | May 11 | Sep 26 | Apr 29 | Oct 26 |
| 2015 | May 24 | Oct 18 | Apr 27 | Oct 18 |
| 2014 | Apr 29 | Oct 12 | Apr 29 | Nov 8 |
| 2013 | May 15 | Oct 24 | May 14 | Nov 4 |
| 2012 | May 1 | Oct 13 | Apr 30 | Oct 13 |
| 2011 | Apr 23 | Oct 28 | Apr 23 | Oct 28 |
| 2010 | May 12 | Oct 10 | Apr 14 | Nov 2 |
| 2009 | May 20 | Oct 12 | Apr 17 | Oct 19 |
| 2008 | no data | Oct 5 | no data | Oct 19 |
| 1993 | Apr 29 | no data | Apr 28 | no data |
| 1992 | May 26 | Sep 24 | Apr 16 | Oct 20 |
| 1991 | May 4 | no data | Apr 4 | no data |
| 1990 | May 12 | Oct 20 | Apr 20 | Oct 27 |
| 1989 | May 13 | Sep 24 | Apr 25 | Oct 23 |
| 1988 | May 12 | Oct 7 | Apr 26 | Oct 14 |
| 1987 | May 8 | Oct 4 | Apr 2 | Oct 14 |
| 1986 | May 4 | Oct 10 | Apr 24 | Oct 19 |
| 1984 | May 17 | Oct 6 | Apr 22 | Oct 6 |
"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.