Frost history / Loyalhanna Lake, PA
Loyalhanna Lake, PA: frost dates by year
Last spring and first fall frost at NOAA station USC00365212, 1989 to 2025, measured from daily minimum temperatures.
Elevation 990 ft, 40.459, -79.450. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 1 | Oct 18 |
| Earliest | Apr 18 (2025) | Sep 27 (1991) |
| Latest | May 14 (2021) | Oct 26 (2016) |
| Trend | 0.9 days earlier per decade | 2.7 days later per decade |
| Years with data | 14 | 13 |
At 28°F (hard freeze) the median last spring date is Apr 18 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 18 | Oct 11 | Apr 18 | Oct 27 |
| 2024 | Apr 27 | Oct 19 | Mar 31 | Oct 28 |
| 2023 | Apr 28 | Oct 23 | Apr 11 | Nov 2 |
| 2022 | May 1 | Oct 10 | Apr 30 | Oct 21 |
| 2021 | May 14 | no data | Apr 27 | no data |
| 2020 | May 14 | no data | May 10 | no data |
| 2019 | May 1 | Oct 18 | Apr 3 | Nov 2 |
| 2018 | May 1 | no data | May 1 | no data |
| 2017 | May 10 | Oct 20 | Apr 8 | Nov 9 |
| 2016 | no data | Oct 26 | no data | Nov 12 |
| 2015 | no data | Oct 19 | no data | Oct 19 |
| 1996 | May 14 | no data | Apr 10 | no data |
| 1994 | Apr 24 | Oct 11 | Apr 23 | Oct 28 |
| 1993 | no data | Oct 11 | no data | Oct 11 |
| 1992 | May 8 | no data | May 8 | no data |
| 1991 | Apr 23 | Sep 27 | Apr 18 | Oct 8 |
| 1990 | May 12 | Oct 20 | Apr 19 | Oct 20 |
| 1989 | no data | Oct 8 | no data | Oct 23 |
"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.