Frost history / Hopewell Morgantown, PA
Hopewell Morgantown, PA: frost dates by year
Last spring and first fall frost at NOAA station USC00364076, 1979 to 2002, measured from daily minimum temperatures.
Elevation 550 ft, 40.159, -75.886. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 23 | Oct 11 |
| Earliest | Apr 10 (1984) | Sep 28 (1989) |
| Latest | May 21 (2002) | Nov 3 (1984) |
| Trend | 7.2 days later per decade | 3.7 days earlier per decade |
| Years with data | 20 | 20 |
At 28°F (hard freeze) the median last spring date is Apr 11 and the median first fall date is Nov 1.
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 |
|---|---|---|---|---|
| 2002 | May 21 | no data | Apr 23 | no data |
| 2001 | no data | Oct 9 | no data | Oct 9 |
| 2000 | Apr 25 | Oct 7 | Apr 13 | Nov 5 |
| 1999 | Apr 26 | Oct 27 | Mar 27 | Nov 16 |
| 1997 | May 8 | Oct 2 | Apr 11 | Oct 23 |
| 1996 | May 14 | Oct 4 | Apr 15 | Nov 3 |
| 1995 | Apr 17 | Oct 17 | Apr 6 | Nov 5 |
| 1994 | Apr 23 | Oct 12 | Apr 8 | Nov 12 |
| 1993 | Apr 23 | Oct 1 | Mar 22 | Nov 8 |
| 1992 | no data | Oct 1 | no data | Oct 20 |
| 1991 | Apr 13 | Oct 14 | Apr 4 | Oct 21 |
| 1990 | Apr 19 | Oct 20 | Apr 19 | Oct 30 |
| 1989 | Apr 24 | Sep 28 | Apr 24 | Nov 4 |
| 1988 | Apr 26 | no data | Mar 22 | no data |
| 1987 | Apr 10 | Oct 9 | Apr 2 | Oct 26 |
| 1986 | Apr 23 | Oct 11 | Apr 14 | Nov 3 |
| 1984 | Apr 10 | Nov 3 | Apr 2 | Nov 3 |
| 1983 | May 17 | Oct 22 | Apr 20 | Oct 22 |
| 1982 | Apr 15 | Oct 11 | Apr 10 | Oct 18 |
| 1981 | Apr 22 | Oct 10 | Apr 22 | Oct 20 |
| 1980 | Apr 18 | Oct 23 | Apr 17 | Oct 30 |
| 1979 | Apr 20 | Oct 11 | Apr 11 | Nov 5 |
"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.