Frost history / Coatesville 2 W, PA
Coatesville 2 W, PA: frost dates by year
Last spring and first fall frost at NOAA station USC00361591, 1983 to 2007, measured from daily minimum temperatures.
Elevation 640 ft, 39.985, -75.860. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 24 | Oct 13 |
| Earliest | Apr 10 (2006) | Oct 1 (1993) |
| Latest | May 14 (1996) | Nov 8 (2004) |
| Trend | little change (less than half a day per decade) | 0.7 days later per decade |
| Years with data | 24 | 23 |
At 28°F (hard freeze) the median last spring date is Apr 8 and the median first fall date is Nov 3.
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 |
|---|---|---|---|---|
| 2007 | Apr 16 | Oct 29 | Apr 11 | Nov 8 |
| 2006 | Apr 10 | Oct 13 | Mar 22 | Nov 4 |
| 2005 | May 3 | no data | Mar 22 | no data |
| 2004 | Apr 16 | Nov 8 | Apr 6 | Nov 9 |
| 2003 | Apr 14 | Oct 23 | Apr 1 | Oct 24 |
| 2002 | May 4 | no data | Apr 7 | no data |
| 2001 | Apr 26 | Oct 8 | Apr 19 | Oct 9 |
| 2000 | Apr 26 | Oct 8 | Apr 13 | Nov 16 |
| 1999 | Apr 25 | Oct 8 | Mar 27 | Nov 17 |
| 1998 | Apr 13 | Oct 23 | Mar 25 | Nov 4 |
| 1997 | May 8 | Oct 2 | Apr 11 | Oct 23 |
| 1996 | May 14 | Oct 5 | Apr 3 | Nov 4 |
| 1995 | Apr 17 | Oct 30 | Apr 6 | Nov 5 |
| 1994 | Apr 23 | Oct 6 | Apr 8 | Nov 12 |
| 1993 | Apr 28 | Oct 1 | Apr 8 | Nov 7 |
| 1992 | Apr 29 | Oct 18 | Apr 13 | Oct 20 |
| 1991 | Apr 13 | Oct 14 | Apr 3 | Oct 21 |
| 1990 | Apr 19 | Oct 21 | Apr 19 | Oct 30 |
| 1989 | Apr 24 | Oct 10 | Apr 24 | Nov 4 |
| 1988 | Apr 26 | Oct 8 | Apr 22 | Oct 9 |
| 1987 | Apr 27 | Oct 9 | Apr 2 | Oct 26 |
| 1986 | May 4 | Oct 10 | Apr 14 | Nov 3 |
| 1985 | Apr 12 | Oct 29 | Apr 10 | Oct 29 |
| 1984 | Apr 11 | Nov 3 | Apr 2 | Nov 3 |
| 1983 | no data | Oct 21 | no data | Oct 22 |
"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.