Frost history / Willsboro 1 N, NY
Willsboro 1 N, NY: frost dates by year
Last spring and first fall frost at NOAA station USC00309495, 1993 to 2009, measured from daily minimum temperatures.
Elevation 180 ft, 44.384, -73.382. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 7 | Oct 9 |
| Earliest | Apr 27 (1998) | Sep 30 (1993) |
| Latest | May 20 (2000) | Oct 21 (2005) |
| Trend | 1.6 days earlier per decade | 7.4 days later per decade |
| Years with data | 11 | 11 |
At 28°F (hard freeze) the median last spring date is Apr 25 and the median first fall date is Oct 14.
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 |
|---|---|---|---|---|
| 2009 | no data | Oct 14 | no data | Oct 14 |
| 2007 | May 7 | no data | Apr 12 | no data |
| 2006 | no data | Oct 13 | no data | Oct 22 |
| 2005 | May 5 | Oct 21 | Apr 22 | Oct 30 |
| 2004 | May 8 | no data | Apr 12 | no data |
| 2003 | May 4 | Oct 3 | Apr 25 | Oct 20 |
| 2002 | no data | Oct 15 | no data | Oct 15 |
| 2001 | May 6 | Oct 9 | Apr 29 | Oct 9 |
| 2000 | May 20 | no data | Apr 14 | no data |
| 1999 | May 14 | Oct 6 | Apr 16 | Oct 8 |
| 1998 | Apr 27 | Oct 6 | Apr 26 | Nov 18 |
| 1997 | May 9 | no data | May 5 | no data |
| 1996 | Apr 29 | Oct 5 | Apr 28 | Oct 5 |
| 1994 | no data | Oct 12 | no data | Oct 12 |
| 1993 | May 14 | Sep 30 | Apr 28 | Oct 1 |
"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 1991–2020 frost probabilities.