Frost history / Ordway 21 N, CO
Ordway 21 N, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00056136, 1981 to 2015, measured from daily minimum temperatures.
Elevation 4,767 ft, 38.530, -103.706. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 7 | Oct 7 |
| Earliest | Apr 8 (2009) | Sep 20 (1983) |
| Latest | Jun 15 (1981) | Oct 23 (2008) |
| Trend | 1.7 days earlier per decade | 2.2 days later per decade |
| Years with data | 35 | 34 |
At 28°F (hard freeze) the median last spring date is Apr 29 and the median first fall date is Oct 11.
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 |
|---|---|---|---|---|
| 2015 | May 11 | no data | Apr 10 | no data |
| 2014 | May 14 | Oct 4 | Apr 16 | Nov 5 |
| 2013 | May 6 | Oct 5 | May 6 | Oct 5 |
| 2012 | Apr 17 | Oct 7 | Apr 16 | Oct 8 |
| 2011 | May 4 | Oct 10 | May 3 | Oct 18 |
| 2010 | May 14 | Oct 13 | May 13 | Oct 26 |
| 2009 | Apr 8 | Oct 2 | Apr 8 | Oct 2 |
| 2008 | May 14 | Oct 23 | May 11 | Oct 23 |
| 2007 | Apr 26 | Oct 8 | Apr 15 | Oct 19 |
| 2006 | May 11 | Oct 11 | Apr 26 | Oct 19 |
| 2005 | May 12 | Oct 7 | May 3 | Oct 7 |
| 2004 | May 1 | Oct 9 | Apr 13 | Oct 14 |
| 2003 | May 11 | Oct 14 | Apr 10 | Oct 26 |
| 2002 | May 25 | Oct 15 | May 9 | Oct 15 |
| 2001 | May 21 | Oct 6 | Apr 18 | Oct 6 |
| 2000 | May 13 | Sep 24 | May 13 | Sep 25 |
| 1999 | May 12 | Sep 29 | Apr 18 | Sep 29 |
| 1998 | Apr 30 | Oct 5 | Apr 29 | Oct 17 |
| 1997 | May 3 | Oct 9 | May 3 | Oct 9 |
| 1996 | Apr 30 | Sep 26 | Apr 30 | Oct 18 |
| 1995 | May 18 | Sep 21 | May 4 | Sep 22 |
| 1994 | May 3 | Sep 22 | Apr 30 | Sep 22 |
| 1993 | May 2 | Oct 9 | May 2 | Oct 10 |
| 1992 | Apr 26 | Oct 8 | Apr 2 | Oct 8 |
| 1991 | May 2 | Oct 5 | May 1 | Oct 5 |
| 1990 | May 10 | Oct 8 | May 4 | Oct 9 |
| 1989 | May 5 | Oct 17 | Apr 28 | Oct 19 |
| 1988 | May 9 | Oct 8 | Apr 27 | Oct 23 |
| 1987 | Apr 22 | Oct 7 | Apr 8 | Oct 11 |
| 1986 | May 18 | Sep 30 | Apr 15 | Oct 12 |
| 1985 | Apr 27 | Sep 23 | Apr 5 | Sep 26 |
| 1984 | Apr 29 | Sep 28 | Apr 27 | Sep 29 |
| 1983 | May 12 | Sep 20 | May 12 | Sep 21 |
| 1982 | May 7 | Oct 6 | May 7 | Oct 11 |
| 1981 | Jun 15 | Oct 17 | May 13 | Oct 17 |
"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.