Frost history / Matheson 8 Se, CO
Matheson 8 Se, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00055427, 1996 to 2007, measured from daily minimum temperatures.
Elevation 5,830 ft, 39.129, -103.846. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 18 | Oct 4 |
| Earliest | Apr 30 (1996) | Sep 14 (2003) |
| Latest | Jun 8 (2007) | Oct 9 (1997) |
| Trend | 22.0 days later per decade | 2.9 days earlier per decade |
| Years with data | 12 | 11 |
At 28°F (hard freeze) the median last spring date is May 3 and the median first fall date is Oct 7.
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 | Jun 8 | Oct 8 | Apr 15 | Oct 8 |
| 2006 | May 15 | Sep 17 | Apr 26 | Oct 18 |
| 2005 | May 13 | Oct 7 | May 3 | Oct 7 |
| 2004 | May 31 | no data | May 1 | no data |
| 2003 | May 21 | Sep 14 | May 11 | Oct 14 |
| 2002 | May 25 | Oct 4 | May 22 | Oct 13 |
| 2001 | May 21 | Oct 5 | May 21 | Oct 7 |
| 2000 | May 18 | Sep 24 | May 13 | Sep 24 |
| 1999 | May 17 | Sep 29 | May 12 | Sep 29 |
| 1998 | Apr 30 | Oct 5 | Apr 29 | Oct 5 |
| 1997 | May 12 | Oct 9 | May 3 | Oct 13 |
| 1996 | Apr 30 | Sep 26 | Apr 30 | Sep 27 |
"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.