Frost history / Lake City, CO
Lake City, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00054734, 1959 to 2009, measured from daily minimum temperatures.
Elevation 8,667 ft, 38.025, -107.315. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 16 | Sep 13 |
| Earliest | May 19 (2000) | Aug 4 (1974) |
| Latest | Jul 27 (1974) | Sep 25 (1981) |
| Trend | 3.8 days earlier per decade | 5.0 days later per decade |
| Years with data | 41 | 44 |
At 28°F (hard freeze) the median last spring date is Jun 8 and the median first fall date is Sep 17.
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 | Sep 18 | no data | Sep 22 |
| 2008 | Jun 14 | Sep 13 | May 27 | Oct 7 |
| 2007 | Jun 8 | Sep 19 | Jun 8 | Sep 25 |
| 2006 | Jun 1 | Sep 17 | May 30 | Sep 17 |
| 2005 | Jun 13 | Sep 15 | Jun 8 | Sep 17 |
| 2004 | Jun 12 | Sep 5 | May 30 | Sep 15 |
| 2003 | Jun 7 | Sep 14 | May 12 | Sep 14 |
| 2002 | Jun 4 | Sep 20 | May 23 | Oct 4 |
| 2001 | Jun 14 | Sep 9 | Jun 14 | Sep 9 |
| 2000 | May 19 | Sep 24 | May 19 | Sep 24 |
| 1999 | Jun 6 | Sep 21 | Jun 6 | Sep 28 |
| 1998 | Jun 18 | Sep 21 | Jun 18 | Sep 22 |
| 1997 | Jun 16 | Sep 23 | May 27 | Oct 4 |
| 1996 | Jun 2 | Sep 18 | May 29 | Sep 19 |
| 1995 | Jun 18 | Sep 21 | Jun 9 | Sep 22 |
| 1994 | Jul 7 | Sep 15 | May 21 | Sep 15 |
| 1993 | Jun 25 | Sep 14 | Jun 7 | Sep 14 |
| 1992 | Jun 17 | Aug 27 | Jun 17 | Sep 26 |
| 1991 | Jun 4 | Sep 14 | May 30 | Sep 16 |
| 1990 | Jun 3 | Sep 18 | Jun 3 | Oct 5 |
| 1989 | Jun 24 | Sep 9 | May 31 | Sep 15 |
| 1988 | no data | Sep 14 | no data | Sep 14 |
| 1981 | Jun 16 | Sep 25 | Jun 16 | Oct 6 |
| 1980 | Jun 16 | Sep 17 | Jun 16 | Sep 23 |
| 1979 | Jun 19 | Aug 19 | Jun 11 | Sep 15 |
| 1978 | no data | Aug 15 | no data | Sep 12 |
| 1977 | Jun 24 | no data | May 30 | no data |
| 1976 | Jun 29 | Aug 12 | Jun 24 | Sep 1 |
| 1975 | Jun 26 | Sep 19 | Jun 26 | Sep 19 |
| 1974 | Jul 27 | Aug 4 | Jul 7 | Sep 21 |
| 1973 | Jul 23 | Sep 3 | Jul 22 | Sep 3 |
| 1972 | Jun 26 | Aug 14 | Jun 24 | Aug 24 |
| 1971 | Jun 13 | Sep 4 | May 24 | Sep 4 |
| 1970 | no data | Sep 3 | no data | Sep 7 |
| 1969 | Jul 7 | Sep 16 | Jun 27 | Sep 18 |
| 1968 | Jul 4 | Aug 15 | Jun 30 | Aug 24 |
| 1967 | Jun 21 | Sep 13 | Jun 16 | Sep 13 |
| 1966 | Jun 13 | Aug 22 | May 27 | Sep 3 |
| 1965 | Jun 29 | Sep 1 | Jun 28 | Sep 1 |
| 1964 | Jun 23 | Aug 21 | Jun 23 | Aug 21 |
| 1963 | Jun 17 | Sep 20 | Jun 10 | Oct 13 |
| 1962 | Jul 25 | Aug 24 | Jun 17 | Aug 24 |
| 1961 | Jun 3 | Sep 3 | Jun 2 | Sep 4 |
| 1960 | Jun 6 | Aug 17 | May 25 | Sep 24 |
| 1959 | Jun 2 | Sep 1 | May 26 | Sep 18 |
"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.