Durango, CO: frost dates by year

Last spring and first fall frost at NOAA station USC00052441, 1991 to 2015, measured from daily minimum temperatures.

Elevation 6,761 ft, 37.291, -107.856. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 14	Oct 3
Earliest	Apr 26 (2009)	Sep 17 (2006)
Latest	Jun 18 (1995)	Oct 18 (1993)
Trend	1.1 days earlier per decade	0.7 days earlier per decade
Years with data	22	22

At 28°F (hard freeze) the median last spring date is Apr 30 and the median first fall date is Oct 9.

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 12	no data	Apr 26	no data
2014	May 16	Oct 1	Apr 29	Oct 26
2013	May 6	Oct 4	May 6	Oct 7
2010	May 18	Oct 10	May 11	Oct 25
2009	Apr 26	Sep 21	Apr 26	Sep 21
2008	May 27	Oct 6	May 27	Oct 12
2007	Jun 7	Sep 30	Apr 26	Sep 30
2006	May 10	Sep 17	Apr 29	Sep 23
2005	Jun 4	Oct 12	Apr 21	Oct 31
2004	May 24	Sep 22	Apr 21	Oct 14
2003	May 11	Oct 15	May 10	Oct 26
2002	May 22	Oct 1	May 22	Oct 4
2001	Jun 14	Oct 10	Apr 25	Oct 11
2000	May 5	Sep 23	Apr 5	Sep 23
1999	Jun 5	Sep 29	Jun 5	Sep 29
1998	Jun 6	Oct 5	May 15	Oct 5
1997	May 3	Oct 12	May 3	Oct 13
1996	Apr 30	Sep 19	Apr 30	Sep 19
1995	Jun 18	Sep 22	May 8	Sep 22
1994	May 2	Oct 6	May 1	Oct 18
1993	May 9	Oct 18	May 2	Oct 20
1992	May 11	Sep 26	Apr 21	Oct 8
1991	no data	Oct 5	no data	Oct 29

"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.