Taylor 7 Nnw, ND: frost dates by year

Last spring and first fall frost at NOAA station USC00328660, 2002 to 2021, measured from daily minimum temperatures.

Elevation 2,220 ft, 46.999, -102.476. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 25	Sep 17
Earliest	May 2 (2018)	Aug 18 (2002)
Latest	Jun 24 (2004)	Oct 6 (2016)
Trend	0.6 days earlier per decade	7.3 days later per decade
Years with data	17	19

At 28°F (hard freeze) the median last spring date is May 15 and the median first fall date is Oct 1.

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
2021	May 31	Sep 25	May 11	Oct 21
2020	May 29	Sep 8	May 12	Sep 8
2019	May 31	Sep 28	May 12	Oct 10
2018	May 2	Sep 26	Apr 26	Sep 28
2017	May 31	Sep 17	May 30	Oct 4
2016	no data	Oct 6	no data	Oct 8
2015	May 30	Sep 11	May 20	Sep 29
2014	May 15	Sep 12	May 15	Oct 4
2013	no data	Oct 4	no data	Oct 6
2012	no data	Sep 7	no data	Sep 12
2011	May 15	no data	May 15	no data
2010	May 12	Sep 17	May 10	Oct 18
2009	Jun 9	Oct 6	May 23	Oct 8
2008	May 27	Sep 14	May 11	Oct 9
2007	May 16	Sep 14	May 1	Sep 14
2006	May 15	Sep 19	May 15	Sep 20
2005	May 15	Sep 22	May 15	Sep 22
2004	Jun 24	Sep 7	Jun 24	Oct 1
2003	May 20	Sep 19	May 20	Sep 28
2002	May 25	Aug 18	May 24	Sep 25

"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.