Conde, SD: frost dates by year

Last spring and first fall frost at NOAA station USC00391917, 1979 to 2007, measured from daily minimum temperatures.

Elevation 1,330 ft, 45.154, -98.101. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 16	Sep 24
Earliest	Apr 22 (1998)	Sep 19 (2003)
Latest	May 24 (2002)	Oct 22 (2007)
Trend	3.5 days earlier per decade	4.9 days later per decade
Years with data	14	14

At 28°F (hard freeze) the median last spring date is Apr 30 and the median first fall date is Oct 3.

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	no data	Oct 22	no data	Oct 22
2006	no data	Sep 20	no data	Sep 20
2005	May 16	Sep 29	May 16	Oct 19
2004	May 15	Sep 28	May 14	Oct 2
2003	May 20	Sep 19	Apr 12	Sep 19
2002	May 24	Sep 24	May 24	Oct 9
2001	Apr 24	Sep 24	Apr 24	Oct 5
2000	May 14	no data	Apr 21	no data
1999	Apr 24	Sep 27	Apr 23	Oct 2
1998	Apr 22	no data	Apr 17	no data
1997	May 20	Oct 14	May 20	Oct 20
1996	May 13	Sep 24	May 4	Oct 3
1995	May 17	Sep 20	Apr 22	Sep 20
1994	May 9	Sep 23	Apr 30	Oct 9
1993	May 20	Sep 23	Apr 30	Oct 2
1992	no data	Sep 27	no data	Sep 28
1979	May 23	no data	May 3	no data

"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.