Rison, AR: frost dates by year

Last spring and first fall frost at NOAA station USC00036174, 2004 to 2019, measured from daily minimum temperatures.

Elevation 280 ft, 33.954, -92.202. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Mar 21	Nov 7
Earliest	Mar 4 (2010)	Oct 23 (2006)
Latest	Apr 15 (2018)	Nov 26 (2009)
Trend	4.1 days later per decade	2.6 days later per decade
Years with data	15	13

At 28°F (hard freeze) the median last spring date is Feb 26 and the median first fall date is Nov 16.

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
2019	Apr 1	no data	Feb 8	no data
2018	Apr 15	Nov 9	Feb 7	Nov 9
2017	Mar 18	Oct 28	Feb 4	Oct 29
2016	Mar 21	Nov 13	Feb 26	Nov 20
2015	Mar 7	Nov 22	Mar 7	Nov 22
2014	Apr 15	Nov 1	Mar 7	Nov 13
2013	no data	Nov 13	no data	Nov 13
2012	Mar 4	no data	Feb 12	no data
2011	Mar 11	no data	Feb 12	no data
2010	Mar 4	Oct 30	Mar 4	Nov 27
2009	Apr 7	Nov 26	Mar 2	Nov 27
2008	Apr 15	Oct 28	Mar 9	Nov 16
2007	Apr 8	Nov 7	Apr 8	Nov 16
2006	Mar 26	Oct 23	Feb 20	Nov 3
2005	Mar 17	Oct 24	Feb 10	Nov 17
2004	Mar 10	Nov 25	Feb 27	Dec 1

"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.