Weston 3NW, NE: frost dates by year

Last spring and first fall frost at NOAA station USC00259193, 2004 to 2020, measured from daily minimum temperatures.

Elevation 1,365 ft, 41.221, -96.778. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 22	Oct 11
Earliest	Apr 9 (2010)	Sep 29 (2005)
Latest	May 18 (2014)	Oct 29 (2015)
Trend	3.8 days earlier per decade	4.0 days later per decade
Years with data	16	16

At 28°F (hard freeze) the median last spring date is Apr 12 and the median first fall date is Oct 18.

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
2020	Apr 18	no data	Apr 18	no data
2019	Apr 15	Oct 11	Apr 15	Oct 12
2018	Apr 20	Oct 12	Apr 19	Oct 15
2017	Apr 27	Oct 11	Apr 11	Oct 27
2016	Apr 13	Oct 13	Apr 12	Oct 13
2015	Apr 23	Oct 29	Apr 22	Oct 30
2014	May 18	Oct 11	Apr 16	Oct 31
2013	May 4	Oct 21	Apr 25	Oct 23
2012	Apr 12	Oct 6	Mar 10	Oct 7
2011	May 17	Oct 19	Apr 5	Oct 21
2010	Apr 9	Oct 4	Apr 9	Nov 2
2009	Apr 15	Oct 4	Apr 12	Oct 10
2008	Apr 30	Oct 27	Apr 15	Oct 28
2007	Apr 14	Oct 25	Apr 10	Nov 6
2006	Apr 27	Oct 12	Mar 27	Oct 12
2005	May 3	Sep 29	Apr 3	Oct 7
2004	no data	Oct 2	no data	Oct 2

"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.