Pocahontas, IA: frost dates by year

Last spring and first fall frost at NOAA station USC00136719, 1951 to 2025, measured from daily minimum temperatures.

Elevation 1,212 ft, 42.729, -94.661. Download the data (JSON) · NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 29	Oct 3
Earliest	Apr 6 (1998)	Sep 13 (2014)
Latest	May 22 (1963)	Oct 29 (1963)
Trend	1.0 days earlier per decade	little change (less than half a day per decade)
Years with data	69	67

At 28°F (hard freeze) the median last spring date is Apr 18 and the median first fall date is Oct 14.

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
2025	Apr 16	no data	Apr 9	no data
2024	Apr 22	Oct 15	Apr 5	Oct 15
2023	Apr 26	Oct 10	Apr 25	Oct 28
2022	May 4	Sep 28	Apr 27	Oct 8
2021	Apr 25	Oct 22	Apr 22	Nov 1
2020	May 9	Oct 4	Apr 16	Oct 4
2019	Apr 28	no data	Apr 28	no data
2018	Apr 21	Oct 12	Apr 21	Oct 21
2017	Apr 29	Oct 27	Apr 28	Oct 29
2016	Apr 13	Oct 13	Apr 12	Oct 13
2015	Apr 22	Oct 18	Apr 4	Oct 30
2014	no data	Sep 13	no data	Oct 11
2013	May 4	no data	Apr 24	no data
2012	Apr 17	Sep 23	Apr 12	Oct 5
2011	May 3	Sep 23	Apr 5	Oct 19
2010	May 9	Oct 2	Apr 9	Oct 28
2009	Apr 21	Oct 7	Apr 15	Oct 10
2008	Apr 29	Oct 16	Apr 29	Oct 28
2007	Apr 14	Sep 15	Apr 13	Oct 28
2006	May 6	Sep 20	Apr 8	Oct 12
2005	May 4	Oct 8	May 4	Oct 8
2004	May 3	Oct 2	Apr 13	Oct 31
2003	Apr 11	Oct 1	Apr 10	Oct 2
2002	May 2	Sep 24	Apr 9	Oct 7
2001	Apr 24	Oct 6	Apr 18	Oct 17
2000	Apr 13	Sep 21	Apr 12	Oct 6
1999	Apr 19	Sep 21	Apr 18	Oct 4
1998	Apr 6	Oct 8	Mar 24	Nov 3
1997	May 15	Oct 15	May 13	Oct 21
1996	Apr 30	Oct 3	Apr 23	Oct 28
1995	Apr 28	Sep 22	Apr 5	Oct 22
1994	May 2	Oct 12	Apr 8	Oct 26
1993	Apr 20	Sep 28	Apr 10	Oct 10
1992	May 6	Sep 29	Apr 13	Oct 17
1991	Apr 11	Sep 19	Apr 11	Oct 7
1990	May 3	Oct 10	Apr 18	Oct 18
1989	May 7	Sep 23	Apr 20	Oct 4
1988	Apr 27	Oct 4	Apr 20	Oct 5
1987	Apr 7	Oct 3	Apr 5	Oct 3
1986	May 2	Oct 6	Apr 22	Oct 14
1985	Apr 15	no data	Apr 9	no data
1984	May 9	Sep 26	Apr 30	Sep 26
1980	no data	Sep 26	no data	Oct 4
1979	May 12	no data	May 12	no data
1978	May 7	Oct 8	May 2	Oct 16
1977	no data	Oct 3	no data	Oct 12
1976	May 8	Oct 6	May 3	Oct 6
1975	Apr 21	Sep 25	Apr 14	Oct 2
1974	May 6	Sep 22	Apr 24	Sep 22
1973	Apr 28	Oct 16	Apr 13	Nov 4
1972	Apr 25	Sep 30	Apr 14	Oct 15
1971	May 12	Sep 24	Apr 14	Oct 31
1970	May 2	Oct 9	Apr 23	Oct 10
1969	Apr 28	Oct 14	Mar 31	Oct 14
1968	May 15	Oct 4	Apr 25	Oct 25
1967	May 6	Sep 28	May 3	Oct 11
1966	May 10	Oct 1	May 9	Oct 24
1965	Apr 28	Oct 13	Apr 28	Oct 24
1964	Apr 13	Oct 9	Apr 8	Oct 9
1963	May 22	Oct 29	May 22	Oct 29
1962	Apr 19	Sep 20	Apr 17	Oct 24
1961	May 2	Sep 28	May 2	Sep 28
1960	May 8	Oct 16	Apr 30	Oct 19
1959	Apr 21	Oct 9	Apr 13	Oct 12
1958	Apr 29	Oct 1	Apr 29	Oct 28
1957	May 4	Oct 10	May 4	Oct 10
1956	May 4	Sep 30	Apr 30	Sep 30
1955	Apr 7	Oct 15	Apr 7	Oct 15
1954	May 8	Sep 22	May 7	Oct 18
1953	May 13	Sep 22	Apr 20	Oct 26
1952	Apr 24	Sep 23	Apr 16	Oct 6
1951	Apr 26	Sep 28	Apr 23	Sep 28

"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 1991–2020 frost probabilities.